Tag: M.W:200-300

494769-34-5,494769-34-5, N-Boc-2-Amino-4-formylthiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

nBuLi (575 muL of a 1.6 M solution in hexanes; 0.920 mmol) was added dropwise to a cold (-78 C.) solution of Me(O)P(OEt)2 (134 muL; 0.920 mmol) in THF (0.30 mL). After 20 min a solution of Example 39 Part A compound (100 mg; 0.438 mmol) in THF (0.70 mL) was added dropwise. After 1 h at -78 C, the reaction was quenched by addition of AcOH (63 muL; 1.10 mmol). The reaction was warmed to RT and concentrated using a stream of Ar. The residue was partitioned between EtOAc (5 mL) and brine (4 mL). The organic phase was dried (MgSO4) and concentrated in vacuo. The crude product was chromatographed (SiO2; continuous gradient from 0 to 100% EtOAc in hexanes over 8 min, switch to 4% MeOH in EtOAc and hold for 6 min) to give Part A compound (104 mg; 62%) as a syrup.

The synthetic route of 494769-34-5 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Bristol-Myers Squibb Company; US2008/9465; (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.99073-88-8,Ethyl 2-bromo-6-benzothiazolecarboxylate,as a common compound, the synthetic route is as follows.

99073-88-8, Under nitrogen atmosphere, to a solution of this compound (4.00 g) in DMSO (100 mL)-CH3CN (100 mL) were added successively Pd(PPh3)4 (485 mg) and sodium formate (4.76 g), and the mixture was stirred at 100C for 75 minutes. The solvent was evaporated under reduced pressure, and thereto was added water, and the mixture was extracted four times with Et2O, and dried over MgSO4. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column (hexane/ethyl acetate = 10/1) to give ethyl 1,3-benzothiazole-6-carboxylate (1.21 g, 42 %). 1H NMR (CDCl3, 400MHz) delta 9.15 (s, 1H), 8.71 (dd, 1H, J=1.6, 0.5Hz), 8.21 (dd, 1H, J=8.6, 1.6Hz), 8.17 (dd, 1H, J=8.6, 0.5Hz), 4.44 (q, 2H, J=7.1Hz), 1.44 (t, 3H, J=7.1Hz).

The synthetic route of 99073-88-8 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Sumitomo Pharmaceuticals Company, Limited; EP1479384; (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.1849-73-6,7-Chlorobenzo[d]thiazole-2(3H)-thione,as a common compound, the synthetic route is as follows.

A solution of 5-amino-2-bromo-1 -butyl-1 H-imidazole-4- carboxamide (46 mg, 0.17 mmol), potassium te/t-butoxide (64 mg, 0.52 mmol), lithium bromide (76 mg, 0.8 mmol) and 7-chloro-benzothiazole-2-thiol (86 mg, 0.4 mmol) in 7 ml_ of DMF was stirred at 12O0C for 16 h. Removal of the solvent and purification by chromatography on silica (CHCI3/MeOH, 10percent) yielded 5-amino-1 -butyl-2- (7-chloro-benzothiazol-2-ylsulfanyl)-1 H-imidazole-4-carboxamide (33 mg, 49percent) as a foam. 1H-NMR [CDCI3, delta, ppm]: 7.73 (m, 1 H), 7.33 (m, 1 H), 7.26 (m, 1 H), 3.89 (m, 2H, CH2N), 1.54 (m, 2H, CH2), 1.37 (m, 2H, CH2), .0.92 (m, 3H, CH3). MS (El, m/z) 382 (M++1 ).

1849-73-6, 1849-73-6 7-Chlorobenzo[d]thiazole-2(3H)-thione 11171663, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; CRYSTAX PHARMACEUTICALS, S.L.; WO2009/7399; (2009); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

14769-73-4, (S)-6-Phenyl-2,3,5,6-tetrahydroimidazo[2,1-b]thiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

In 1000 ml four-mouth bottle into L-tetramisole 50g, inputs isopropanol 500g, heating is dissolved, add activated carbon 0.5g, sodium metabisulfite 0.75g stirring decolourizations 30 minutes, filtration, filtrate hydrogen chloride gas under stirring 9g, to pH4-5, filtering, levamisole hydrochloride dried to get 54.3g,yield 92.1percent, the target product without yellow block, long-term storage quality and stability., 14769-73-4

The synthetic route of 14769-73-4 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; lianyungangCity Yahui Pharmachem Co.,Ltd; Changzhou Yabang-QH Pharmachem Co., Ltd.; ZHU, JIANMIN; ZHANG, PINGHU; ZHANG, JIANFENG; LI, ZHILING; LIU, YONGLIN; (4 pag.)CN104230959; (2016); B;,
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.3622-30-8,2,4-Dichlorobenzothiazole,as a common compound, the synthetic route is as follows.

EXAMPLE 164 (+)-(4aR)-(10bR)-4-methyl-8-(4-chloro-2-benzothiazolylthio)-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one STR181 A 15 mL round bottom flask was charged with (+)-(4aR)-(10bR)-4-methyl-8-mercapto-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one (100 mg, 0.38 mmol), potassium carbonate (158 mg, 1.14 mmol), 2,4-dichlorobenzothiazole (94 mg, 0.46 mmol) and 1 mL of anhydrous dimethyl formamide, fitted with a reflux condenser, and the stirred mixture was heated at 60°, under nitrogen, for 48 h. The mixture was cooled, diluted with ethyl acetate (75 mL) and washed with brine (2*25 mL). The combined organic extracts were dried over sodium sulfate, concentrated, and purified by silica gel chromatography (80percent ethyl acetate/hexanes eluent) to give 80 mg (49percent) of the title compound as an amorphous solid. mp 207°-209°. FDMS: m/e=429 alpha[D]589 =+63.86 (c=0.57, chloroform).

3622-30-8, As the paragraph descriping shows that 3622-30-8 is playing an increasingly important role.

Reference：
Patent; Eli Lilly and Company; US5578724; (1996); 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.15864-32-1,2-Amino-6-bromobenzothiazole,as a common compound, the synthetic route is as follows.

To a stirred solution of 6-bromobenzo[d]thiazol-2-amine (2.50 g, 10.7 mmol) and DMAP (1.33 g, 12.8 mmol) in 20 mL CH2Cl2 at 0 C, was added acetic anhydride (1.23 mL, 13.0 mmol) in 5 mL CH2Cl2 dropwise. The reaction mixture was stirred at room temperature for 12 h before 1 N HCl (20 mL) was added. After filtrated, the precipitate was washed with H2O and dried in vacuum to give the title compound (2.30 g, 79%) as a white solid., 15864-32-1

15864-32-1 2-Amino-6-bromobenzothiazole 85149, athiazole compound, is more and more widely used in various fields.

Reference：
Article; Yang, Zhaohui; Ma, Haikuo; Sun, Zhijian; Luo, Lusong; Tian, Sheng; Zheng, Jiyue; Zhang, Xiaohu; Bioorganic and Medicinal Chemistry Letters; vol. 25; 17; (2015); p. 3665 – 3670;,
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.15864-32-1,2-Amino-6-bromobenzothiazole,as a common compound, the synthetic route is as follows.

Example 1 (Method A); N-(6-(2-(3-(pyridin-3-yl)propoxy)pyrimidin-4-yl)benzo[d]thiazol-2-yl)acetamide; Step 1. N-(6-bromobenzopd’|thiazol-2-yl)acetamide; 6-Bromobenzo[d]thiazol-2-amine (Aldrich, St. Louis, MO; 10.02 g, 43.7 mmol) was suspended in DCM (175 mL) to which DMAP (6.107 g, 50.0 mmol) was added. The flask was cooled in an ice water bath under argon, and acetic anhydride (4.60 mL, 48.8 mmol) was added, and the reaction was warmed to RT and stirred overnight. The reaction was washed with 10% HCl and water. The precipitate in the organic phase was filtered. The aqueous washings were extracted with DCM and 10: 1 DCM / MeOH. These extracts were concentrated, combined with the filtrate from the above filtration, and concentrated again. The solid was collected (from the filtration as well as the aqueous workup), concentrated, and dried under vacuum to afford the desired N-(6-bromobenzo[d]thiazol-2-yl) acetamide (12.30 g, 45.39 mmol, 88% purity, 91% yield). MS (ESI pos. ion) m/z: 271 (MH+, 79Br), 273 (MH+, 81Br). Calculated exact mass for C9H7BrN2OS: 270 (79Br), 272 (81Br)., 15864-32-1

The synthetic route of 15864-32-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; AMGEN INC.; WO2009/17822; (2009); A2;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

133692-16-7, 2-Amino-5-bromo-4-methylthiazole hydrochloride is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 64 A mixture of 2-amino-5-bromo-4-methylthiazole hydrochloride (1.15 g), 2-mercaptopyrimidine (0.6 g) and potassium carbonate (1.7 g) in N,N-dimethylformamide (20 ml) was heated at 90 C. for 3.5 hours with stirring. The reaction mixture was poured into ice water. The mixture was extracted with a mixture of tetrahydrofuran and ethyl acetate (1:1), washed with aqueous saturated sodium chloride and dried over magnesium sulfate. The solvent was concentrated under reduced pressure to give solid. The solid was subjected to column chromatography on silica gel (silica gel 60, 70-230 mesh,; Merck: 100 g) and eluted with a mixture of chloroform and methanol (10:1). The fractions containing the objective compound were combined and concentrated under reduced pressure to give 2-amino-4-methyl-5-(2-pyrimidinylthio)thiazole (0.65 g, yield: 58.0%). mp: 165-170 C. (dec.) IR (Nujol): 3300, 3175, 1630, 1555, 1490, 1320 cm-1 NMR (DMSO-d6, 200 MHZ, ppm): 2.10 (3H, s), 7.24-7.33 (1H, m), 7.33 (2H, s), 8.64 (2H, d, J=5Hz) Mass: M+1 225, M 224, m/e 209, 191, 182, 166, 145, 133692-16-7

As the paragraph descriping shows that 133692-16-7 is playing an increasingly important role.

Reference：
Patent; Fujisawa Pharmaceutical Co., Ltd.; US5256675; (1993); A;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

209459-11-0, Methyl 2-aminobenzo[d]thiazole-7-carboxylate is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

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 FC (gradient: heptane to EtO Ac/heptane 4/6) to give the desired product. LC-MS: tR = 0.85 min; [M+H]+ = 194.0., 209459-11-0

The synthetic route of 209459-11-0 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; ACTELION PHARMACEUTICALS LTD; WO2009/16560; (2009); A2;,
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.3622-38-6,2-Chloro-5-nitrobenzo[d]thiazole,as a common compound, the synthetic route is as follows.

To a solution of 2-chloro-5-nitrobenzo[d]thiazole (200 mg, 931 muetaiotaomicronIota) in THF (1 .5 mL) Et3N (0.195 mL, 1 .4 mmol) followed by piperidine (0.138 mL, 1 .4 mmol) was added. The mixture was stirred at 65°C for 1 h before it was diluted with EA (50 mL) and washed with water (50 mL). The organic extract was dried over MgS04, filtered and concentrated to give 5-nitro-2- (piperidin-1 -yl)benzo[d]thiazole (250 mg) as a solid; LC-MS: tR= 0.92 min; [M+H]+= 264.18., 3622-38-6

3622-38-6 2-Chloro-5-nitrobenzo[d]thiazole 11413249, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; ACTELION PHARMACEUTICALS LTD; AISSAOUI, Hamed; BOLLI, Martin; BOSS, Christoph; RICHARD-BILDSTEIN, Sylvia; SIEBER, Patrick; (95 pag.)WO2016/207785; (2016); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica