Heterocyclic Building Blocks-Thiazole

119778-44-8, 4-Ethyl-2-methylthiazole-5-carboxylic acid is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

EXAMPLE 7 In a similar apparatus to Example 1, 8.6 g (0.05 mole) of 2-methyl-4-ethylthiazole-5carboxylic acid were suspended in 200 ml of toluene. Under heating and reflux, phosgene was blown at a rate of 340 ml/hr for 12 hours (0.18 mole). After completion of the reaction, the reaction mixture was filtered and the filtrate was concentrated to obtain 9.2 g of 2-methyl-4-ethylthiazole-5-carboxylic acid chloride. Its purity and yield were 96.0% and 96.6%, respectively. NMR (deltaCDCl 3/TMS, ppm): 1.25(3H,t,J=8Hz), 2.46(3H,s), 3.06(2H,q,J=8Hz)., 119778-44-8

As the paragraph descriping shows that 119778-44-8 is playing an increasingly important role.

Reference：
Patent; Mitsui Toatsu Chemicals, Inc.; US5136042; (1992); 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.40283-41-8,2-Aminothiazole-4-carboxylic acid,as a common compound, the synthetic route is as follows.

A solution of 2-amino-1,3-thiazole-4-carboxylic acid (85 mg, 0.59 mmol), TBTU (227 mg, 0.708 mmol), tert-butylpiperidin-4-ylcarbamate (236 mg, 1.18 mmol) and DIPEA (0.403 mL, 2.36 mmol) in dry DME (5 mL) was let understirring at rt overnight. The mixture was then diluted with EtOAc, washed with a saturated solution of NaHCO3, water and brine, dried over Na2SO4 and filtered. The title compound was purified by column chromatography (eluant DCM:MeOH = 98:2) and isolated as light yellow solid (147 mg, 77%).1H NMR (500 MHz, DMSO-d6) ppm 1.21 – 1.32 (m, 2 H) 1.38 (s, 9 H) 1.65- 1.81 (m, 2 H) 2.71 -2.90 (m, 1 H) 2.96- 3.15 (m, 1 H) 3.44 -3.57 (m, 1 H) 4.21 -4.32 (m, 2 H) 6.88 (d, J=7.93 Hz, 1 H) 6.92 (s, 1 H) 7.10 (s, 2 H).HRMS (ESI+): calcd. for C14H23N403S [M + H] 327.1486; found 327.1473., 40283-41-8

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

Reference：
Patent; NERVIANO MEDICAL SCIENCES S.R.L.; CASALE, Elena; CORTI, Emliana; GNOCCHI, Paola; NESI, Marcella; ORRENIUS, Sten, Christian; QUARTIERI, Francesca; RICCARDI SIRTORI, Federico; (138 pag.)WO2018/19681; (2018); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

824403-26-1,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.824403-26-1,5-Bromo-2-chlorobenzo[d]thiazole,as a common compound, the synthetic route is as follows.

To a solution of 5-bromo-2-chlorobenzo[cf]thiazole (0.9 g, 3.62 mmol) in ethanol (12 ml), was added 4 M methyl amine solution (1 ml_) and the reaction mixture was heated at 150 C for 45 min using a Biotage microwave. The reaction mixture was cooled to room temperature. The solvent was removed under reduced pressure, and the crude reaction mixture was purified by flash column chromatography using hexane: ethyl acetate (50:50) to afford the title compound as a solid (0.57 g, 65%).1H-NMR (400 MHz, CDCI3) d = 7.68 (t, J = 2.0 Hz, 1 H), 7.46 (d, J = 8.3 Hz, 1 H), 7.29 (d, J = 0.7 Hz, 1 H), 7.22 (dd, J = 8.4, 1.9 Hz, 1 H), 5.90 (s, 1 H), 3.13 (s, 3H).

824403-26-1 5-Bromo-2-chlorobenzo[d]thiazole 20251269, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; AC IMMUNE SA; NAMPALLY, Sreenivasachary; GABELLIERI, Emanuele; MOLETTE, Jerome; (0 pag.)WO2019/233883; (2019); 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.

In a 3-necked round bottomed flask, containing a magnetic stirrer, 80 mg (0.36mmol) of delta-amino^-bromo-i -methyl-I H-imidazole^- carboxamide, 0.16 g (1.83 mmol) of LiBr, 98 mg (0.80 mmol) of potassium te/t-butoxide and 8.85g (64mmol) of 7-chloro-benzothiazole-2-thiol were weighted. The flask was purged with argon and 6ml of distilled DMF were added by syringe. The resulting suspension was stirred overnight at 13O0C. After this, the solvent was removed under high vacuum and the crude was purified through flash chromatography (SiO2, CH2CI2/MeOH : 96/4 affording the 5-amino-2-(7- chloro-benzothiazol-2-ylsulfanyl)-1 -methyl-1 H-imidazole-4-carboxamide compound (38 mg, 31 percent) as a foam. 1H-NMR [CD3OD, delta, ppm]: 7.81 (m, 1 H), 7.48 (m, 1 H), 7.42 (m, 1 H), 3.56 (s, 3H, CH3). MS (El, m/z) 340 (M++1 )., 1849-73-6

As the paragraph descriping shows that 1849-73-6 is playing an increasingly important role.

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

64987-16-2, Methyl 2-(2-aminothiazol-4-yl)acetate is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,64987-16-2

Obtained in 96% yield as a white crystalline solid by treatment of methyl 2-amino-4-thiazolylacetate with trityl chloride and TEA in DCM for 15 h and successive crystallization of the crude product from diisopropyl ether; mp 177 C; 1H NMR (CDCl3) delta 7.25-7.34 (m, 15H), 6.22 (s, 1H), 3.76 (s, 3H), 3.66 (s, 2H).

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

Reference：
Article; Bolchi, Cristiano; Pallavicini, Marco; Bernini, Sergio K.; Chiodini, Giuseppe; Corsini, Alberto; Ferri, Nicola; Fumagalli, Laura; Straniero, Valentina; Valoti, Ermanno; Bioorganic and Medicinal Chemistry Letters; vol. 21; 18; (2011); p. 5408 – 5412;,
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.6294-52-6,5,6-Dimethoxybenzo[d]thiazol-2-amine,as a common compound, the synthetic route is as follows.

General procedure: Corresponding benzo[d]thiazol-2-amine (3 and 4) (0.025 mol) and triethylamine (0.030 mol,4.24 mL) were dissolved in THF (50 mL). This mixture was kept on an ice bath andchloroacetyl chloride (0.030 mol, 2.37 mL) in THF (10 ml) was added dropwise with constantstirring. After this stage, the content was allowed to stir for an additional 1 h at roomtemperature. THF was evaporated, the raw product was washed with water, dried andrecrystallized from ethanol.2,3, 6294-52-6

6294-52-6 5,6-Dimethoxybenzo[d]thiazol-2-amine 94938, athiazole compound, is more and more widely used in various fields.

Reference：
Article; Demir Oezkay, Uemide; Can, Oezguer Devrim; Sa?l?k, Beguem Nurpelin; Acar Cevik, Ulviye; Levent, Serkan; Oezkay, Yusuf; Ilg?n, Sinem; Atl?, Oezlem; Bioorganic and Medicinal Chemistry Letters; vol. 26; 22; (2016); p. 5387 – 5394;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

908591-25-3, 1-(2-Isopropylthiazol-4-yl)-N-methylmethanamine hydrochloride is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,908591-25-3

2-Isopropyl-4-(((N-methyl)amino)methyl)thiazole hydrochloride prepared from Example 4 (6.0 g) was suspended in THF (100 ml). N-(((4-nitrophenyl)oxy)carbonyl)-L- valine methyl ester from Example 5 (12.4 g), dimethylaminopyridine (0.6 g), and triethylamine (5.85 g) were mixed with the suspension and the mixture heated to about 70C for 8 hours. The solid impurities were filtered and the filtrate concentrated under reduced pressure. The oil obtained was dissolved in dichloromethane (50 ml) and washed thrice with 10% potassium carbonate solution (30 ml) and thrice with water (30 ml). The organic layer was concentrated completely under reduced pressure to provide the title compound as a light brown color oil.Yield: 12 g

908591-25-3 1-(2-Isopropylthiazol-4-yl)-N-methylmethanamine hydrochloride 11622565, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; RANBAXY LABORATORIES LIMITED; WO2006/90270; (2006); A1;,
Thiazole | C3H3NS – PubChem
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;,
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

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;,
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.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;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica