Category: thiazole

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.

General procedure: GP4-1: A mixture of substituted2-chlorobenzothiazole (1.0eq), N-Bocpiperazine (1.05 eq) and Na2CO3 (1.2 eq) inDMF (10 volume) was heated up at 100 0C for hours, the process ofwhich was monitored by TLC. The mixture was diluted by EA and added by water.After extraction by EA (2 times), the collected organic layers were washed by10% citric acid, and then brine, dried over Na2SO4 andconcentrated to give crude product, which could be used directly withoutfurther purification.GP4-2: N-Bocprotected amine in DCM (5 volume) was added by TFA (2.5 volume). The mixturewas stirred at rt for four hours and monitored by TLC. After consumption ofstarting material, volatile solvent was removed under reduced pressure and theresidue was neutralized by saturated Na2CO3 solution toobtain the slurry, which was extracted by 10% methanol in DCM (3 times). Theorganic layers were collected, dried and concentrated to give the desired freeamine, for direct use for next step.GP4-3: Free amine (1.0 eq) suspendedin DCM (10 volume) was added by aldehyde (1.1 eq) under N2atmosphere. The mixture was stirred at rt 15 min. Then trimethylsilylazide (TMSN3, 1.1 eq) was added, and stirring was kept foranother 15 min, followed by addition of isonitrile (1.0 eq). The mixture wasstirred at for 12 h. After removal of solvent, the residue was purified bypreparative TLC (DCM/MeOH as eluent) to give the product, which could bere-purified by trituration with ether., 182344-56-5

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

Reference：
Article; Lv, Fengping; Li, Zhi-Fang; Hu, Wenhao; Wu, Xiaohua; Bioorganic and Medicinal Chemistry; vol. 23; 24; (2015); p. 7661 – 7670;,
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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.14527-44-7,Methyl thiazole-5-carboxylate,as a common compound, the synthetic route is as follows.

Step 1: Sodium 2-cyano-1-(1,3-thiazol-5-yl)ethenolate A solution of 1.5 g (10.5 mmol) of methyl 1,3-thiazole-5-carboxylate and 430 mg (10.8 mmol) of acetonitrile in 15 ml of THF was added dropwise to a suspension of 419 mg of sodium hydride (60% strength suspension in mineral oil) in 16 ml of THF which was heated under reflux. The reaction mixture was heated under reflux for 20 h. After cooling, 50 ml of methyl tert-butyl ether were added and the mixture was stirred for 30 minutes. The resulting precipitate was filtered off with suction through a frit and dried under oil pump vacuum. This gave 1.71 g (94% of theory) of the title compound which was combined with the product (3.48 g, 95% of theory) from a second batch starting with 3.0 g (21 mmol) of methyl 1,3-thiazole-5-carboxylate.

14527-44-7, As the paragraph descriping shows that 14527-44-7 is playing an increasingly important role.

Reference：
Patent; BAYER INTELLECTUAL PROPERTY GMBH; SUessMEIER, Frank; LOBELL, Mario; GRUeNEWALD, Sylvia; HAeRTER, Michael; BUCHMANN, Bernd; TELSER, Joachim; JOeRIssEN, Hannah; HEROULT, Melanie; KAHNERT, Antje; LUSTIG, Klemens; LINDNER, Niels; US2013/190290; (2013); A1;,
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5198-79-8, 2-Chloro-4-formylthiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A solution of 2,3-diamino-1,4-naphthoquinone (1.0 mmol),appropriate aromatic aldehyde (1.0 mmol) with sodium pyrosulfitein DMF was stirred at 120 C overnight. On completion of the reactionmonitored by TLC, the solvent was evaporated and the residuewas purified by silica gel chromatography by DCM/MeOHsystem to afford the final product. If necessary, the crude productcould be recrystallized in methanol or DMSO to afford pure sample.4.1.5.1. 2-(2-Chlorophenyl)-1H-naphtho[2,3-d]imidazole-4,9-dione(T1). Pale yellow solid; yield 80%;, 5198-79-8

As the paragraph descriping shows that 5198-79-8 is playing an increasingly important role.

Reference：
Article; Pan, Liangkun; Zheng, Qiang; Chen, Yu; Yang, Rui; Yang, Yanyan; Li, Zhongjun; Meng, Xiangbao; European Journal of Medicinal Chemistry; vol. 157; (2018); p. 423 – 436;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.3034-53-5,2-Bromothiazole,as a common compound, the synthetic route is as follows.

0.15mol containing a solution of 2-bromothiazole added dropwise to a solution containing 0.18mol butyllithium was added dropwise for about 2h, after the addition was completed, stirring was continued for 1h, maintained at low temperature (-78 deg.] C) reaction carried out under . 0.3mol ethyl acetate and then added to the solution dropwise addition was completed, stirring was continued for 3h, the reaction is complete, the organic phase extracted was allowed to stand, washed with distilled water, dried over anhydrous Na2SO4 was added, and then distilled under reduced pressure collecting bp89 ~ 91 / 1.6kPa fraction, 2-acetyl thiazole 18.16g. The yield was 95.2%., 3034-53-5

3034-53-5 2-Bromothiazole 76430, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Wutong Aroma Chemicals Co. Ltd.; Li, Xin; Sun, Bin; Wei, Jie; Wang, Xiaodong; Zhao, Leizhen; Zang, Chuanjin; Zi, Yanyan; Liu, Yuanwu; Gao, Ming; (8 pag.)CN105348216; (2016); A;,
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167366-05-4, 4-Bromo-2-formylthiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a rb flask with an attached Dean-Stark trap containing molecular sieves, 4A (0.25g) was added 4-bromothiazole-2-carbaldehyde (4.4 g, 22.91 mmol). The starting material was dissolved in Benzene (45 ml) and Ethylene glycol (1.406 ml, 25.2 mmol) was added followed by pTsOH (0.218 g, 1.146 mmol). The mixture was heated to reflux for 3 h. The mixture was cooled to rt, and was partitioned with sat. aq. NaHCO3. The mixture was washed 2* with sat. NaHCO3 (40 mL), then once with sat. NaCl (40 mL). The organic layer was dried with Na2SO4. The drying agent was removed by filtration, and the mixture was concentrated under reduced pressure. The residue was purified by biotage flash chromatography using a 40+M column and a 0 to 20% EtOAc in hexanes gradient. The product, 4-bromo-2-(1,3-dioxolan-2-yl)thiazole (5.1 g, 21.60 mmol, 94% yield), was collected as a light-yellow oil. To a solution of 4-bromo-2-(1,3-dioxolan-2-yl)thiazole (5.09 g, 21.56 mmol) in Toluene (100 ml) was added Hexamethylditin (10 g, 30.5 mmol) followed by Tetrakis (2.491 g, 2.156 mmol). The mixture was attached to a reflux condenser, and was flushed with N2. The mixture was heated to 100 C. for 4 h. The mixture was cooled to rt, and was loaded onto a 40+M biotage cartridge that was pre-saturated with hexanes with 0.1% Et3N. The desired product was purified using a 0-20% EtOAc in hexanes with 0.1% Et3N gradient. After concentrating in vacuo, the product, 2-(1,3-dioxolan-2-yl)-4-(trimethylstannyl)thiazole (4.64 g, 14.50 mmol, 67.3% yield), was isolated as a light-yellow oil. LCMS: m/e 322.0 (M+H)+, ret time 2.23 min (method 7); 1H NMR (500 MHz, CDCl3) delta ppm 7.39 (s, 1H) 6.20 (s, 1H) 4.03-4.20 (m, 4H) 0.27-0.42 (m, 9H)., 167366-05-4

As the paragraph descriping shows that 167366-05-4 is playing an increasingly important role.

Reference：
Patent; Bristol-Myers Squibb Company; US2007/249579; (2007); A1;,
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Thiazole | chemical compound | Britannica

14542-13-3, 2-Methoxythiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a stirred solution of 2-methoxythiazole ( 5 g, 43.4 mmol) in tetrahydrofuran(THF) (50 mL) was added n-BuLi (35.3 mL, 56.4 mmol) and the contents stirred at -78 C.After 15 min, tributylchlorostannane (14.13 mL, 52.1 mmol) was added and the mixturestirred with warming to room temperature over a 3 h period. The reaction mixture wasquenched with water (20 mL) and the contents extracted with ether (25 mL ). The organic layer was separated and dried over anhydrous sodium sulphate, filtered, and the filtrateconcentrated in vacuo to afford the crude product (6 g). The crude product was purified bysilica gel column chromatography (eluent: 2% EtOAc/Hexane) to afford 2-methoxy-5-(tributylstannyl)thiazole (4 g, 22%) as yellow liquid. 1H NMR (400 MHz, CDCl3-d3) 8ppm 0.90-0.98 (m, 9H), 1.05-1.15 (m, 6H),1.30-1.40 (m, 6H), 1.50-1.65 (m, 6H), 4.04 (s, 3H), 7.03 (s, 1H). LCMS(ES) [M+Ht 405.99., 14542-13-3

14542-13-3 2-Methoxythiazole 575451, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; GLAXOSMITHKLINE LLC; BURGESS, Joelle, Lorraine; DUQUENNE, Celine; KNIGHT, Steven, David; MILLER, William, Henry; NEWLANDER, Kenneth, Allen; VERMA, Sharad, Kumar; WO2013/173441; (2013); A2;,
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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.

General procedure: tert-butyl (2S,3R)-3-hydroxy-4-(isobutylamino)-1-phenylbutan-2-ylcarbamate (6) (31.0 g) in dichloromethane was added to a solution of benzothiazole-6-carboxylic acid (1.05 eq), triethylamine (1.5 eq) and HATU (2-(7-aza-1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate, 1.05 eq) in dichloromethane (500 mL). The reaction mixture was stirred at room temperature overnight. Water was added and the phases were separated. The organic phase was three times washed with a saturated aqueous Na2CO3 solution, brine, dried with MgSO4 and concentrated under reduced pressure. The residue was purified by column chromatography (eluent: dichloromethane dichloromethane / methanol 95:5) to afford compound 8 quantitative.

3622-35-3, The synthetic route of 3622-35-3 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Jonckers, Tim H.M.; Rouan, Marie-Claude; Hache, Geerwin; Schepens, Wim; Hallenberger, Sabine; Baumeister, Judith; Sasaki, Jennifer C.; Bioorganic and Medicinal Chemistry Letters; vol. 22; 15; (2012); p. 4998 – 5002;,
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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.1094070-77-5,tert-Butyl (2-bromothiazol-5-yl)carbamate,as a common compound, the synthetic route is as follows.

Example 42 Preparation of di(tert-butyl) 2-bromo-1,3-thiazol-5-ylimidodicarbonate To a tetrahydrofuran (THF) (200 mL) solution of (2-bromo-thiazol-5-yl)-carbamic acid tert-butyl ester (19.8 g, 70.9 mmol) at 0 C (ice bath) was added NaH (3.12 g, 78 mmol, 60% dispersion in mineral oil) in one portion. Gas evolution was observed. The reaction was stirred for 30 minutes. (Boc)2O (17.0 g, 78 mmol) was added in one portion. The reaction was stirred for 5 minutes. The reaction vessel was pulled from the cooling bath and the reaction allowed to stir for 30 more minutes. Water and ethyl acetate were added to the reaction mixture. The layers were separated and the aqueous layer was extracted ethyl acetate (2 X). The combined organic layers were dried over MgSO4, filtered, and concentrated. Silica gel column chromatography (20 to 50% ethyl acetate/hexanes) afforded the final product as a white solid (25.0 g, 93% yield): mp 87-89 C; 1H NMR (300 MHz, CDCl3) delta 7.24 (s, 1H), 1.48 (s, 18H); ESIMS m/z 379, 381 (M+1)., 1094070-77-5

As the paragraph descriping shows that 1094070-77-5 is playing an increasingly important role.

Reference：
Patent; Dow AgroSciences, LLC; Trullinger, Tony; Hunter, Ricky; Garizi, Negar; Yap, Maurice; Buysse, Ann; Pernich, Dan; Johnson, Timothy; Bryan, Kristy; Deamicis, Carl; Zhang, Yu; Niyaz, Noormohamed; McLeod, CaSandra; Ross, Ronald; Zhu, Yuanming; Johnson, Peter; Eckelbarger, Joseph; Parker, Marshall; EP2604268; (2015); B1;,
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1011-40-1, 2-Phenylthiazole-5-carbaldehyde is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

2-phenyl-thiazole-5-carbaldehyde 41 (Silberg A. et al. Chem. Ber. 1964, 97, 1684-1687) (3.1 g, 16.4 mmol) was treated with malonic acid (2.4 g, 23.0 mmol), pyridine (3 mL) and piperidine (0.16 mL) and the mixture was heated at reflux for 6 hours before being cooled to room temperature. The mixture was then poured into water (50 mL) with stirring. The resulted yellow solid 42 was filtered, washed with water and air-dried (2.45 g). 1H NMR (400 MHz, d6-DMSO) delta: 6.25 (d, J=15.7 Hz, 1H), 7.53 (m, 3H), 7.78 (d, J=15.7 Hz, 1H), 7.97 (m, 2H), 8.23 (s, 1H).

1011-40-1, 1011-40-1 2-Phenylthiazole-5-carbaldehyde 2763706, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Tularik Inc.; US2004/97485; (2004); A1;,
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Thiazole | chemical compound | Britannica

31785-05-4, Ethyl 5-amino-2-methylthiazole-4-carboxylate is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 127; 5-Amino-2-methyl-thiazole-4-carboxylic acid (3-chloro-phenyl)-amide; The title compound was prepared as described in scheme 6. A) A solution of 5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (prepared as described in example 105, step A) (0.10 g, 0.54 mmol) in THF (2.5 ml) was treated with dimethylaminopyridine (DMAP) and di-tert-butyl dicarbonate (Boc2O). The mixture was irradiated in a microwave oven at 100 C. for 10 min, then the solvent was evaporated. The residue was purified by flash chromatography (heptane/ethyl acetate) yielding 2-tert-butoxycarbonylamino-5-methyl-thiophene-3-carboxylic acid ethyl ester (0.11 g, 70%) as a yellow oil; B) 5-Amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (0.40 g, 2.15 mmol) was dissolved in 20 ml dry THF. Di-tert.-butyl dicarbonate (0.526 g, 4.41 mmol) and 4-(N,N-dimethylamino)pyridine (0.036 g, 0.3 mmol) were added and the reaction mixture was stirred at 70 C. overnight. The solvent was evaporated, the residue taken up in 20 mL saturated sodium bicarbonate solution and extracted three times with ethyl acetate (30 mL each). The organic phases were pooled, dried with sodium sulfate and evaporated. The crude product was flash-chromatographed on silica gel with heptane/ethyl acetate 100:0?0:100 gradient to yield 5-tert-butoxycarbonylamino-2-methyl-thiazole-4-carboxylic acid ethyl ester as a light yellow solid (0.553 g, 90%)

31785-05-4, 31785-05-4 Ethyl 5-amino-2-methylthiazole-4-carboxylate 13329095, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Buettelmann, Bernd; Ceccarelli, Simona Maria; Jaeschke, Georg; Kolczewski, Sabine; Porter, Richard Hugh Philip; Vieira, Eric; US2006/160857; (2006); A1;,
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Thiazole | chemical compound | Britannica