Heterocyclic Building Blocks-Thiazole

14527-44-7, Methyl thiazole-5-carboxylate is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

10231] Procedure:10232] Pd(OAc)2 (3.9 mg, 0.017 mmoles), [P(t-13u)3H] HF4 (10.0mg, 0.035 mmoles), 1-adamantanecarboxylic acid (18.4 mg, 0.10 mmoles), K2C03 (96.5 mg, 0.70 mmoles), methyl thiazole-5-carboxylate (50 mg, 0.35 mmoles), and methyl 6-bromonicotinate (113 mg, 0.52 mmoles) were added to a dried flask. The flask was fitted with a reflux condenser capped with a septum, evacuated, and purged with nitrogen (.-5 times). Dry toluene (1.7 mE) was added via syringe, and the reaction was stirred at 110 C. for 48 h. The reaction mixture was cooled and filtered through Celite, and the filtrate was concentrated under reduced pressure. The crude product was then purified by chromatography on silica (3% acetone in 1:1 DCMlhexanes) to afford the title compound (28 mg, 29%) as a white solid. ?H NMR (400 MHz, CDC13) 0 9.22 (s, 1H), 8.51 (s, 1H), 8.43 (dd, J=2.0, 8.0 Hz, 1H), 8.29 (d, J=8.0 Hz, 1H), 4.00 (s, 3H), 3.96 (s, 3H); ?3C NMR (100 MHz, CDC13) 0 172.7, 165.1,161.8, 153.6, 150.9, 149.7, 138.4, 131.7, 127.1, 119.6, 52.6, 52.6; HRMS (ESI) m/z 279.0439 [calc?d for C,2H,,N204S (M+H) 279.0435].10233] For experiments with mammalian cells, this compound was recrystallized from EtOAc to afford a whitecrystalline solid., 14527-44-7

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

Reference：
Patent; WISCONSIN ALUMNI RESEARCH FOUNDATION; RAINES, Ronald T.; Vasta, James; (50 pag.)US2016/280701; (2016); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

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

943-03-3, Pyridinium chloride (19.5 g) was added to 6-methoxybenzo [d] thiazole-2-carbonitrile (766 mg, 4.03 mmol) under argon atmosphere at room temperature. The obtained mixture was heated to 200 ° C. under an argon atmosphere to melt the pyridinium chloride and then stirred at 200 ° C. for 1 hour.The reaction mixture was allowed to cool to room temperature, 2 M hydrochloric acid (250 mL) was added, and the mixture was further extracted with ethyl acetate (3 × 100 mL). The combined organic layer was dried over anhydrous sodium sulfate, and then the solvent was distilled off under reduced pressure. The resulting residue was purified by silica gel column chromatography (silica gel 85 g; hexane-ethyl acetate (1: 1)) to give 6-hydroxybenzo [d] thiazole-2-carbonitrile

As the paragraph descriping shows that 943-03-3 is playing an increasingly important role.

Reference：
Patent; KEIO UNIVERSITY; SAITOH, TSUYOSHI; NISHIYAMA, SHIGERU; IOKA, SHUJI; MAKI, SHOJIRO; NIWA, HARUKI; (19 pag.)JP6095208; (2017); B2;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

59418-09-6,59418-09-6, Methyl 4-thiazolecarboxylate is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: Under nitrogen atmosphere, a sealable reaction tube equipped with a magnetic stirrer bar was charged with azole (0.50 mmol), sodium arylsulfinate (1.0 mmol), Pd(OAc)2 (0.025 mmol), Cu(OAc)2 (1.0 mmol), CF3COOH (0.50 mmol), and dimethylglycol (2.0 mL). The rubber septum was then replaced by a Teflon-coated screw cap, and the reaction vessel placed in an oil bath at 120 C for 24 h. After the reaction was completed, it was cooled to room temperature and the mixture was treated with K2CO3 solution (1.0 mol/L, 3.0 mL), then extracted with ethyl acetate. The resulting solution was dried by Na2SO4 then concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel (eluant: petroleum ether/ethyl acetate=12:1, v/v) to give the desired product.

The synthetic route of 59418-09-6 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Wang, Min; Li, Dengke; Zhou, Wei; Wang, Lei; Tetrahedron; vol. 68; 7; (2012); p. 1926 – 1930;,
Thiazole | C3H3NS – PubChem
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

A solution of ethyl 5-amino-2-methylthiazole-4-carboxylate (1.7 g, 9.0 mmol), 1-bromo-2- methoxyethane (1.2 g, 9.0 mmol) and C52CO3 (4.4 g, 13.5 mmol) in DMF (10 mL) was heatedto 50 C for 7 hours and then cooled to r.t. The crude product was purified by reverse phaseC18 column chromatography (MeCN/H20) to give ethyl 5-((2-methoxyethyl)amino)-2-methylthiazole-4-carboxylate as an orange oil (850 mg, 3.48 mmol, 39%). ESI-MS m/z: 245.2[M+Hj ., 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; ENANTA PHARMACEUTICALS, INC.; SHOOK, Brian, C.; KIM, In, Jong; BLAISDELL, Thomas, P.; YU, Jianming; PANARESE, Joseph; OR, Yat, Sun; (434 pag.)WO2017/15449; (2017); 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.64987-16-2,Methyl 2-(2-aminothiazol-4-yl)acetate,as a common compound, the synthetic route is as follows.

64987-16-2, To a mixture of tert-butyl nitrite (10 mL, 80 mmol) and CuCN (7.28 g, 80 mmol) in anhydrous acetonitrile (30 mL) was added a solution of ethyl 2-(2-aminothiazol-4-yl)acetate (7.5 g, 40 mmol) in anhydrous acetonitrile (20 mL) dropwise over a period of 1 hour at 50 C., then the mixture was stirred at the temperature for 2.5 hours. The mixture was concentrated in vacuo and the residue was purified by a silica gel column chromatography (PETROLEUM ETHER/EtOAc (V/V)=25/1) to give the title compound as yellowish liquid (2 g, 25%). The compound was characterized by the following spectroscopic data: 1H NMR (400 MHz, DMSO-d6): delta 4.01 (q, 2H), 3.72 (s, 2H), 1.16 (t, 3H).

64987-16-2 Methyl 2-(2-aminothiazol-4-yl)acetate 738059, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; SUNSHINE LAKE PHARMA CO., LTD.; ZHANG, Yingjun; REN, Qingyun; LIU, Xinchang; GOLDMANN, Siegfried; US2015/152096; (2015); 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.31785-05-4,Ethyl 5-amino-2-methylthiazole-4-carboxylate,as a common compound, the synthetic route is as follows.

31785-05-4, To a solution of 5-amino-2-methyl-thiazole-4-carboxylic acid ethyl ester (15.0 g, 0.081 mol) in DCM (550 mL) was added chlorosulfonyl isocyanate (8.92 mL, 0.102 mol) dropwise at -78 0C. The thick suspension was allowed to warm to RT and stirred for 45 minutes. The resulting precipitate was collected by filtration and dried in vacuo. The resultant white solid was suspended in an aqueous solution of HCl (6 M, 400 mL) and heated at 90 C for 1 h. The resulting solution was cooled to 0 C and pH adjusted to 5 with an aqueous solution of NaOH (6 M). The resultant precipitate was collected by filtration and dried in vacuo at 60 C for 36 h to give the title compound (16.4 g, 89 %). [M + H]+ 230.0

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

Reference：
Patent; F.HOFFMANN-LA ROCHE AG; WO2008/152390; (2008); 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.943-03-3,6-Methoxybenzo[d]thiazole-2-carbonitrile,as a common compound, the synthetic route is as follows.

943-03-3, STR24 2-Cyano-6-hydroxybenzothiazole. Dry pyridinium hydrochloride (34.0 g, 0.294 mol) and 2-cyano-6-methoxy-benzothiazole (Aldrich Chemical Co., 3.0 g, 0.016 mol) were added into a 500 mL round bottom flask which was preheated in an oil bath at 100° C. The bath temperature was increased to 190° C. and the reaction mixture was refluxed at this temperature for 2 h. After the completion of reaction, it was cooled to room temperature to obtain a yellow solid which was dissolved in methanol. Silica was added to this solution and evaporated to dryness. This material was then chromatographed using 30percent ethyl acetate/hexane to obtain 2.7 g of the product as a white solid (95percent): mp 120° C.; 1 H NMR (CD3 OD) delta 5.68 (bs, 1H), 8.02-8.82 (m, 3H); — C NMR (CD3 OD) delta 106.96, 114.26, 119.59, 126.53, 133.83, 138.93, 147.25, 160.23; MS m/e (rel intensity) 176 (100), 151 (3), 124 (5), 96 (15), 85 (4), 69 (7), 57 (5); Exact mass: calcd 176.0044, found 176.0047. STR25

943-03-3 6-Methoxybenzo[d]thiazole-2-carbonitrile 342109, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Board of Governors of Wayne State University; US5616729; (1997); 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.14190-59-1,Thiazole-2-carboxylic acid,as a common compound, the synthetic route is as follows.

Compound 1 (3mmol), compound 2 (3mmol), N-ethyl-N’-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) (3.3mmol) and N,N-dimethyl pyridine (DMAP) (0.3mmol) were mixed with a molecular sieve, and the resulted mixture was cooled in ice bath (0°C). Then DMF and pyridine (4.5mmol) were added in turn. The progress of reaction was tracked by TLC. After the reaction was completed, the reactant was diluted with water and extracted with EtOAc. The solvent was removed completely by concentration. Then compound 3 was obtained through column chromatograph (yield 60percent). Subsequently, compound 3 (0.3mmol) was mixed with ammonium acetate (NH4OAc) (15mmol) and sodium acetate (NaOAc) (30mmol) and heated to 130°C, and the progress of reaction was tracked by TLC. Then the reactant was cooled to room temperature, and diluted with water, extracted with ethyl acetate. The solvent was removed completely by concentration. Then compound 4i (Wang279-1) was obtained by separation through column chromatograph with petroleum ether/ ethyl acetate (volume ratio 1:1) (yield 31percent).

14190-59-1, 14190-59-1 Thiazole-2-carboxylic acid 2762733, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Shanghai Institute of Materia Medica, Chinese Academy of Sciences; EP1889843; (2008); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

118452-02-1, 2-Aminothiazole-4-carboxamide is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

4. g (28 mmol) 2-Aminothiazol-4-carboxamide was dissolved in 40 ml glacial acetic acid, to which added 2.8 ml (29.6 mmol) acetic anhydride, followed by reacting under reflux for 2 hr, and naturally cooling down to precipitate a large quantity of solids, which were filtered, washed and dried to obtain 4.7 g 2-acetylaminothiazol-4-carboxamide (yield 92%) with mp >250C., 118452-02-1

The synthetic route of 118452-02-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Beijing Molecule Science and Technology Co., Ltd.; EP2039686; (2009); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

3034-53-5, 2-Bromothiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

a. 2-Formylthiazole To a cooled solution (-95° C.) of t-butyllithium (1.7M in pentane, 17.9 mL, 30.5 mmol, 2.0 eq) in tetrahydrofuran (150 mL) under nitrogen was added 2-bromothiazole (2.50 g, 15.3 mmol). The resulting suspension was stirred below -80° C. for 45 min The lithiated thiazole solution was transferred via cannula to a solution of dimethylformamide (1.42 mL) in tetrahydrofuran (100 mL) at -90° C. The reaction was allowed to warm to room temperature over 2 h and quenched by the addition of water (100 mL). The aqueous phase was extracted with ethyl acetate (3*75 mL). Combined organic extracts were dried over anhydrous magnesium sulfate, filtered and reduced to a crude oil in 87percent yield. TLC analysis (Rf 0.50, 40percent ethyl acetate in hexane). No further characterization was undertaken; the crude title compound was taken on to the sodium borohydride reduction.

3034-53-5, As the paragraph descriping shows that 3034-53-5 is playing an increasingly important role.

Reference：
Patent; Zeneca Limited; US5512575; (1996); A;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica