Heterocyclic Building Blocks-Thiazole

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.42270-37-1,2-(Piperazin-1-yl)thiazole,as a common compound, the synthetic route is as follows.

The product from Example 33A (0.2 g, 1.18 mmol), the product from Example 33B (0.25 g, 1.48 mmol) and N,N-diisopropylethylamine (0.41 mL, 2.3 mmol) were combined in toluene (25 mL) and heated at reflux overnight. The reaction was allowed to cool to room temperature, filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (elution with 50% ethyl acetate:hexanes) to provide 0.08 g (22%) of the desired material as a white solid. mp 151-153 C.; 1H NMR (300 MHz, DMSO-d6) ? 2.28 (s, 3H), 2.65 (m, 4H), 3.20 (s, 2H), 3.48 (m, 4H), 6.85 (m, 2H), 7.18 (m, 2H), 7.48 (m, 2H), 9.65 (s, 1H); MS (DCI/NH3) m/e 317 (M+H)+; Anal calcd for C16H20N4OS: C, 60.73; H, 6.37; N, 17.71. Found: C, 60.66; H, 6.24; N, 17.35.

42270-37-1, The synthetic route of 42270-37-1 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Stewart, Andrew O.; Kolasa, Teodozyj; US2003/232836; (2003); 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.1123-55-3,Benzo[d]thiazol-7-amine,as a common compound, the synthetic route is as follows.

General procedure: A mixture of aniline 1a (0.45 g, 0.005 mol), triethyl orthoformate (30 mL) and 2 mol of diphenyl phosphite (1.91 g, 0.01 mol) was stirred at 130 C for 2.5 h with continuous removal of ethanol formed. The reaction was monitored by TLC on silica gel using petroleum ether and ethyl acetate (1:2 v/v). After cooling, the volatiles were removed in vacuo. The residue was chromatographed on silica gel using CHCl3-MeOH (9:1).

1123-55-3, The synthetic route of 1123-55-3 has been constantly updated, and we look forward to future research findings.

Reference：
Article; Balakrishna; Narayana Reddy, M. Veera; Rao, P. Visweswara; Kumar, M. Anil; Kumar, B. Siva; Nayak; Reddy, C. Suresh; European Journal of Medicinal Chemistry; vol. 46; 5; (2011); p. 1798 – 1802;,
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.2941-58-4,2-Bromo-6-methoxybenzothiazole,as a common compound, the synthetic route is as follows.

2-Bromo-6-methoxybenzo [d] thiazole (555 mg, 2.28 mmol) was dissolved in methylene chloride (10 mL) at room temperature under an argon atmosphere. To the resulting solution, 1 M boron tribromide methylene chloride solution (4 mL) was added at room temperature. The resulting mixture was stirred under an argon atmosphere at room temperature for 7 hours.The reaction mixture was added to ice water and then extracted with chloroform (3 × 30 mL). The combined organic layer was dried over anhydrous sodium sulfate, and then the solvent was distilled off under reduced pressure. The obtained residue was purified by silica gel column chromatography (silica gel 80 g; hexane: ethyl acetate (3: 1)) to give 2-bromobenzo [d] thiazol-6-ol (521 mg, yield 99 %) As a brown solid. The measured physical properties of the product are as follows., 2941-58-4

2941-58-4 2-Bromo-6-methoxybenzothiazole 11218765, athiazole compound, is more and more widely used in various fields.

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

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

Benzothiazole-6-carboxylic acid (0.0717 g, 0.582 mmol) and 1-hydroxybenzotriazole (118 mg, 0.874 mmol) were dissolved in N,N-dimethylformamide (8 mL, 100 mmol). N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide hydrochloride (0.168 g, 0.874 mmol) was added and the reaction was stirred at rt for 20 min. Methyl-[4-(quinolin-2-ylmethoxy)-phenyl]-amine (0.153 g, 0.582 mmol) was added followed by triethylamine (0.244 mL, 1.75 mmol). The reaction was stirred at room temperature for 20 h. H2O (20 mL) was added to the reaction and the mixture was extracted with ethyl acetate (40 mL * 3). The combined organic phases were washed with satd aq NaHCO3 (40 mL), dried with magnesium sulfate, filtered and evaporated. The crude product was purified using column chromatography. The product fractions were combined and evaporated and the residue crystallised from ethyl acetate/heptane to yield the title compound as an off white solid (20% yield). 1H NMR: (600 MHz, CDCl3) delta 9.00 (s, 1H), 8.17 (d, J = 8.7 Hz, 1H), 8.05 (d, J = 8.7 Hz, 1H), 8.01 (s, 1H), 7.87 (d, J = 8.7 Hz, 1H), 7.83 (d, J = 8.2 Hz, 1H), 7.73 (dt, J = 1.4 Hz, J = 7.4 Hz, 1H), 7.59-7.53 (m, 2H), 7.35 (d, J = 8.2 Hz, 1H), 6.98 (d, J = 8.4 Hz, 2H), 6.86 (d, J = 8.8 Hz, 2H), 5.29 (s, 2H), 3.49 (s, 3H). [M+H+]: 426.1., 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：
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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.921927-88-0,Methyl 2-formylthiazole-4-carboxylate,as a common compound, the synthetic route is as follows.

(0283) A solution of DIEA (15.8 mL, 110 mmol) in anhydrous ether (200 mL) was cooled to -78 C. n-BuLi (2M, 55 ml, 110 mmol) was added drop wise. The resulting mixture was warmed to 0 C. then continued to be stirred for 45 min at 0 C. The mixture was recooled to -78 C. and a solution of sulfinamide 51 (10 g, 52 mmol) in ether (100 mL) was added dropwise. The reaction mixture and stirred at -78 C. for 1 h. Chlorotitanium triisopropoxide (31.7 g, 121 mmol) was added and resulting reaction mixture was continue stirred at -78 C. for 1 h. Compound 48 (9 g, 52 mmol) was added in one portion and the resulting reaction mixture was continue stirred at -78 C. overnight. The reaction mixture was quenched with 20% acetic acid in THF and allowed to warm to RT. Water (2.5 mL) was added and the resulting solution was filtered through a pad of CELITE. The pad was washed thoroughly with ethyl acetate. The filtrate was extracted with ethyl acetate (3×). The combined organic extracts were washed 1× with saturated aq. NaCl. The organic fraction was dried with anhydrous Na2SO4 and filtered. The filtrate concentrated in vacuo. The residue was purified by flash chromatography (230-400 mesh silica) with a gradient of 15-20% ethylacetate-petroleum ether mixture to afford methyl 2-((R,E)-3-(((R)-tert-butylsulfinyl)imino)-1-hydroxy-4-methylpentyl)thiazole-4-carboxylate 52 (9.0 g, 47%) as a pale yellow viscous oil. 1H NMR (CDCl3) (400 MHz) delta 1.17-1.06 (m, 6H), 1.23 (s, 9H), 2.88-2.84 (m, 1H), 3.37-3.34 (m, 2H), 3.94 (s, 3H), 5.17-5.09 (m, 1H), 6.63 (d, 1H, J=13.2 Hz), 8.16-8.13 (d, 1H, J=13.2 Hz); MS (ESI+) m/z 361.0 (M+H)+.

921927-88-0, As the paragraph descriping shows that 921927-88-0 is playing an increasingly important role.

Reference：
Patent; Bristol-Myers Squibb Company; PEREZ, Heidi L.; WEI, Donna; BORZILLERI, Robert M.; GANGWAR, Sanjeev; SCHROEDER, Gretchen M.; CHENG, Heng; SCHMIDT, Robert J.; (58 pag.)US2016/130299; (2016); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

103878-58-6, 5-Bromothiazole-4-carboxylic acid is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step 12-(5-Bromo-thiazol-4-yl)-5-methyl- 1 H-benzoimidazole A solution of 5-bromo-thiazole-4-carboxylic acid (1.37 g, 6.59 mmol, commercially available from Combi-blocks), diisopropylethylamine (1.49 mL, 8.57 mmol), 4-methyl-beiizene-1,2- diamine (0.88 g, 7.25 mmol) in DMF (11 mL) at room temperature was treated with TBTU (2.75 g, 8.57 mmol) and the mixture stirred at room temperature for 18 h. The solvents were thenevaporated under vacuum and the residue partitioned between ethyl acetate and saturated solution of sodium bicarbonate, the organics were collected and dried with magnesium sulfate and then concentrated under vacuum. The crude mixture was dissolved in acetic acid (12 mL), transferred to microwave vial and the mixture was heated at 150 C in a microwave reactor for 1.5 h. After solvent evaporation, the residue was dissolved in dichioromethane, washed with saturated solution of sodium bicarbonate, dried with magnesium sulfate and concentrated under vacuum to yield 2-(5-bromo-thiazol-4-yl)-5-methyl-1H-benzoimidazole (1.93 g, crude,quantitative yield for two steps) as a beige solid that was used into the next step without further purification. ?H NMR (CHLOROFORM-d) 3: 8.82 (s, 1H), 7.64 (d, J = 7.9 Hz, iH), 7.47 (s, 1H), 7.15 (d, J = 8.3 Hz, 1H), 2.50 (s, 3H); LCMS (El/Cl) m/z: 293.9, 295.9 [M + H]., 103878-58-6

The synthetic route of 103878-58-6 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; BHAGIRATH, Niala; DOMINIQUE, Romyr; KENNEDY-SMITH, Joshua; LUCAS, Matthew C.; PADILLA, Fernando; WO2014/64134; (2014); 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.

The (4-formylphenyl)boronic acid 118 (0.30 g, 2.0 mmol), 2-bromo-l,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 (2mL) 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, 3034-53-5 2-Bromothiazole 76430, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; SHIH, Chuan; NATIONAL HEALTH RESEARCH INSTITUTES; ACADEMIA SINICA; CHEN, Chih-Hao; CHEN, Chiung-Tong; WANG, Hwei-Jiung; HUANG, Kai-Fa; (130 pag.)WO2020/47360; (2020); 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

3034-53-5, 2-Bromothiazole (13.0 g, 1.0 eq), 1-methyl-imidazole (2.0 eq), Cul (0.05 eq) and K4[Fe(CN)6] (0.1 eq) were combined in 80 mL of dry NMP and heated in a sealed tube at 140 C for 16h. This mixture was extracted with EtOAc and solvent was removed from the organic fraction to give thiazole-2-carbonitrile (compound2-Im-2).

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

Reference：
Patent; ELAN PHARMACEUTICALS, INC.; GALEMMO, Robert, A., Jr.; ARTIS, Dean, Richard; YE, Xiaocong, Michael; AUBELE, Danielle, L.; TRUONG, Anh, P.; BOWERS, Simeon; HOM, Roy, K.; ZHU, Yong-Liang; NEITZ, R., Jeffrey; SEALY, Jennifer; ADLER, Marc; BEROZA, Paul; ANDERSON, John, P.; WO2011/79114; (2011); A1;,
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

At -78 C,11BuLi/Hex(2.5M) (28.5 mL, 71.4 mmol) was added dropwise into the solution of 6- carboxybenzothiazole (6.57 g, 37 mmol) in THF (450 mL) over 25 minutes. After the mixture was stirred for additional half an hour, the solution of Boc-HN-Arg(Mtr) Weinreb amide (1.63 g, 3.08 mmol) in THF (60 mL) was added slowly over 20 minutes at -78 C. After the addition then the mixture was stirred at -24 C to -20 C for 1.5 hours. The reaction was quenched with saturated aqueous NH4C1 (270 mL). The layers were separated and the aqueous layer was extracted with AcOEt. The organic phase was collected and washed with water, 5% citric acid, then dried with Na2SO4 and concentrated. The resulting residue was purified by silica gel chromatography with CH2C12/MeOH combination as eluent to give the title compound (0.91 g) in 46% yield. ?H NMR (400 MHz, METHANOL-d4) oe ppm 1.43 (s, 9 H) 1.66 (m, 4 H) 2.03 (s, 3 H) 2.54 (s, 3 H) 2.60 (s, 3 H) 3.22 – 3.29 (m, 2 H) 3.80 (s, 3 H)5.18 – 5.41 (m, 1 H) 6.55 (s, 1 H) 8.20 (m, 2 H) 8.79 (s, 1 H). MS(ESI): found: [M + Hj,648.4., 3622-35-3

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

Reference：
Patent; WASHINGTON UNIVERSITY; JANETKA, James,, W.; HAN, Zhenfu; HARRIS, Peter; KARMAKAR, Partha; (163 pag.)WO2016/144654; (2016); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica

182344-56-5, 2-Chloro-4-fluorobenzo[d]thiazole is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a mixture of (lS,3S)-3-((3-(tetrahydro-2H-pyran-4-yl)pyrazin-2- yl)oxy)cyclobutanamine hydrochloride (see PREPARATION 5D, 200 mg, 0.8 mmol) in NMP (4 mL) was added 2-chloro-4-fluoro-benzothiazole (150 mg, 0.8 mmol) and DIEA (229 mg, 1.6 mmol), then heated to 180C for 2 h in microwave. The reaction mixture was diluted with water (10 mL), extracted with ethyl acetate (20 mL), washed with water and brine, dried over Na2S04 and concentrated. The residue was purification by prep-HP C to give the title compound (30 mg, yield 9%)., 182344-56-5

182344-56-5 2-Chloro-4-fluorobenzo[d]thiazole 2049864, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; AMGEN INC.; ALLEN, Jennifer; FROHN, Michael; HARRINGTON, Paul; PICKRELL, Alexander; RZASA, Robert; SHAM, Kelvin; HU, Essa; WO2011/143366; (2011); A1;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica