Heterocyclic Building Blocks-Thiazole

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

3622-35-3, Benzo[d]thiazole-6-carboxylic acid is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 50D benzothiazole-6-carboxylic acid methyl ester To a 250 mL round bottom flask was added benzothiazole-6-carboxylic acid (5.0 g, 27.9 mmol), 100 mL methanol, and 10 mL thionyl chloride. The solution was refluxed 2 hours, cooled to ambient temperature, and concentrated under reduced pressure to provide the title compound. 1H-NMR (300 MHz, DMSO-d6) delta ppm 3.91 (s, 3H), 8.10 (dd, 1H), 8.19 (d, 1H), 8.86 (d, 1H), 9.60 (s, 1H); MS (ESI) m/z 194 [M+H]+.

3622-35-3, 3622-35-3 Benzo[d]thiazole-6-carboxylic acid 601670, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Lynch, John K.; Collins, Christine A.; Freeman, Jennifer C.; Gao, Ju; Iyengar, Rajesh R.; Judd, Andrew S.; Kym, Philip R.; Mulhern, Mathew M.; Sham, Hing L.; Souers, Andrew J.; Zhao, Gang; Wodka, Dariusz; US2005/209274; (2005); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

939-69-5, 6-Hydroxybenzo[d]thiazole-2-carbonitrile is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

939-69-5, The mixture of 6-hydroxy-2-cyanobenzothiozole(0.311 g, 1.77 mmol), 3-chloropropyldimethylamine hydrochloride (0.36 g, 2.27 mmol), potassium carbonate (0.63g, 4.57 mmol) and sodium iodide (0.034 g) in acetone (30 ml) was heated to reflux overnight. Upon cooling to roomtemperature, the insoluble solid was removed by filtration. The compound was purified by flash chromatography usingmethylene chloride/methanol (96:4) as eluent in a yield of 86percent (0.387 g).1H NMR (CD2Cl2): 7.98 (d, J= 9.3 Hz, 1H), 7.32 (d, J= 2.4 Hz, 1H), 7.16 (dd, J = 9.0 Hz, J= 2.1 Hz, 1H), 4.04 (t, J = 6.4Hz, 2H, OCH2), 2.36 (t, J = 7.2 Hz, 2H, NCH2), 2.13 (s, 6H, CH3), 1.90 (m, 2H, CH2).

As the paragraph descriping shows that 939-69-5 is playing an increasingly important role.

Reference：
Patent; Promega Corporation; Cali, James J.; Daily, William; Hawkins, Erika; Klaubert, Dieter; Liu, Jianquan; Meisenheimer, Poncho; Scurria, Michael; Shultz, John W.; Unch, James; Wood, Keith V.; Zhou, Wenhui; Valley, Michael P.; (202 pag.)EP2277872; (2016); B1;,
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.3581-89-3,5-Methylthiazole,as a common compound, the synthetic route is as follows.

(a) To a solution of n-butyllithium (24 ml, 0.06 mol, 2.5M in hexane) in 50 ml of ether under argon at -78 C. was added dropwise a solution of 5-methylthiazole (5 g, 0.05 mol) in 25 ml of ether. The mixture was stirred at -78 C. for 1 h, and then a solution of N-formyl-morpholine (5.5 ml 0.055 mol) in 30 ml of ether was added within 15 min. The mixture was stirred for 1 h at -78 C., then at 0–5 C. overnight. The reaction mixture was then extracted with 4N HCl (4*10 ml), the aqueous layers were combined, cooled in an ice-bath, and neutralized with sodium bicarbonate solution (pH 9). The aqueous layer was extracted with ether (4*20 ml), the organic layer was dried over magnesium sulfate and concentrated in vacuo. The residue was dried in vacuo to afford 4.5 g (70.8%%) of 5-methyl-2-thiazolylcarboxaldehyde.

3581-89-3, As the paragraph descriping shows that 3581-89-3 is playing an increasingly important role.

Reference：
Patent; Sterling Winthrop Inc.; US5569655; (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.3622-35-3,Benzo[d]thiazole-6-carboxylic acid,as a common compound, the synthetic route is as follows.

Benzothiazole-6-carboxylic acid (6.00 g, 33.5 mmol) and 1-hydroxybenzotriazole (6.79 g, 50.2 mmol) were dissolved in N,N-dimethylformamide (500 mL, 6000 mmol). Then N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide hydrochloride (9.63 g, 50.2 mmol) was added and the reaction was stirred at room temperature for 20 min. 4-(Methylamino)phenol sulphate (5.76 g, 16.7 mmol) was added followed by triethylamine (14.0 mL, 1.00E2 mmol). The reaction was stirred at room temperature for 5 days. The reaction mixture was evaporated and the residue was suspended in H2O (300 mL) and extracted with ethyl acetate (400 mL * 3). The combined organic phases were washed with sat. aq. NaHCO3 (300 mL), dried with magnesium sulfate, filtered and evaporated. The crude product was purified using Combiflash (Silica, Column Size 220 g, Eluent: heptane:ethyl acetate). Fractions containing the product were combined and evaporated to yield the intermediate N-(4-hydroxyphenyl)-N-methylbenzo[d]thiazole-6-carboxamide (26%) as light brown crystals. 1H NMR: (600 MHz, DMSO) delta 9.50 (s, 1H), 9.42 (s, 1H), 8.13 (br s, 1H), 7.89 (d, J = 8.2 Hz, 1H), 7.35 (br s, 1H), 7.00 (d, J = 8.2 Hz, 2H), 6.60 (d, J = 8.6 Hz, 2H), 3.34 (s, 3H). [M+H+]: 284.9.

3622-35-3, As the paragraph descriping shows that 3622-35-3 is playing an increasingly important role.

Reference：
Article; Kilburn, John Paul; Kehler, Jan; Langgard, Morten; Erichsen, Mette N.; Leth-Petersen, Sebastian; Larsen, Mogens; Christoffersen, Claus Tornby; Nielsen, Jacob; Bioorganic and Medicinal Chemistry; vol. 21; 19; (2013); p. 6053 – 6062;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

3622-35-3, Benzo[d]thiazole-6-carboxylic acid is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

STEP A: Preparation of benzothiazole-6-carboxylic acid (4-hydroxy-butyl)-amide (14A). 2.69 g (15 mmol) of benzothiazole-6-carboxylic acid is dissolved in a mixture of l.34 g (15 mmol) 4-amino-butan-l-ol and 70 mL dry tetrahydrofuran. 2.43 g (15 mmol) of CDI is added after stirring for 30 minutes and then stirred for another hour. The mixture is concentrated in vacuum. The resulting residue is suspended in dichloromethane, water is added, and the organic phase is separated. The aqueous phase is extracted with dichloromethane twice. The combined organic phases are dried over sodium sulfate and concentrated in vacuum. Yield: 55%; ESI-MS: 251 (M+H+)., 3622-35-3

3622-35-3 Benzo[d]thiazole-6-carboxylic acid 601670, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; MOTAC NEUROSCIENCE LIMITED; WO2009/56805; (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

The (4-formylphenyl)boronic acid 118 (0.30 g, 2.0 mmol), 2-bromo-1,3-thiazole 119a (0.33 g, 2.0 mmol), Pd(PPh3)4(0.12 g, 0.1 mmol), aqueous solution of potassium carbonate (0.4 M, 5 mL), ethanol (5 mL) and toluene (2 mL) were added to a 50 mL flask under nitrogen. The reaction mixture was stirred at 115 C. for 24 hours and then cooled to room temperature. After removing the solvent, the crude residue was purified by column chromatography on silica gel using EA/ hexane (1/5) as eluent. The product 120a was obtained as a white solid at a yield of 95%

3034-53-5, The synthetic route of 3034-53-5 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; National Health Research Institutes; Academia Sinica; Chen, Chih-Hao; Shih, Chuan; Chen, Chiung-Tong; Wang, Hwei-Jiung; Huang, Kai-Fa; US2020/71312; (2020); 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.3622-35-3,Benzo[d]thiazole-6-carboxylic acid,as a common compound, the synthetic route is as follows.

Example 36:; EPO To a reaction mixture of amino ethyl ester 31a (0.31 g, 1.24 mmol) and aryl carboxylic acid (0.22 g, 1.24 mmol) in DMF (4 mL), EDC (0.36 g, 1.9 mmol), DMAP (25.0 mg, 0.28 mmol) and triethyl amine (345 mul_, 3.72 mmol) were added. The reaction mixture was stirred for 16 hours at room temperature. Crude product was purified by prep-HPLC without work up (10_50_60min, 0.1% TFA in water and acetonitrile) giving 0.30 g (59%) of oil 36. 1H NMR (DMSOd6): delta 1.06 (t, 3H, J=7.06 Hz), 3.54 (s, 2H), 4.08 (dd, 3H, J=6.97, 1.13 Hz), 7.32 (dd, 1 H, J=9.04, 6.78 Hz), 7.65 (dd, 1 H, J=4.14, 0.94 Hz), 7.77 (m, 1 H, J=8.48, 7.16, 4.90, 4.90, 4.90 Hz), 7.94 (d, 1 H, J=8.48 Hz), 8.17 (d, 1 H, J=8.48 Hz), 8.63 (d, 1 H, J=1.70 Hz), 9.30 (d, 1 H, J=8.29 Hz), 9.55 (s, 1 H). LCMS 413 (M+H).

3622-35-3, As the paragraph descriping shows that 3622-35-3 is playing an increasingly important role.

Reference：
Patent; PFIZER, INC.; WO2006/40646; (2006); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

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

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 by10percent 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 10percent 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., 3622-38-6

As the paragraph descriping shows that 3622-38-6 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;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

96929-05-4, Ethyl 2-(((tert-butoxycarbonyl)amino)methyl)thiazole-4-carboxylate is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

96929-05-4, a 2-(N-t-butoxycarbonylamino)methylthiazol-4-carboxylic acid A 20 ml portion of a 2N aqueous sodium hydroxide solution was added to 100 ml of an ethanol solution containing 5.727 g of ethyl 2-(N-t-butoxycarbonylamino)methylthiazol-4-carboxylate, and the mixture was then stirred at room temperature for 45 minutes. After adjustment to pH 5 with 2N hydrochloric acid, the solvent was evaporated under reduced pressure. Further, the solution was dissolved in 300 ml of ethanol under heating, and after the removal of a salt by filtration, the solvent was evaporated under reduced pressure to obtain 4.228 g of 2-(N-t-butoxycarbonylamino)methylthiazol-4-carboxylic acid as a milky white solid. NMR (DMSO-d6) delta: 1.41 (9H, s), 4.39 (2H, d, J=6.0 Hz), 7.86 (1H, br.t, J=6.0 Hz), 8.34 (1H, s), 13.0 (1H, br.s) MS (EI): 258 (M+)

96929-05-4 Ethyl 2-(((tert-butoxycarbonyl)amino)methyl)thiazole-4-carboxylate 9925901, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Meiji Seika Kabushiki Kaisha; US5990101; (1999); A;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica