Day: July 28, 2021

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 20265-35-4, name is 2-Methoxy-3-nitropyridine. This compound has unique chemical properties. The synthetic route is as follows. COA of Formula: C6H6N2O3

Method 4 Synthesis of 7-methoxy-1H-pyrrolo[2,3-c]pyridine (Intermediate 5) A solution of R-4 (500 mg, 3.24 mmol) in anhydrous THF (20 mL) is cooled to -78° C. and vinylmagnesium bromide (9.73 mL of a 1 M solution in THF, 9.73 mmol) added. The reaction is stirred at -20° C. for 6 h then quenched with saturated aqueous NH4Cl solution and extracted with EtOAc. The organic phase is concentrated in vacuo and the crude material purified by flash chromatography (SiO2, 2percent to 10percent MeOH in DCM) to give the title intermediate I-5 (100 mg) m/z 148.9 [M+H].

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it, 20265-35-4, 2-Methoxy-3-nitropyridine.

Reference:
Patent; BARTOLOZZI, Alessandra; CHEN, Zhidong; DINES, Jonathon Alan; LO, Ho Yin; LOKE, Pui Leng; OLAGUE, Alan; RIETHER, Doris; TYE, Heather; WU, Lifen; ZINDELL, Renee M.; US2013/196967; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 86604-79-7, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 86604-79-7, name is 2,3,5-Trimethyl-4-nitropyridine 1-oxide. This compound has unique chemical properties. The synthetic route is as follows.

The 2,3,5-trimethyl-4-nitropyridine1-oxide (13.4 g, 73.6 mmol) obtained in the step (11c) was added to acetyl chloride (80 ml, 1,125 mmol) at -30 C. in a nitrogen atmosphere. The mixture was stirred at -30 C. to room temperature for 4 hours and 20 minutes. After the reaction mixture was concentrated, the residue was subjected to silica gel column chromatography (NH silica gel: 300 g, elution solvent: heptane, heptane/ethyl acetate=50/50, ethyl acetate, ethyl acetate/methanol=10/1) to obtain fractions containing a pure product of the title compound and fractions containing a crude product of the title compound. The fractions containing a crude product of the title compound was concentrated. The residue was suspended in ethyl acetate and the resulting precipitate was collected by filtration, washed with ethyl acetate and diethyl ether to obtain the title compound (Lot A, 1.58 g) as a white solid. The filtrate was concentrated. The residue was dissolved in chloroform and washed with a saturated aqueous solution of sodium hydrogen carbonate, dried over anhydrous sodium sulfate, filtered and concentrated. The residue was suspended in diethyl ether. The resulting precipitate was collected by filtration, washed with diethyl ether to obtain the title compound (Lot B, 2.69 g) as a pale brown solid. The fractions containing a pure product of the title compound were concentrated. The residue was dissolved in chloroform, washed with a saturated aqueous solution of sodium hydrogen carbonate, dried over anhydrous sodium sulfate, filtered and concentrated to obtain the title compound (Lot C, 6.56 g) as a pale white solid. The yield of the obtained title compounds of 3 lots was 85.7% in total. Lot A: 1H NMR(400 MHz, DMSO-d6) deltappm; 2.24(3H, s), 2.35(3H, s), 2.39(3H, s), 8.25(1H, s). Lot B: 1H NMR(400 MHz, DMSO-d6) deltappm; 2.24(3H, s), 2.35(3H, s), 2.39(3H, s), 8.25(1H, s). Lot C: 1H NMR(400 MHz, DMSO-d6) deltappm; 2.24(3H, s), 2.35(3H, s), 2.39(3H, s), 8.25(1H, s).

According to the analysis of related databases, 86604-79-7, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Eisai Co., Ltd.; US2007/10542; (2007); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 65515-32-4 ,Some common heterocyclic compound, 65515-32-4, molecular formula is C8H8ClNO3, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

To a solution of 6-Chloro-2-methoxy-nicotinic acid methyl ester (18.5.0 g, 0.092 mol) in 50 mL of NMP was added p-methoxybenzylamine (19.0 g, 0.14 mol) and triethylamine (10.Og, 0.1 mol). The mixture was heated to 70 0C for 4 h, cooled and diluted with water and extracted with ethyl acetate, washed with water, brine, dried with sodium sulfate, and evaporated to get an oil which was precipitated with ethylacetate/hexane mixture (1 :1). This was then filtered and dried to yield 15 g (60 %) of the target compound.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,65515-32-4, its application will become more common.

Reference:
Patent; SCIOS, INC.; WO2006/112828; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 10201-73-7, 2-Amino-4-methoxypyridine, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound, COA of Formula: C6H8N2O, blongs to pyridine-derivatives compound. COA of Formula: C6H8N2O

General procedure: To the solution of Acid SM-IX (70 mg, 0.20 mmol, 100 mol-%) in dry DMF (2 ml) under nitrogen atmosphere was added i-hydroxybenzotriazole hydrate (HOBt) (60 mg, 0.45 mmol, 220 mol-%), i-(3-dimethylaminopropyl)-3- ethylcarbodiimide hydrochloride (EDCI) (86 mg, 0.45 mmol, 220 mol-%) and 3- amino-6-methoxypyridazine (51 mg, 0.41 mmol, 200 mol-%). The reaction mix-ture was stirred at + 50 C for 3.5 hours. Water (3 ml) was added to the reaction mixture. The solid precipitate was filtered and washed several times with water and finally with heptane to yield 56 mg of crude product. Purification was done by flash chromatography. Amount of product compound 3 was 36 mg.1H-NMR (200 MHz, DMSO-d6): 0.98 (5, 3H), 1.20-2.47 (m, 16H),2.60-2.97 (m, 2H), 3.98 (5, 3H), 6.89-7.06 (m, 1H), 7.08-7.21 (m, 2H), 7.25 (d,1H), 8.26 (d, 1H), 10.94 (brs, 1H).

At the same time, in my other blogs, there are other synthetic methods of this type of compound,10201-73-7, 2-Amino-4-methoxypyridine, and friends who are interested can also refer to it.

Reference:
Patent; FORENDO PHARMA LTD; HIRVELAe, Leena; HAKOLA, Marjo; LINNANEN, Tero; KOSKIMIES, Pasi; STJERNSCHANTZ, Camilla; (182 pag.)WO2018/224736; (2018); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 153034-86-7, Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 153034-86-7, name is 2-Chloro-4-iodopyridine. A new synthetic method of this compound is introduced below.

Step 1: 2-CHLORO-4-TRIMETHYLSILANYLETHYNYL-PYRIDINE 2-Chloro-4-iodo-pyridine (10.0 g, 41.8 mmol) was dissolved in 200 mL of dry THF and 17.5 mL of triethyl amine. This mixture was evacuated and backfilled with argon several times to remove oxygen from the solution. Triphenylphosphine (329 mg, 1.25 mmol) and bis (triphenylphosphine) palladium (II) chloride (1.47 g, 2.09 mmol) were added and the reaction mixture was stirred at room temperature for lh. Copper (I) iodide (239 mg, 1.25 mmol) and trimethylsilylacetylene (6.28 g, 6.39 mmol) were added. The reaction mixture was stirred at room temperature overnight. The solvent was evaporated. The residue was taken up in 500 mL of water and extracted three times with ethyl acetate (500 mL each). The combined organic extracts were dried with magnesium sulfate, filtered and evaporated. The crude product was purified by chromatography on silica gel (cyclohexane/ethyl acetate 80: 20). The desired product was obtained as a light brown semi solid (10 g, >100%). This material was used without any further purification for the next step.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,153034-86-7, 2-Chloro-4-iodopyridine, and friends who are interested can also refer to it.

Reference:
Patent; F. HOFFMANN-LA ROCHE AG; WO2005/3117; (2005); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 53937-02-3, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 53937-02-3, name is 4-Benzyloxy-2-(1H)-pyridone. This compound has unique chemical properties. The synthetic route is as follows.

Al l. Preparation of intermediate I- 11; 1-11 A mixture of 4-benzyloxy-2(lH)-pyridone (0.100 g, 0.50 mmol), 2-bromo-5-iodotoluene (0223 g, 0.75 mmol), CuI (0.048 g, 0.25 mmol), N,N’-dimethylethylenediamine (0.053 ml, 0.5 mmol) and K3PO4 (0.212 g, 1.0 mmol) in dioxane/DMF (4/1) was heated for 15 minutes at 180 0C in a microwave oven. Then DCM was added. The solid was filtered off through a CELITE pad and to the filtrate, a 32 % NH3 solution was added. The organic layer was separated, washed with brine, dried (Na2SO4), filtered and the solvent was evaporated. The residue was purified by column chromatography over silica gel (eluent: DCM). The product fractions were collected and the solvent was evaporated. The residue was treated with DIPE to yield intermediate compound 1-11 (0.130 g, 70 %).

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 53937-02-3, 4-Benzyloxy-2-(1H)-pyridone.

Reference:
Patent; JANSSEN PHARMACEUTICA N.V.; WO2007/141200; (2007); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Electric Literature of 7356-60-7, As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 7356-60-7, name is Nicotinimidamide hydrochloride, molecular formula is C6H8ClN3, The compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.

3-(3,5-Dibromophenyl)-1-(4-pyridin-3-ylphenyl)-acetone 3-(3,5-Dibromo-phenyl)-1-(4-pyridin-3- Yl-phenyl)-propanone (34 g, 76.73 mmole), 3-Amidinopyridinium chloride (18.02 g, 11.43 mmole),Potassium phosphate (57g, 268.56mmole),And 340 ml of xylene was placed in a reaction flask and heated to maintain a reflux of 140 C.After the reaction is completed, the temperature is lowered to 90 C.After adding 100 ml of deionized water and stirring for 5 minutes, the water layer was removed.After concentrating the organic layer until the solid precipitates,The solid was washed with ethyl acetate and filtered to give a white solid.After drying, 22 g of white solid 4-(3,5-dibromophenyl)-2-pyridin-3-yl-6-(4-pyridin-3-ylphenyl)-pyrimidine (4-(3, 5-Dibromo-phenyl)-2-pyridin-3-yl-6-(4-pyridin-3-yl-phenyl)-pyrimidine),The yield was 52.69%.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 7356-60-7, Nicotinimidamide hydrochloride.

Reference:
Patent; E-ray Optoelectronics Technology Co Ltd; Huang, Heh Lung; Guo, Huang Ming; Chao, Teng Chih; Lin, Chi Jen; Chang, Min Jong; (53 pag.)TW2019/30287; (2019); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 19798-77-7 ,Some common heterocyclic compound, 19798-77-7, molecular formula is C5H5ClN2, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

General procedure: To a solution of substituted acetylsalicyloyl chlorides (0.022 mol) in anhydrous chloroform (100 mL) was added triethylamine (0.023 mol) at 4 C. After the mixture was stirred for 5-15 min and then substituted 4-amino pyridinewas added portion wise in the ice bath. After warmed to room temperature, the solution was stirred for 24-48 h and then quenched by 1 mL of 1 M hydrochloric acid. The reaction mixture was extracted with 10 % hydrochloric acid (50, 30and 30 mL) and the combined aqueous was basified to pH 7-9 with cooled saturated sodium bicarbonate solution. The yellow precipitation was filtered producing the crude products. After recrystallized in ethanol, the products were isolated as pure form in more than 85 % yields.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 19798-77-7, 4-Amino-3-chloropyridine, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Dian, He; Zhou, De-Bin; Mou, Jian-Ping; Yang, Zhu-Qing; Zhong, Jia; Ding, Xiao-Quan; Li, Chong; Wang, Xiao-Hong; Zhang, Jian-Gang; Asian Journal of Chemistry; vol. 26; 21; (2014); p. 7269 – 7275;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Adding a certain compound to certain chemical reactions, such as: 524955-09-7, 3-Chloro-4-(pyridin-2-ylmethoxy)aniline, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound, 524955-09-7, blongs to pyridine-derivatives compound. Application In Synthesis of 3-Chloro-4-(pyridin-2-ylmethoxy)aniline

A mixture of N-(4-chloro-3-cyano-7-(2-methoxyethoxy)quinolin-6-yl)acetamide (6.3g, 0.0197 mol, 1.00 equiv), 3-chloro-4-(2-pyridylmethoxy)aniline (4.7g, 0.0201mol, 1.00 equiv), methanesulfonic acid (0.7ml, 0.0108 mol) and ethanol (150 ml) was stirred under refluxed for 6 hours and then 0.6N hydrogen chloride (300 ml, 0.18 mol) was added. The mixture was heated to 80 0C for 19 hours, and then cooled to 0 0C to form precipitate. The precipitated solids were filtered and then added to a solution of IN potassium carbonate (100ml, O.lmol) in methanol (150ml) and then the mixture was stirred for 3 hours. The resulting mixture was filtered, washed with 1 : 1 methano I/water (300ml) and dried to give product 6.4g. MS (ESI) m/z: 475 (M+l).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,524955-09-7, its application will become more common.

Reference:
Patent; MEDOLUTION LIMITED; ZHANG, Dawei; WO2010/151710; (2010); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 571189-49-6 ,Some common heterocyclic compound, 571189-49-6, molecular formula is C10H16N4, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

General procedure: The mixture of intermediate d (0.5mmol), intermediate e (0.55mmol), Pd(OAc)2 (0.05mmol), X-phos or Xantphos (0.15mmol), Cs2CO3 (1.25mmol) and 1,4-dioxane or DME were refluxed under argon atmosphere for 1 h-4 h. The solvent was removed under reduced pressure and the residue was purified by silica gel column chromatography to produce title compound A or B.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles. 571189-49-6, 5-(4-Methylpiperazin-1-yl)pyridin-2-amine, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Zhang, Hao; Wang, Jin; Shen, Ying; Wang, Hui-Yan; Duan, Wei-Ming; Zhao, Hong-Yi; Hei, Yuan-Yuan; Xin, Minhang; Cao, Yong-Xiao; Zhang, San-Qi; European Journal of Medicinal Chemistry; vol. 148; (2018); p. 221 – 237;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem