Heterocyclic Building Blocks-Thiazole

3622-38-6, 2-Chloro-5-nitrobenzo[d]thiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Reference Example 62 In 7.4 ml of tetrahydrofuran was dissolved 160 mg of 2-chloro-5-nitro-1,3-benzothiazole, and thereto was added 1.86 ml of a 1M dimethylamine tetrahydrofuran solution, followed by 16.5 hours of stirring. Water was added to the reaction solution and the organic layer was extracted with ethyl acetate. After the organic layer was dried over anhydrous sodium sulfate, the solvent was removed by evaporation. The obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate) to obtain 173 mg of N,N-dimethyl-5-nitro-1,3-benzothiazol-2-amine as a yellow solid.

3622-38-6, The synthetic route of 3622-38-6 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Astellas Pharma Inc.; EP1632477; (2006); A1;,
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

2941-58-4, 2-Bromo-6-methoxybenzothiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

2-bromo-6- methoxybenzo[d]thiazole (0.90 g; 3.7 mmol) was dissolved in CH2CI2 (50 mL). BBr3 (1M in CH2C12, 16 mL, 16 mmol) was added slowly. White precipitate formed immediately. After overnight, HPLC showed complete conversion. Excess CH2CI2 (200 mL) and brine (100 mL) were added. White precipitate formed immediately. The mixture was stirred at RT for 2 hours, until most solid dissolved. The organic layer was separated, and aqueous layer extracted with 2 x 100 mL CH2CI2. The combined organic solution was dried over MgS04. The solvent was removed to afford 0.71 g of product. Yield 83%., 2941-58-4

As the paragraph descriping shows that 2941-58-4 is playing an increasingly important role.

Reference：
Patent; THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY, DEPARTMENT OF HEALTH AND HUMAN SERVICES; CAI, Lisheng; PIKE, Victor W.; WO2013/40183; (2013); A1;,
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.30132-15-1,2-(2-Aminobenzo[d]thiazol-6-yl)acetic acid,as a common compound, the synthetic route is as follows.

B. To prepare the intermediate methyl (2-amino-benzothiazol-6-yl)acetate, 2 mL concentrated H2SO4 was added dropwise to a solution of (2-amino-1,3-benzothiazol-6-yl)acetic acid (7.89 g, 37.9 mmol) in 200 mL methanol and the reaction mixture was heated at 50 C. for 90 minutes. After evaporation of most of the methanol, dichloromethane (150 mL) was added and the mixture was neutralized with saturated NaHCO3 solution. The aqueous phase was extracted with dichloromethane. The organic extracts were combined, dried over MgSO4, and concentrated to give the product as a yellow solid (6.51 g, 77%). 1H NMR (DMSO-d6) delta 7.54 (s, 1H), 7.44 (br, 2H), 7.27 (d, 1H), 7.09 (d, 1H), 3.66 (s, 2H), 3.61 (s, 3H); LC-MS: ESI 223 (M+H)+., 30132-15-1

30132-15-1 2-(2-Aminobenzo[d]thiazol-6-yl)acetic acid 757163, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Bhagwat, Shripad; Chao, Qi; Grotzfeld, Robert M.; Patel, Hitesh K.; Sprankle, Kelly G.; US2007/232604; (2007); A1;,
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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;,
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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;,
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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

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

To a solution of compound 120 (1 g, 6.93 mmol) in DMF (50 mL) was added compound121 (0.97 g, 7.73 mmol), DIPEA (3.5 mL, 21.1 mmol) and HATU (2.93 g, 7.7 mmol). Theresultingsolution was stirred at room temperature overnight. The reaction solution was evaporatedin vacuo at 85oC to dryness which was treated with 30mL of THF, and stirred at room temperature for about 0.5 hour, then filtered, washed with a little of ethanol and dried to give compound122 (0.7 g, 46.9%) as a yellow solid. 1H NMR (300 MHz, DMSO): 8 8.07 (t, 1H, J = 6.0 Hz),7.22 (s, 1H), 7.12 (brs, 1H), 3.97(d, 2H, J = 6.0 Hz), 3.64 (s, 3H).Preparation of [ (2-{3-[2-(3-tert-butoxycarbonylamino-propoxy, 40283-41-8

40283-41-8 2-Aminothiazole-4-carboxylic acid 1501882, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; F. HOFFMANN-LA ROCHE AG; GOODNOW JR., Robert Alan; HAMILTON, Matthew Michael; KOWALCZYK, Agnieszka; SIDDURI, Achyutharao; WO2013/110578; (2013); 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.118452-02-1,2-Aminothiazole-4-carboxamide,as a common compound, the synthetic route is as follows.

To a solution of 2-(S)-(2-tert-butoxycarbonylamino-2-phenyl-acetylamino)-3-phenyl-propionic acid (239 mg, 0.6 mmol) and 2-amino-thiazole-4-carboxylic acid amide (71.5 mg, 0.5 mmol) in N,N-dimethylformamide (5 mL) was added diisopropylethylamine (174 muL, 9.99 mmol) and O-benzotriazol-1-yl-N,N,N’,N’-tetramethyluronium hexaflurorophosphate (455 mg, 1.2 mmol) and the mixture stirred at ambient temperature overnight. The reaction was quenched with saturated aqueous ammonium chloride solution (10 mL), the mixture poured into water (50 mL) and extracted with ethyl acetate (3×20 mL). The combined organic extracts were washed with water (3×10 mL), brine (20 mL), dried over sodium sulfate and concentrated in vacuo. The residue was purified by chromatography over silica gel eluted with ethyl acetate to give {[1-((S)-4-carbamoyl-thiazol-2-ylcarbamoyl)-2-phenyl-ethylcarbamoyl]-phenyl-methyl}-carbamic acid tert-butyl ester as a glassy solid (31 mg, 12%). LR-MS: Obs. Mass, 524.25. Calcd. Mass, 524.1967 (M+H)., 118452-02-1

As the paragraph descriping shows that 118452-02-1 is playing an increasingly important role.

Reference：
Patent; Goodnow,, Robert Alan; Huby, Nicholas J.S.; Kong, Norman; McDermott, Lee Apostle; Moliterni, John Anthony; Zhang, Zhuming; US2006/63814; (2006); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica