November 22, 2022 | Page 15 of 15 | Pyridine-derivatives

Wang, Ru-Yuan et al. published their research in International Journal of Molecular Sciences in 2022 | CAS: 54-47-7

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Electric Literature of C8H10NO6P

Local and Systemic Response to Heterogeneous Sulfate Resupply after Sulfur Deficiency in Rice was written by Wang, Ru-Yuan;Liu, Li-Han;Zhao, Fang-Jie;Huang, Xin-Yuan. And the article was included in International Journal of Molecular Sciences in 2022.Electric Literature of C8H10NO6P The following contents are mentioned in the article:

Sulfur (S) is an essential mineral nutrient required for plant growth and development. Plants usually face temporal and spatial variation in sulfur availability, including the heterogeneous sulfate content in soils. As sessile organisms, plants have evolved sophisticated mechanisms to modify their gene expression and physiol. processes in order to optimize S acquisition and usage. Such plasticity relies on a complicated network to locally sense S availability and systemically respond to S status, which remains poorly understood. Here, we took advantage of a split-root system and performed transcriptome-wide gene expression anal. on rice plants in S deficiency followed by sulfate resupply. S deficiency altered the expressions of 6749 and 1589 genes in roots and shoots, resp., accounting for 18.07% and 4.28% of total transcripts detected. Homogeneous sulfate resupply in both split-root halves recovered the expression of 27.06% of S-deficiency-responsive genes in shoots, while 20.76% of S-deficiency-responsive genes were recovered by heterogeneous sulfate resupply with only one split-root half being resupplied with sulfate. The local sulfate resupply response genes with expressions only recovered in the split-root half resupplied with sulfate but not in the other half remained in S deficiency were identified in roots, which were mainly enriched in cellular amino acid metabolic process and root growth and development. Several systemic response genes were also identified in roots, whose expressions remained unchanged in the split-root half resupplied with sulfate but were recovered in the other split-root half without sulfate resupply. The systemic response genes were mainly related to calcium signaling and auxin and ABA signaling. In addition, a large number of S-deficiency-responsive genes exhibited simultaneous local and systemic responses to sulfate resupply, such as the sulfate transporter gene OsSULTR1;1 and the O-acetylserine (thiol) lyase gene, highlighting the existence of a systemic regulation of sulfate uptake and assimilation in S deficiency plants followed by sulfate resupply. Our studies provided a comprehensive transcriptome-wide picture of a local and systemic response to heterogeneous sulfate resupply, which will facilitate an understanding of the systemic regulation of S homeostasis in rice. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Electric Literature of C8H10NO6P).

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Marcillo, Andrea et al. published their research in Journal of Chromatography A in 2020 | CAS: 700-16-3

2,3,4,5,6-Perfluoropyridine (cas: 700-16-3) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Electric Literature of C5F5N

challenges of fast sampling of volatiles for thermal desorption gas chromatog. – mass spectrometry was written by Marcillo, Andrea;Weiss, Brigitte M.;Widdig, Anja;Birkemeyer, Claudia. And the article was included in Journal of Chromatography A in 2020.Electric Literature of C5F5N The following contents are mentioned in the article:

Fast active sampling of volatile organic compounds (VOCs) under field conditions still is a great challenge especially when the exposure time to the source of emissions is a restricting factor. Hence, to identify ideal conditions for such applications, we systematically compared fast active sampling of VOCs collected on two common adsorbents under two regimes: first, very low gas volumes (from 300 mL) sampled at nominal flow rate and, second, sampling at the maximal applicable flow rate (0.5 L/min) before loss of sorbent material was experienced. For XAD-2 and Tenax TA, efficient sorbents for on-site VOC-sampling followed by thermal desorption GC-MS, significant differences in the signal response of volatile compounds were related not only to the varied exptl. factors alone, but also to their interactions and to compound volatility. In the first regime, volatiles (∼0.004-3.13 mM) from Tenax TA gave the highest signal response only above 800 mL sampled gas volume while at low concentrations (∼0.004-0.12 mM), satisfactory recovery from XAD-2 required longer analyte-sorbent interaction. For the second regime, the relative recovery was severely impaired down to 73 ± 23%, n = 56 for Tenax TA and 72 ± 17%, n = 56 for XAD-2 at intermediate concentration, and 79 ± 11%, n = 84 for Tenax TA at high concentration compared to the relative recovery at standard flow rate. Neither Tenax TA nor XAD-2 provided a 100% total recovery (calculated using breakthrough values) for any of the evaluated compounds Finally, two-way and three-way interactions identified in a multi-variable model, explained not only the dependence of the signal response on different exptl. variables, but also their complex interplay affecting the recovery of the VOCs. In conclusion, we show for the first time that XAD-2, a material only recently introduced for the adsorption of volatiles from the gas phase, competes well with the standard material Tenax TA under conditions of fast sampling. Due to the similar absolute recovery with Tenax TA even at low concentration and with regard to the better detection limits, we consider XAD-2 the better choice for fast sampling of VOCs, particularly with low sample volumes at regular flow. For fast sampling with high flow rate, however, both sorbents might be selected only if the corresponding recovery loss can be accepted for the study. This study involved multiple reactions and reactants, such as 2,3,4,5,6-Perfluoropyridine (cas: 700-16-3Electric Literature of C5F5N).

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Whyte, Michael P. et al. published their research in Bone (New York, NY, United States) in 2022 | CAS: 54-47-7

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Recommanded Product: (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate

Hypophosphatasia: Vitamin B₆ status of affected children and adults was written by Whyte, Michael P.;Zhang, Fan;Wenkert, Deborah;Mack, Karen E.;Bijanki, Vinieth N.;Ericson, Karen L.;Coburn, Stephen P.. And the article was included in Bone (New York, NY, United States) in 2022.Recommanded Product: (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate The following contents are mentioned in the article:

Hypophosphatasia (HPP) is the heritable dento-osseous disease caused by loss-of-function mutation(s) of the gene ALPL that encodes the tissue-nonspecific isoenzyme of alk. phosphatase (TNSALP). TNSALP is a cell-surface homodimeric phosphomonoester phosphohydrolase expressed in healthy people especially in the skeleton, liver, kidneys, and developing teeth. In HPP, diminished TNSALP activity leads to extracellular accumulation of its natural substrates including inorganic pyrophosphate (PPi), an inhibitor of mineralization, and pyridoxal 5-phosphate (PLP), the principal circulating form of vitamin B6 (B6). Autosomal dominant and autosomal recessive inheritance involving >450 usually missense defects scattered throughout ALPL largely explains the remarkably broad-ranging severity of this inborn-error-of-metabolism In 1985 when we identified elevated plasma PLP as a biochem. hallmark of HPP, all 14 investigated affected children and adults had markedly increased PLP levels. However, pyridoxal (PL), the dephosphorylated form of PLP that enters cells to cofactor many enzymic reactions, was not low but often inexplicably elevated. Levels of pyridoxic acid (PA), the B6 degradation product quantified to assess B6 sufficiency, were unremarkable. Canonical signs or symptoms of B6 deficiency or toxicity were absent. B6-dependent seizures in infants with life-threatening HPP were later explained by their profound deficiency of TNSALP activity blocking PLP dephosphorylation to PL and diminishing gamma-aminobutyric acid synthesis in the brain. Now, there is speculation that altered B6 metabolism causes further clin. complications in HPP. Herein, we assessed the plasma PL and PA levels accompanying previously reported elevated plasma PLP concentrations in 150 children and adolescents with HPP. Their mean (SD) plasma PL level was nearly double the mean for our healthy pediatric controls: 66.7 (59.0) nM vs. 37.1 (22.2) nM (P < 0.0001), resp. Their PA levels were broader than our pediatric control range, but their mean value was normal; 40.2 (25.1) nM vs. 39.3 (9.9) nM (P = 0.7793), resp. In contrast, adults with HPP often had plasma PL and PA levels suggestive of dietary B6 insufficiency. We discuss why the B6 levels of our pediatric patients with HPP would not cause B6 toxicity or deficiency, whereas in affected adults dietary B6 insufficiency can develop. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Recommanded Product: (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate).

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Whyte, Michael P. et al. published their research in Bone (New York, NY, United States) in 2022 | CAS: 54-47-7

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Application In Synthesis of (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate

Hypophosphatasia: Vitamin B₆ status of affected children and adults was written by Whyte, Michael P.;Zhang, Fan;Wenkert, Deborah;Mack, Karen E.;Bijanki, Vinieth N.;Ericson, Karen L.;Coburn, Stephen P.. And the article was included in Bone (New York, NY, United States) in 2022.Application In Synthesis of (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate The following contents are mentioned in the article:

Hypophosphatasia (HPP) is the heritable dento-osseous disease caused by loss-of-function mutation(s) of the gene ALPL that encodes the tissue-nonspecific isoenzyme of alk. phosphatase (TNSALP). TNSALP is a cell-surface homodimeric phosphomonoester phosphohydrolase expressed in healthy people especially in the skeleton, liver, kidneys, and developing teeth. In HPP, diminished TNSALP activity leads to extracellular accumulation of its natural substrates including inorganic pyrophosphate (PPi), an inhibitor of mineralization, and pyridoxal 5-phosphate (PLP), the principal circulating form of vitamin B6 (B6). Autosomal dominant and autosomal recessive inheritance involving >450 usually missense defects scattered throughout ALPL largely explains the remarkably broad-ranging severity of this inborn-error-of-metabolism In 1985 when we identified elevated plasma PLP as a biochem. hallmark of HPP, all 14 investigated affected children and adults had markedly increased PLP levels. However, pyridoxal (PL), the dephosphorylated form of PLP that enters cells to cofactor many enzymic reactions, was not low but often inexplicably elevated. Levels of pyridoxic acid (PA), the B6 degradation product quantified to assess B6 sufficiency, were unremarkable. Canonical signs or symptoms of B6 deficiency or toxicity were absent. B6-dependent seizures in infants with life-threatening HPP were later explained by their profound deficiency of TNSALP activity blocking PLP dephosphorylation to PL and diminishing gamma-aminobutyric acid synthesis in the brain. Now, there is speculation that altered B6 metabolism causes further clin. complications in HPP. Herein, we assessed the plasma PL and PA levels accompanying previously reported elevated plasma PLP concentrations in 150 children and adolescents with HPP. Their mean (SD) plasma PL level was nearly double the mean for our healthy pediatric controls: 66.7 (59.0) nM vs. 37.1 (22.2) nM (P < 0.0001), resp. Their PA levels were broader than our pediatric control range, but their mean value was normal; 40.2 (25.1) nM vs. 39.3 (9.9) nM (P = 0.7793), resp. In contrast, adults with HPP often had plasma PL and PA levels suggestive of dietary B6 insufficiency. We discuss why the B6 levels of our pediatric patients with HPP would not cause B6 toxicity or deficiency, whereas in affected adults dietary B6 insufficiency can develop. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Application In Synthesis of (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate).

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Schorgg, Paula et al. published their research in Clinical Nutrition in 2022 | CAS: 54-47-7

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Product Details of 54-47-7

Increased vitamin B6 turnover is associated with greater mortality risk in the general US population: A prospective biomarker study was written by Schorgg, Paula;Karavasiloglou, Nena;Beyer, Anika;Cantwell, Marie;Danquah, Ina;Gojda, Jan;Rohrmann, Sabine;Cassidy, Aedin;Baernighausen, Till;Cahova, Monika;Kuehn, Tilman. And the article was included in Clinical Nutrition in 2022.Product Details of 54-47-7 The following contents are mentioned in the article:

Vitamin B6 status and mortality risk are inversely associated in different patient groups, while prospective studies in the general population are lacking. Here, for the first time, we evaluated the association between biomarkers of vitamin B6 status and mortality risk in a large population-based study.The vitamin B6 vitamers pyridoxal-5′-phosphat (PLP) and 4-pyridoxic acid (4-PA) were measured by high-performance liquid chromatog. in the National Health and Nutrition Examination Survey (NHANES) between 2005 and 2010. Participants’ vital status and causes of death were recorded until Dec. 2015. Multivariable Cox regression analyses were carried out to estimate Hazard Ratios (HRs) and 95% confidence intervals (CIs) of mortality across quintiles of PLP, 4-PA, and the ratio of 4-PA and PLP.Out of 15,304 study participants aged between 20 and 85 years at baseline, 1666 (7.7%) died during a median follow-up time of 7.8 years. An inverse association between PLP and mortality was found in a multivariable model adjusted for socioeconomic and lifestyle factors but became statistically non-significant upon adjustment for routine biomarkers (C-reactive protein, creatinine, albumin, and alk. phosphatase). There was a significant linear trend for a pos. association between 4-PA levels and mortality risk in the fully adjusted regression model, although a comparison of extreme quintiles (quintile 5 vs. quintile 1) did not show a significant difference (HR_Q5vs.Q1 (95% CI): 1.19 (0.93, 1.51), p_linear _trend = 0.02). A pos. association between the 4-PA/PLP ratio and all-cause mortality was observed in the multivariable model, with an HRs_Q5vs.Q1 of 1.45 (95% CI: 1.14, 1.85; p_linear _trend<0.0001). There were no significant associations between the biomarkers and cardiovascular or cancer mortality. The association between 4-PA/PLP and mortality risk was heterogeneous across age groups, and only statistically significant among participants older than 65 years at baseline (HR_Q5vs.Q1 (95% CI): 1.72 (1.29, 2.29), p_linear _trend<0.0001). In this group, 4-PA/PLP was also associated with cancer mortality, with an HR _Q5vs.Q1 of 2.16 (1.20, 3.90), p_linear _trend = 0.02).Increased vitamin B6 turnover, as indicated by a higher 4-PA/PLP ratio, was associated with all-cause and cancer mortality among the older U.S. general population. Intervention trials are needed to assess whether older individuals with a high 4-PA/PLP ratio would benefit from increased vitamin B6 intake. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Product Details of 54-47-7).

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Product Details of 54-47-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Schorgg, Paula et al. published their research in Clinical Nutrition in 2022 | CAS: 54-47-7

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Product Details of 54-47-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Henecka, Hans et al. published their research in Chemische Berichte in 1949 | CAS: 58610-61-0

Ethyl 5-cyano-4-methyl-6-oxo-1,6-dihydropyridine-2-carboxylate (cas: 58610-61-0) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Formula: C10H10N2O3

β-Dicarbonyl compounds. V. The condensation of acetoneoxalic ester and O-ethylacetoneoxalic ester with cyanoacetamide was written by Henecka, Hans. And the article was included in Chemische Berichte in 1949.Formula: C10H10N2O3 The following contents are mentioned in the article:

Heating 8.4 g. NCCH₂CONH₂ (I) in 33 cc. H₂O with 16 g. AcCH:C(OH)CO₂Et (II) in 5 cc. EtOH and 0.5 cc. piperidine 6 hrs. on a water bath gives 14.7% Et 2-methyl-5-cyano-6(1H)-pyridone-4-carboxylate, CH:CMe.NH.CO.C(CN):CCO₂Et (III), leaflets, m. 208°. II (160 g.) is added dropwise to 84 g. I in 1200 cc. absolute EtOH and 450 cc. EtOH containing 23 g. Na, the mixture heated 6 hrs. at 60-5°, and the Na salt of III which seps. is dissolved in 2 l. H₂O; acidification of the solution gives 64.5% III, m. 213°. Dropwise addition of 160 g. II to 84 g. I in 2 l. boiling Me₂CO and 140 g. anhydrous K₂CO₃, refluxing the mixture 6 hrs., diluting with H₂O, and acidifying give 82.2% III. In the same way I and MeOCH₂COCH₂Ac give 81% 2-methyl-4-methoxymethyl-5-cyano-6(1H)-pyridone, m. 235-7°. Heating 50 g. III in 250 cc. POCl₃ with 50 g. PCl₅ 1 hr. on a water bath, distilling off the POCl₃ in vacuo at 30-40°, extracting the residue with CHCl₃, and distilling off the CHCl₃ in vacuo from the neutralized solution give 62.5% Et 2-methyl-5-cyano-6-chloro-4-pyridinecarboxylate (IV), b_2.5 144-6°, which soon crystallizes. Reduction of 10 g. IV in 200 cc. EtOH and 15 cc. concentrated HCl with Pd-charcoal in 150 cc. 0.1 N HCl and 9 g. charcoal (Merck) 24 hrs. with H gives 41.7% 2-methyl-5-aminomethyl-4-pyridinecarboxylic acid lactam, fine crystals, m. 244-6°. To a boiling mixture of 100 g. III in 750 cc. Me₂CO and 70 g. K₂CO₃, is added 62 g. Me₂SO₄ dropwise with stirring, the filtered solution evaporated, and the residue recrystallized from C₆H₆, giving 55.3% Et 1,2-dimethyl-5-cyano-6(1H)-pyridone-4-carboxylate, pale yellow crystals, m.135-6°, from C₆H₆. From the C₆H₆ mother liquor is isolated 20.6% Et 2-methyl-5-cyano-6-methoxy-4-pyridinecarboxylate, m. 75-6°. Boiling 84 g. I with 186 g. MeC(OEt):CHCOCO₂Et in the presence of 140 g. K₂CO₃ 14 hrs. gives 73% Et 4-methyl-5-cyano-6(1H)-pyridone-2-carboxylate (V), m. 235-7°. Treatment of V with POCl₃ gives 73.5% Et 4-methyl-5-cyano-6-chloro-2-pyridinecarboxylate (VI), b₃ 157°, m. 90-1°. Reduction of 5 g. VI in HCl 24 hrs. with H in the presence of Pd and treatment of the product with NaNO₂ at 60° give Et 4-methyl-5-hydroxymethyl-2-pyridine-carboxylate, fine crystals from CH₂Cl₂-petr. ether, m. 98-100°. The reaction mechanism of the condensation is explained on the basis of the electron theory. This study involved multiple reactions and reactants, such as Ethyl 5-cyano-4-methyl-6-oxo-1,6-dihydropyridine-2-carboxylate (cas: 58610-61-0Formula: C10H10N2O3).

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Yang, Shan et al. published their research in International Journal of Molecular Sciences in 2022 | CAS: 54-47-7

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Synthetic Route of C8H10NO6P

Integrated Analysis of Transcriptome and Metabolome Reveals the Regulation of Chitooligosaccharide on Drought Tolerance in Sugarcane (Saccharum spp. Hybrid) under Drought Stress was written by Yang, Shan;Chu, Na;Zhou, Hongkai;Li, Jiashuo;Feng, Naijie;Su, Junbo;Deng, Zuhu;Shen, Xuefeng;Zheng, Dianfeng. And the article was included in International Journal of Molecular Sciences in 2022.Synthetic Route of C8H10NO6P The following contents are mentioned in the article:

Sugarcane (Saccharum spp. hybrid) is an important crop for sugar and biofuels, and often suffers from water shortages during growth. Currently, there is limited knowledge concerning the mol. mechanism involved in sugarcane response to drought stress (DS) and whether chitooligosaccharide could alleviate DS. Here, we carried out a combined transcriptome and metabolome of sugarcane in three different treatment groups: control group (CG), DS group, and DS + chitooligosaccharide group (COS). A total of 12,275 (6404 up-regulated and 5871 down-regulated) differentially expressed genes (DEGs) were identified when comparing the CG and DS transcriptomes (T_CG/DS), and 2525 (1261 up-regulated and 1264 down-regulated) DEGs were identified in comparing the DS and COS transcriptomes (T_DS/COS). GO and KEGG anal. showed that DEGs associated with photosynthesis were significantly enriched and had down-regulated expression. For T_DS/COS, photosynthesis DEGs were also significantly enriched but had up-regulated expression. Together, these results indicate that DS of sugarcane has a significantly neg. influence on photosynthesis, and that COS can alleviate these neg. effects. In metabolome anal., lipids, others, amino acids and derivatives and alkaloids were the main significantly different metabolites (SDMs) observed in sugarcane response to DS, and COS treatment reduced the content of these metabolites. KEGG anal. of the metabolome showed that 2-oxocarboxylic acid metabolism, ABC transporters, biosynthesis of amino acids, glucosinolate biosynthesis and valine, leucine and isoleucine biosynthesis were the top-5 KEGG enriched pathways when comparing the CG and DS metabolome (M_CG/DS). Comparing DS with COS (M_DS/COS) showed that purine metabolism and phenylalanine metabolism were enriched. Combined transcriptome and metabolome anal. revealed that pyruvate and phenylalanine metabolism were KEGG-enriched pathways for CG/DS and DS/COS, resp. For pyruvate metabolism, 87 DEGs (47 up-regulated and 40 down-regulated) and five SDMs (1 up-regulated and 4 down-regulated) were enriched. Pyruvate was closely related with 14 DEGs (|r| > 0.99) after Pearson’s correlation anal., and only 1 DEG (Sspon.02G0043670-1B) was pos. correlated. For phenylalanine metabolism, 13 DEGs (7 up-regulated and 6 down-regulated) and 6 SDMs (1 up-regulated and 5 down-regulated) were identified. Five PAL genes were closely related with 6 SDMs through Pearson’s correlation anal., and the novel.31257 gene had significantly up-regulated expression. Collectively, our results showed that DS has significant adverse effects on the physiol., transcriptome, and metabolome of sugarcane, particularly genes involved in photosynthesis. We further show that COS treatment can alleviate these neg. effects. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Synthetic Route of C8H10NO6P).

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Synthetic Route of C8H10NO6P

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Shajani-Yi, Zahra et al. published their research in Bone (New York, NY, United States) in 2022 | CAS: 54-47-7

(4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Recommanded Product: 54-47-7

Urine phosphoethanolamine is a specific biomarker for hypophosphatasia in adults was written by Shajani-Yi, Zahra;Ayala-Lopez, Nadia;Black, Margo;Dahir, Kathryn McCrystal. And the article was included in Bone (New York, NY, United States) in 2022.Recommanded Product: 54-47-7 The following contents are mentioned in the article:

We investigated the utility of urine phosphoethanolamine (PEA) as a marker to aid in diagnosing and/or confirming hypophosphatasia (HPP) in adults and for monitoring patients on enzyme replacement therapy (ERT). Data was collected from seventy-eight adults who were referred to the Vanderbilt Program for Metabolic Bone Disease for evaluation of a possible or confirmatory HPP diagnosis between July 2014 through Dec. 2019. Fifty-nine patients were diagnosed with HPP and nineteen were excluded from a diagnosis of HPP. The urine PEA results of those patients with a confirmed diagnosis of HPP and those patients with a diagnosis of HPP excluded were captured and compared to other laboratory and clin. parameters consistent with HPP, including alk. phosphatase (ALP) activity, plasma pyridoxal 5′-phosphate (PLP), the presence of musculoskeletal abnormalities, and genetic testing for pathogenic mutations in ALPL. Initial urine PEA values in patients in our HPP cohort and not on ERT were significantly higher (median = 150.0 nmol/mg creatinine, IQR = 82.0-202.0) compared patients in our HPP neg. group (median 18.0 nmol/mg creatinine, IQR = 14.0-30.0, p < 0.0001) and higher than patients on ERT (median 65.0 nmol/mg creatinine, IQR = 45.3-79.8). Patients who began ERT had a decline in urine PEA levels after treatment with a mean decrease of 68.1 %. Plasma ALP levels were significantly lower in the group of patients with HPP and not on ERT group (median = 24.0 U/L, IQR = 15.0-29.50) compared to the patients without HPP (median = 45.50 U/L, IQR = 34.0-62.0;) and plasma PLP levels were significantly higher in the HPP non-ERT group (median = 284.0 nmol/L, IQR = 141.0-469.4) compared to the patients without HPP (median = 97.5 nmol/L, IQR = 43.7-206.0;). The area under the curve (AUC) of urine PEA, ALP, and PLP to distinguish between HPP and non-HPP patients is 0.968, 0.927 and 0.781, resp., in our cohort. Urine PEA had 100 % specificity (95 % CI of 83.2 % to 100.0 %) for diagnosing HPP at a value >53.50 nmol/mg creatinine with a sensitivity of 88.4 %; 95%CI 75.5 to 94.9 %. ALP had a 100 % specificity (95 % CI of 82.4 % to 100.0 %) for diagnosing HPP at a value <30.5 U/L with a sensitivity of 77.2 %; (95%CI 64.8 to 86.2 %). PLP had a 100 % specificity (95 % CI of 81.6 % to 100.0 %) for diagnosing HPP at a value >436 nmol/L with a sensitivity of 26.9 %; (95%CI 16.8 to 40.3 %). The most common pathogenic or likely pathogenic mutations in our cohort were c.1250A>G (p.Asn417Ser), c.1133A>T (p.Asp378Val), c.881A>C (p.Asp294Ala), c.1171C>T (p.Arg391Cys), and c.571G>A, (p.Glu191Lys). Urine PEA is a promising diagnostic and confirmatory marker for HPP in patients undergoing investigation for HPP. Urine PEA also has potential use as a marker to monitor ERT compliance. Future studies are necessary to evaluate the association between PEA levels and clin. outcomes. This study involved multiple reactions and reactants, such as (4-Formyl-5-hydroxy-6-methylpyridin-3-yl)methyl dihydrogen phosphate (cas: 54-47-7Recommanded Product: 54-47-7).

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Paul, Ursula S. D. et al. published their research in Chemistry – A European Journal in 2017 | CAS: 700-16-3

2,3,4,5,6-Perfluoropyridine (cas: 700-16-3) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Computed Properties of C5F5N

Ligand versus Complex: C-F and C-H Bond Activation of Polyfluoroaromatics at a Cyclic (Alkyl)(Amino)Carbene was written by Paul, Ursula S. D.;Radius, Udo. And the article was included in Chemistry – A European Journal in 2017.Computed Properties of C5F5N The following contents are mentioned in the article:

C-F and C-H bond activation reactions of polyfluoroaroms. at the cyclic (alkyl)(amino)carbene (cAAC) cAAC^methyl (1) are reported. Studies on the C-F bond activation using the cAAC-stabilized nickel(0) complex [Ni(cAAC^methyl)₂] (2) have shown that 2 does not react with fluorinated arenes. However, these investigations led to the observation of C-F bond cleavage of perfluorinated arenes by the carbene ligand cAAC^methyl (1) itself. The reaction of 1 with C₆F₆, C₆F₅-C₆F₅, C₆F₅-CF₃, and C₅F₅N afforded the insertion products of cAAC into one of the C-F bonds of the substrate, i.e., the C-F bond activation products (cAAC^methyl)F(Ar^f) (Ar^f=C₆F₅ 4 a, C₆F₄-C₆F₅ 4 b, C₆F₄-CF₃ 4 c, C₅F₄N 4 d). These products decompose readily upon heating to 80 °C within a few hours in solution with formation of ionic iminium salts [(cAAC^methyl)(Ar^f)][X] 6 a-d or neutral alkenyl perfluoroaryl imine compounds 7 a-d. The compounds (cAAC^methyl)F(Ar^f) 4 a-d readily transfer fluoride, which has been exemplified by the fluoride transfer of all compounds using BF₃ etherate as fluoride acceptor. Fluoride transfer has also been achieved starting from (cAAC^methyl)F(C₆F₄-CF₃) (4 c) or (cAAC^methyl)F(C₅F₄N) (4 d) to other selected substrates such as trimethylchlorosilane, benzoyl chloride and tosyl chloride. Instead of C-F bond activation, insertion of the cAAC into the C-H bond was observed if 1 was treated with the partially fluorinated arenes C₆F₅H, 1,2,4,5-C₆F₄H₂, 1,3,5-C₆F₃H₃, and 1,3-C₆F₂H₄. The compounds (cAAC^methyl)H(Ar^f) (Ar^f=C₆F₅ 12 e, 2,3,5,6-C₆F₄H 12 f, 2,4,6-C₆F₃H₂ 12 g and 2,6-C₆F₂H₃ 12 h) have been isolated in good yields and have been characterized including X-ray anal. Fluorobenzene C₆FH₅ (pK_a ≈37), the least C-H acidic fluoroarene used in this study, does not react. In order to investigate the scope and limitations of this type of cAAC C-H bond activation reaction, cAAC^methyl (1) was treated with several other reagents of different C-H acidity such as imidazolium salts, imidazoles, esters, and trimethylphosphine. These investigations led to the isolation and characterization of the compounds [(cAAC^methyl)H(R₂Im^Me2)]X (13 a,b), (cAAC^methyl)H(Im^R2) (14 a-c), (cAAC^methyl)H(CH(COOCH₃)₂) (15 b) and (cAAC^methyl)H(CH₂-PMe₂) (16). Deprotonation of [(cAAC^methyl)H(Me₂Im^Me2)][BF₄] (13 a) at the cAAC carbon atom using KHMDS as a base led to isolation and structural characterization of the cAAC^methyl-NHC heterodimer (17). This study involved multiple reactions and reactants, such as 2,3,4,5,6-Perfluoropyridine (cas: 700-16-3Computed Properties of C5F5N).

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem