Day: March 10, 2022

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.182344-56-5,2-Chloro-4-fluorobenzo[d]thiazole,as a common compound, the synthetic route is as follows.

EXAMPLE 107 [0545] Preparation of cis-(2S)-(-)-1-(4-Indolyioxy)-3-(4-(4-fluorobenzothiazol-2-yl)-2-methylpiperidin-1-yl)-2-propanol Oxalate. [CHEMMOL-00165] [0546] Preparation of 4-(4-Fluorobenzothiazol-2-yl)-1-(t-butyloxycarbonyl)-2-methyl-1,2,3,6-tetrahydropyridine [CHEMMOL-00166] [0547] Scheme IA, Step A: To a mixture of 2-chloro-4-fluorobenzothiazole (1.012 g, 5.39 mmol) in 1,4-dioxane (60 mL) was added 2-methyl-4-trifluoromethylsulfonyl-1-(t-butyloxycarbonyl)-1,2,3,6-tetrahydropyridine (1.956 g, 5.66 mmol), hexamethylditin (1.767 g, 5.39 mmol), tetrakis(triphenylphosphine)-palladium (0.312 g, 0.269 mmol) and lithium chloride (0.686 g, 16.2 mmol). The mixture was heated at reflux for 20 hours, then cooled to 20 C. and diluted with saturated potassium fluoride and ethyl acetate. The mixture was stirred for 2 hours then partitioned and the organic layer was washed with brine, dried over sodium sulfate and evaporated. The residue was chromatographed over silica gel (hexanes/50% ethyl acetate in hexanes gradient elution) to give the intermediate title compound as a yellow amorphous solid (1.227 g, 72%). FDMS m/e=349 (M++1).

182344-56-5, As the paragraph descriping shows that 182344-56-5 is playing an increasingly important role.

Reference：
Patent; Hansen, Marvin Martin; He, John Xiaoqiang; Honigschmidt, Nicholas Allan; Koch, Daniel James; Kohn, Todd Jonathan; Rocco, Vincent Patrick; Spinazze, Patrick Gianpietro; Takeuchi, Kumiko; US2004/6229; (2004); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.40283-41-8,2-Aminothiazole-4-carboxylic acid,as a common compound, the synthetic route is as follows.

Analogously to Example 44, from 2-aminothiazole-4-carboxylic acid and (RS)-glycyl-3-phenyl-beta-alanine ethyl ester hydrochloride there is prepared ethyl (RS)-3-[2-[(2-amino-thiazol-4-ylcarbonyl)-amino]-acetylamino]-3-phenyl-propionate; MS: 377 (M+H)+., 40283-41-8

As the paragraph descriping shows that 40283-41-8 is playing an increasingly important role.

Reference：
Patent; Hoffman-La Roche Inc.; US6100282; (2000); A;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

15448-99-4, 2-Methylbenzo[d]isothiazol-3(2H)-one 1,1-dioxide is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 17 Methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (I; Y=OCH3) In a manner similar to Examples 15 and 16, to a solution of 2.86 g. (50 mmoles) of N-methylsaccharin and 10.8 ml. (100 mmoles) of methyl chloroacetate in 17 ml. of dimethylsulfoxide was added 11.56 g. (170 mmoles) of sodium ethoxide in 63 ml. of dimethylsulfoxide over a period of 2.5 hours. The reaction mixture wwas added to 800 ml. of 0.25N hydrochloric acid, and the precipitated product filtered, washed with water and dried, 3.0 g., 15448-99-4

As the paragraph descriping shows that 15448-99-4 is playing an increasingly important role.

Reference：
Patent; Pfizer Inc.; US4483982; (1984); A;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.209459-11-0,Methyl 2-aminobenzo[d]thiazole-7-carboxylate,as a common compound, the synthetic route is as follows.

A.4.3 Synthesis of benzothiazole-7-carboxylic acid methyl ester; Isoamyl nitrite (22.0 mmol) is added to a solution of 2-amino-benzothiazole-7-carboxylic acid methyl ester (10.1 mmol) in THF (29 mL). The mixture is heated to reflux for 4h, the solvents are removed in vacuo and the residue is purified by flash chromatography (gradient: heptane to EtOAc/heptane 4/6) to give the desired product. LC-MS: tR = 0.85 min; [M+H]+ = 194.0.

209459-11-0, 209459-11-0 Methyl 2-aminobenzo[d]thiazole-7-carboxylate 10910742, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; ACTELION PHARMACEUTICALS LTD; WO2009/104155; (2009); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.3622-35-3,Benzo[d]thiazole-6-carboxylic acid,as a common compound, the synthetic route is as follows.

2-[(1-Benzothiazol-6-yl-methanoyl)-amino]-3-phenyl-propionic acid Benzothiazole-6-carboxylic acid (2h, 258 mg) is dissolved in dichloromethane (10 ml), and treated with 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (345 mg). The reaction is stirred for 10 minutes. 1-Hydroxybenzotriazole (244 mg) is added and the mixture is stirred for a further 10 minutes. L-Phenylalanine t-butyl ester hydrochloride (200 mg) is added and the reaction maintained at room temperature for 72 hours. The mixture is concentrated, the residue taken up in ethyl acetate and washed with water, sodium bicarbonate, and brine. The organic phase is dried (MgSO4), concentrated, and then purified by chromatography on silica (10% diethyl ether/DCM). This afforded the ester intermediate as a solid (60 mg).

3622-35-3, 3622-35-3 Benzo[d]thiazole-6-carboxylic acid 601670, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; The Procter & Gamble Company; US2004/6104; (2004); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica