Tag: M.W:100-200

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.

To a solution of the amine (220 mg, 0.927 mmol), 1,3-benzothiazole-6-carboxylic acid (184 mg, 1.03 mmol), EDCI hydrochloride (195 mg, 1.02 mmol), HOBT (140 mg, 1.04 mmol) in 6.0 mL of DMF was added N-methylmorpholine (0.3 mL, 2.73 mmol) and stirred at ambient temperature for 24 h. The reaction mixture was partitioned between 30 mL of water and 30 mL of ethyl acetate. The organic layer was washed with two 30 mL portions of 1N HCl solution, 30 mL of water, dried over sodium sulfate, filtered, concentrated and purified by column chromatography (methanol/methylene chloride, 3:97) to give 297 mg of the product as a white solid. Yield: 80%, MS: 399 (M+H+), mp=199.6-201.2 C., 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; Bamberg, Joe Timothy; Gabriel, Tobias; Krauss, Nancy Elisabeth; Mirzadegan, Taraneh; Palmer, Wylie Solang; Smith, David Bernard; US2004/77646; (2004); A1;,
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,15448-99-4

EXAMPLE 7 Methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (I; Y=OCH3) In a manner similar to Example 6, 864 mg. (0.036 mole) of 99% sodium hydride was added over a two hour period to a solution of 2.9 g. (0.015 mole) of N-methylsaccharin and 9.8 g. (0.09 mole) of methylchloroacetate in 10 ml. of dimethylsulfoxide at 40 C. Stirring was continued at 40-45 C. for an additional two hours, and the reaction mixture was poured into 150 ml. of 5% hydrochloric acid solution. The precipitate was filtered and dried to give 3.07 (76%) of the desired product.

15448-99-4 2-Methylbenzo[d]isothiazol-3(2H)-one 1,1-dioxide 27290, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Pfizer Inc.; US4376204; (1983); A;; ; 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.15448-99-4,2-Methylbenzo[d]isothiazol-3(2H)-one 1,1-dioxide,as a common compound, the synthetic route is as follows.

EXAMPLE 16 Methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (I; Y=OCH3) To a solution of 9.86 g. (50 mmoles) of N-methylsaccharin and 10.8 ml. of methyl chloroacetate (123.8 mmoles) in 50 ml. of dimethylsulfoxide was added at the rate of 0.15 ml./minute 9.2 g. (170 mmoles) of sodium methoxide in 30 ml. of methanol. After the addition was complete an additional 2.7 g. (50 mmoles) of sodium methoxide in 11 ml. of methanol was added at the same rate for a total addition time of about 6 hours. The reaction mixture was added to 800 ml. of 0.25N hydrochloric acid, and the precipitated product filtered, washed with water and dried, 3.8 g., 15448-99-4

The synthetic route of 15448-99-4 has been constantly updated, and we look forward to future research findings.

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.42270-37-1,2-(Piperazin-1-yl)thiazole,as a common compound, the synthetic route is as follows.,42270-37-1

6.11. Preparation of f3′-Chloro-biphenyl-4-yl)-f4-thiazol-2-yl-piperazin-l- vl)-methanone; To a solution of l-(thiazol-2-yl)piperazine (ca. 0.915 mmol, prepared from 150 mg 2-bromothiazole according to the methods described in Astles et al., J. Med. Chem., 39: 1423-1432 (1996)), 3′-chloro-biphenyl-4-carboxylic acid (212.9 mg, 0.915 mmol) in CH2Cl2 (4 ml), was added EDC (209.7 mg, 1.098 mmol) and HOBt (148.2 mg, 1.098 mmol). After being stirred overnight, the mixture was treated with EtOAc (50 ml) and water (15 ml). The organic phase was washed with brine (5 ml), dried (MgSO4), filtered, and concentrated under reduced pressure to furnish the crude product. This material was purified by column chromatography (20% acetone/hexanes) to give the title compound (225 mg, 64% for two steps) as a white solid: 1H NMR (CDCl3, 400 MHz) delta 7.64-7.23 (m, 9 H), 6.65 (t, J= 3.6 Hz, 1 H), 4.92 (m, br, 2 H), 3.57 (m, br, 6 H), 3.68 (m, 2 H), 2.14 (m, 2 H), 1.83 (m, 2 H); MS calc’d for C20Hi9ClN3OS [M+H]+: 384; Found: 384.

42270-37-1 2-(Piperazin-1-yl)thiazole 911806, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; LEXICON PHARMACEUTICALS, INC.; WO2008/67121; (2008); A2;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

943-03-3,943-03-3, 6-Methoxybenzo[d]thiazole-2-carbonitrile is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: The methoxycarbonitrile derivative (1 eq) was mixed with pyridinium chloride (5 eq) under argon and heated to 210°C for 30 minutes. The resulting mixture was partitioned between distilled water and dicloromethane, and the organic layers were concentrated under vacuum. The crude product was dissolved in 5 percent Na2CO3 (50 ml) and filtered before addition of HCl until pH ?4.0. The aqueous layer was extracted with dichloromethane (50 mL) and the organic layers removed under vacuum yielding pure product (>98percent).

The synthetic route of 943-03-3 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Rothweiler, Ulli; Eriksson, Jonas; Stensen, Wenche; Leeson, Frederick; Engh, Richard A.; Svendsen, John S.; European Journal of Medicinal Chemistry; vol. 94; (2015); p. 140 – 148;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

40283-41-8, 2-Aminothiazole-4-carboxylic acid is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To the solution of 4-sulfamoylbenzoic acid (200 mg, 0.53 mmol) inMeOH (8 mL) added SOCl2 (1348 muL, 1.84 mmol) at 0 C. The mixturewas stirred at 40 C for 2 h, and then concentrated. Ester (214 mg,1.00 mmol) and (Boc)2O (238 mg, 1.09 mmol) were dissolved in DCM(8 mL). Et3N (138 muL, 1 mmol) and DMAP (12.2 mg, 0.1 mmol) wereadded and the mixture was stirred at rt. for 1.5 h. The solution wasconcentrated and purified to afford methyl 4-(N-(tert-butoxycarbonyl)sulfamoyl)benzoate. DIBAL-H (2 mL, 2 mmol) was added slowly tomethyl benzoate (300 mg, 1.00 mmol) in DCM (8 mL) at -78 C and themixture was stirred at -78 C for 2 h. The reaction was quenched by MeOH (2 mL), and then warmed to 0 C and added 10% citric acidunder stirring. The mixture was extracted with DCM, and the organicswere washed, dried, concentrated and purified to afford 4-formylbenzenesulfonamide.Using 4-formylbenzenesulfonamide, thecompound 44 was obtained from 5 by the general procedure as above.To the solution of 44 (95 mg, 0.20 mmol) in DCM (4 mL) added TFA(300 muL, 0.04 mmol). The mixture was stirred at rt. for 1 h. The solutionwas adjusted to pH 7-8 by NaHCO3. The mixture was extracted withEA, and the organics were washed, dried, concentrated and purified toafford 17, 54% yield for five steps, 94.0% HPLC purity., 40283-41-8

The synthetic route of 40283-41-8 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Yang, Lingling; Chen, Yang; He, Junlin; Njoya, Emmanuel Mfotie; Chen, Jianjun; Liu, Siyan; Xie, Congqiang; Huang, Wenze; Wang, Fei; Wang, Zhouyu; Li, Yuzhi; Qian, Shan; Bioorganic and Medicinal Chemistry; vol. 27; 6; (2019); p. 1087 – 1098;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

167366-05-4, 4-Bromo-2-formylthiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

N-((4-bromothiazol-2-yl)methyl)cyclopropanamine 4-bromothiazole-2-carbaldehyde (2.5 g, 13 mmol) was dissolved in tetrahydrofuran (65 mL) and cyclopropylamine (3.72 mL, 53.7 mmol) and sodium triacetoxyborohydride (11.4 g, 53.7 mmol) added. The reaction mixture was stirred 20 h at RT and then hydrolyzed at 0 C. with sat. sodium hydrogencarbonate sol. (150 mL). The product was extracted with ethyl acetate (2*300 mL) and the organic phase dried. (Yield: 3.0 g, 97%), 167366-05-4

167366-05-4 4-Bromo-2-formylthiazole 2763187, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Gruenenthal GmbH; US2009/69320; (2009); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

939-69-5,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.939-69-5,6-Hydroxybenzo[d]thiazole-2-carbonitrile,as a common compound, the synthetic route is as follows.

Example 4 Synthesis of Compounds 4 and 13 2-Cyano-6-t-butyldiphenylsiloxy-benzothiazole. A solution of 2-cyano-6-hydroxybenzothiazole (5.0 g, 28 mmol) in 100 ml of anhydrous DMF under inert atmosphere was treated with 2.9 g of imidazole (4.2 mmol) followed by t-butyldiphenylchlorosilane (9.34 g, 34 mmol). The reaction was stirred at room temperature for 3 h and then diluted with 200 ml of ethyl acetate and washed with water (4*400 ml). The organic layer was dried over sodium sulfate and concentrated under reduced pressure. The crude product was purified by column chromatography, eluding with 5-10percent ethyl acetate/hexanes to afford 13.0 g of the desired product containing ~10percent silyl impurity in quantitative yield. The product was taken on without further purification. 1 H NMR (CDCl3): delta1.12 (s, 9H); 7.13-7.46 (m, 8H); 7.70-7.72 (m, 4H); 7.92-7.95 (d, 1H).

As the paragraph descriping shows that 939-69-5 is playing an increasingly important role.

Reference：
Patent; Lumigen, Inc.; US5965736; (1999); 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.14779-17-0,2-Amino-5-methylbenzothiazole,as a common compound, the synthetic route is as follows.

General procedure: To a 10 mL round bottom flask was added 0.5 mmolof the amine and 0.1 mL of acetic anhydride. The reactionis instantaneous and exothermic, and after 10 s the solidproduct formed was filtered and washed with cold water.When no solid was immediately formed, 4 mL of coldwater was added, and the mixture allowed standing ina refrigerator for 24 h, leading to precipitation. To allsynthesized acetamides, measured physical data were inagreement to the reported values.17-19,27,31,32

14779-17-0, As the paragraph descriping shows that 14779-17-0 is playing an increasingly important role.

Reference：
Article; Cunha, Silvio; De Santana, Lourenco L. B.; Journal of the Brazilian Chemical Society; vol. 28; 6; (2017); p. 1137 – 1144;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

42270-37-1,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.42270-37-1,2-(Piperazin-1-yl)thiazole,as a common compound, the synthetic route is as follows.

EXAMPLE 50B 1-phenyl-3-[4-(1,3-thiazol-2-yl)piperazin-1-yl]propan-1-one 3-Chloropropiophenone (8 g, 47.44 mmol), the product from Example 50A (8.83 g, 52.18 mmol), and K2CO3 (6.56 g, 47.44 mmol) were combined in DMF and heated at 35 C. for 16 hours. The mixture was allowed to cool to room temperature, diluted with water, and extracted with ethyl acetate. The ethyl acetate extract was dried over anhydrous Na2CO3, filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, 1:1 ethyl acetate:hexanes) to provide the title compound. 1H NMR (300 MHz, CDCl3) delta 2.65 (br.s, 4H), 2.95 (br.s, 2H), 3.22 (br.s. 2H), 3.22 (br.s, 2H), 3.45 (br.s, 4H), 6.45 (d, J=3 Hz, 1H), 7.2 (d, J=3 Hz, 1H), 7.45 (m, 2H), 7.6 (m,1H), 7.9 (m, 2H); MS (DCI/NH3) m/z 302 (M+H)+. Anal. calcd for C16H19N3OS: C, 63.76; H, 6.35; N, 13.94. Found: C, 61.50; H, 6.43; N, 13.21.

42270-37-1 2-(Piperazin-1-yl)thiazole 911806, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Kolasa, Teodzyj; Patel, Meena; Mortell, Kathleen H.; Matulenko, Mark A.; Hakeem, Ahmed A.; Bhatia, Pramila A.; Wang, Xueqing; Daanen, Jerome F.; Latshaw, Steven P.; Stewart, Andrew O.; US2005/176727; (2005); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica