Day: August 17, 2021

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 24484-93-3, name is Methyl 4-chloropicolinate. This compound has unique chemical properties. The synthetic route is as follows. Formula: C7H6ClNO2

Under nitrogen, tetrahydronfuran (10.86 kg) was added into a reactor (30 L). After the mixer was started, (N-(methyl-d3))amine hydrochloride (1.50 kg, 21.26 mol, 1.5 eq), methyl 4-chloropicolinate (2.43 kg, 14.16 mol, 1 eq) and anhydrous potassium carbonate (3.92 kg, 28.36 mol, 2 eq) were added in turn. The reaction was conducted at 33 C. for 15 h, and then pure water (12.20 kg) was added. The reaction mixture was extracted with methyl tert-butyl ether (3.70 kg×2). The organic phases were combined, dried over anhydrous sodium sulfate (0.50 kg) and stirred for 1 hour, and filtered. The solvents were removed under vacuum (?0.09 MPa) at 40±2C. with water bath to give the title compound («2.41 kg», purity 99.0%, yield «98%») as a light «yellow» oil.1H NMR(DMSO-d6, 400 MHz): delta7.64 (dd, J=2 Hz, 5.2 Hz, 1H), 7.97 (d, J=1.6 Hz, 1H), 8.54 (d, J=5.2 Hz, 1H), 8.74 (br, 1H). MS (ESL m/z) calcd. for C7H4D3ClN2O: 173, found:» 174 [M+H]+

With the rapid development of chemical substances, we look forward to future research findings about 24484-93-3.

Reference:
Patent; SUZHOU ZELGEN BIOPHARMACEUTICAL CO., LTD.; Feng, Weidong; Gao, Xiaoyong; Dai, Xiaojun; US2013/35492; (2013); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 144750-42-5, 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. 144750-42-5, name is (S)-2-(2-Chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetic acid hydrochloride, molecular formula is C15H15Cl2NO2S, 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.

Example 10: Preparation of methyl (S)-(+)-alpha -(2-chlorophenylV6,7- dihydrothieno[3,2-a]pyridine-5(4H)-acetate (formula (I): 41.8 g of (S)-(+)-alpha -(2-chlorophenyl)-6,7-dihydro-4Eta-thieno[3,2- c]pyridine-5(4H)-acetic acid hydrochloride obtained in Example 6 was suspended in 252 ml of dichloromethane, 0.94 ml of dimethylformamide was added thereto and cooled to -20 C . A mixture of 12.8 ml of oxalyl chloride and 84 ml of dichloromethane was slowly added thereto at below – 10 C over a period of 30 min, and then stirred at a temperature in the range of -10 to 0C for 2 hrs. A mixture of 24.6 ml of methanol and 84 ml of dichloromethane was added thereto over a period of 30 min, the resulting mixture was heated to room temperature and then stirred at the same temperature for 2 hrs. 170 ml of water was slowly added to the resulting solution, the pH was adjusted to 7.5 using saturated sodium bicarbonate to induce phase separation. The resulting organic layer was separated, washed with 150 ml of saturated sodium chloride, dried over anhydrous magnesium sulfate and concentrated under a reduced pressure, to obtain 37.1 g of the title compound as a yellow oil (yield: 95%), which was identical to that obtained in Example 7. optical purity : 98.5 % ee (HPLC)

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 144750-42-5, (S)-2-(2-Chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetic acid hydrochloride.

Reference:
Patent; HANMI PHARM. CO., LTD.; WO2006/137628; (2006); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

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. 6313-54-8, name is 2-Chloroisonicotinic acid. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C6H4ClNO2

To a solution of 2-chloroisonicotinic acid (3.08 g) in dichloromethane (60 mL) were added WSC/HCl (5.62 g), HOBt (4.5 g), N,O-dimethylhydroxyamine hydrochloride (2.9 g) and triethylamine (8.3 mL), and the mixture was stirred overnight. The reaction mixture was diluted with aqueous ammonium chloride solution, extracted with dichloromethane, dehydrated with sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=2/1) to give Compound II (3.51 g).

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, 6313-54-8, 2-Chloroisonicotinic acid.

Reference:
Patent; DAINIPPON SUMITOMO PHARMA CO., LTD.; US2012/225876; (2012); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.1824-81-3, name is 2-Amino-6-picoline, molecular formula is C6H8N2, molecular weight is 108.14, as common compound, the synthetic route is as follows.Recommanded Product: 1824-81-3

EXAMPLE 55 2-[(imidazo[1,2-a]pyridin-5-ylmethyl)thio]-1H-benzimidazole STR64 To a cold (ca. 0) solution of 86.4 g (0.88 mole) of 2-amino-6-methylpyridine and 101 g (0.96 mole) of triethylamine in 1.0 liter of dichloromethane was added dropwise a solution of 106.1 g (0.88 mole) of trimethylacetyl chloride in 100 ml of dichloromethane. After stirring an hour after addition was completed, the mixture was poured into water and the layers separated. The aqueous layer was extracted with dichloromethane. The organic layers were combined and washed with water, dried over magnesium sulfate, filtered, and concentrated in vacuo to an oil that crystallized upon standing. The solid was triturated with hexane and collected by filtration, giving 115 g of 2-(trimethylacetamido)-6-methylpyridine.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1824-81-3, 2-Amino-6-picoline, and friends who are interested can also refer to it.

Reference:
Patent; G. D. Searle & Co.; US4687775; (1987); A;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application of 98027-80-6, Adding some certain compound to certain chemical reactions, such as: 98027-80-6, name is 4-Bromo-2,6-dichloropyridine,molecular formula is C5H2BrCl2N, 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 98027-80-6.

To a de-gassed mixture of 3-CHLORO-4-FLUOROPHENYLBORONIC acid (77 mg, 0. 44 MMOL)), 4-bromo-2, 6-dichloro-pyridine (Talik and Plazek (1959) ROCZ. CHENT. 33 : 387-92 ; 100 mg, 0. 44 mmol), and 2M Na2CO3 (0. 55 MMOL), in DME (4mL) under nitrogen, add Pd (PPh3) 4 (0. 026 MMOL). Stir the mixture at 80C overnight, concentrate, and extract with EtOAc. Dry over NA2S04, concentrate under vacuum, and purify by preparative TLC (9 : 1 hexanes/EtOAc) to give 2, 3-DICHLORO-4- (3-CHLORO-4-FLUORO-PHENYL)-PYRIDINE.

According to the analysis of related databases, 98027-80-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; NEUROGEN CORPORATION; WO2005/7648; (2005); A2;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 55717-45-8, name is 6-Bromopyridin-3-ol, the common compound, a new synthetic route is introduced below. Application In Synthesis of 6-Bromopyridin-3-ol

[000570] Synthesis [000571] A mixture of 2 (579 mg, 3.46 mmol), 1 (500 mg, 2.89 mmol) and K2C03 (1.2 mg, 8.7 mmol) in 5 mL of DMF was stirred at 60 C for 16 hours. The reaction mixture was diluted with water (50 mL) and extracted with ethyl acetate (40 mL x 3). The combined organic phases were washed with water (50 mL), brine (50 mL), dried over anhydrous Na2SC>4 and filtered. The filtration was concentrated in vacuo, and the residue was purified by silica gel chromatography (ethyl acetate: petroleum ether = 10: 1) to give 3 as white solid (650 mg, yield: 85.5%). LC-MS m/z: 266.0 [M+H]+. LC-MS Purity (254 nm): > 81%; tR= 1.964 min.

The synthetic route of 55717-45-8 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; DANA-FARBER CANCER INSTITUTE, INC.; BRADNER, James; ERB, Michael; QI, Jun; (96 pag.)WO2016/196879; (2016); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthetic Route of 14667-47-1 ,Some common heterocyclic compound, 14667-47-1, molecular formula is C7H8N2O2, 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 methyl 2-amino-4-chlorobenzoate (300 mg, 1.6 mmol) and ethyl 2-phenoxyacetate (320 mg, 1.8 mmol) in anhydrous THF (9 mL) was added KHMDS (4.8 mL, 1.0 M in THF, 4.8 mmol) in one portion with vigorous stirring under a nitrogen atmosphere. The reaction mixture was stirred at rt until completion of the reaction (10 min) then MeOH was added. The reaction mixture was concentrated under reduced pressure and the resulting residue was taken up in water and acidified with 1 N HCl until precipitation occurred. The precipitate was filtered, washed with EtOH then dried to give 7-chloro-4-hydroxy-3-phenoxyquinolin-2(1H)-one (Table 2, entry 1) as a pale pink powder (449 mg, 92%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,14667-47-1, its application will become more common.

Reference:
Article; Toum, Jerome; Moquette, Alexandre; Lamotte, Yann; Mirguet, Olivier; Tetrahedron Letters; vol. 53; 15; (2012); p. 1920 – 1923;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Related Products of 89937-77-9, Adding some certain compound to certain chemical reactions, such as: 89937-77-9, name is Methyl 1,2-dihydro-2-oxopyridine-4-carboxylate,molecular formula is C7H7NO3, 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 89937-77-9.

To a mixture of crude IS (2 g, 13.1 mmol), phenylboronic acid (1.93 g, 15.7 mmol), TEA (2.64 g, 26.1 mmol), Py (2.07 g, 26.1 mmol) in DCM (20 mL) is added Cu(OAc)2 (3.56 g, 19.6 mmol). After reacting at room temperature overnight under oxygen, the mixture is filtered, concentrated, and purify by silica gel column chromatography (MeOH:DCM = 1 :50) to give 16 as a yellow solid (2.3 g, 77% yield), (MS: | VI · H | 230.1)

According to the analysis of related databases, 89937-77-9, the application of this compound in the production field has become more and more popular.

Reference:
Patent; IMMUNE SENSOR, LLC; THE BOARD OF REGENTS OF THE UNIVERSITY OF TEXAS SYSTEM; ZHONG, Boyu; SUN, Lijun; SHI, Heping; LI, Jing; CHEN, Chuo; CHEN, Zhijian; (270 pag.)WO2017/176812; (2017); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 138-60-3, With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.138-60-3, name is 4-Oxo-1,4-dihydropyridine-2,6-dicarboxylic acid, molecular formula is C7H5NO5, molecular weight is 183.1183, as common compound, the synthetic route is as follows.

4-hydroxypyridine-2,6-dicarboxylic acid monohydrate(5.0 g, 27.3 mmol) and o-phenylenediamine (6.49 g,58.7 mmol) were suspended in phosphoric acid (85%,55 mL). The mixture was kept at around 200 C for 6 hwith vigorous stirring. After cooling to room temperature,the mixture was poured into ice-water (300 mL), and thewhite color precipitate was filtered off and added to hot 10%aqueous Na2CO3solution (350 mL). The resulting light bluesolid was filtered off and added to hot methanol saturatedwith Na2CO3.The suspending solution was filtered off anddiluted with water (100 mL) and acidified with 15% hydrochloricacid to pH 1. The white precipitate was filtered offand extracted several times with boiling methanol. The collectedextracts were evaporated until precipitation began.The color-less product was filtered and dried under vacuum;yield: 4.0 g (48%); light-yellow color solid.

The chemical industry reduces the impact on the environment during synthesis 138-60-3, I believe this compound will play a more active role in future production and life.

Reference:
Article; Tsutsumi, Mayu; Kobayashi, Fumiya; Ohtani, Ryo; Nakamura, Msaaki; Hayami, Shinya; Journal of Inclusion Phenomena and Macrocyclic Chemistry; vol. 94; 3-4; (2019); p. 183 – 188;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reference of 934266-82-7, 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 934266-82-7, name is 5-Bromothiazolo[5,4-b]pyridin-2-amine. This compound has unique chemical properties. The synthetic route is as follows.

Step B: 4-acetylbenzoyl chloride (3B, 560 mg, 1.0 equivalent) was dissolved in DMA (0.15 M). Methyl 4-(chlorocarbonyl)benzoate (2.0 equivalent) was then added. The mixture was heated to 50 C. for 12 h, followed by addition of water and extraction with EtOAc twice. The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo. The crude product was purified by chromatography (SiO2, gradient of 5 to 20% EtOAc/Hex) to give 3C (16%) as a tan solid: 1H NMR (400 MHz, DMSO-d6) delta ppm 2.66 (s, 3 H) 7.73 (d, J=8.59 Hz, 1H) 8.08-8.17 (m, 3H) 8.25 (d, J=8.84 Hz, 2H) 13.36 (br. s., 1H); ESI-MS: m/z 376.0 (M+H)+.

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 934266-82-7, 5-Bromothiazolo[5,4-b]pyridin-2-amine.

Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; US2009/318425; (2009); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem