Day: March 3, 2022

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.,42270-37-1

6.11. Preparation of f3′-Chloro-biphenyl-4-yl)-f4-thiazol-2-yl-piperazin-l- vl)-methanone; To a solution of l-(thiazol-2-yl)piperazine (ca. 0.915 mmol, prepared from 150 mg 2-bromothiazole according to the methods described in Astles et al., J. Med. Chem., 39: 1423-1432 (1996)), 3′-chloro-biphenyl-4-carboxylic acid (212.9 mg, 0.915 mmol) in CH2Cl2 (4 ml), was added EDC (209.7 mg, 1.098 mmol) and HOBt (148.2 mg, 1.098 mmol). After being stirred overnight, the mixture was treated with EtOAc (50 ml) and water (15 ml). The organic phase was washed with brine (5 ml), dried (MgSO4), filtered, and concentrated under reduced pressure to furnish the crude product. This material was purified by column chromatography (20% acetone/hexanes) to give the title compound (225 mg, 64% for two steps) as a white solid: 1H NMR (CDCl3, 400 MHz) delta 7.64-7.23 (m, 9 H), 6.65 (t, J= 3.6 Hz, 1 H), 4.92 (m, br, 2 H), 3.57 (m, br, 6 H), 3.68 (m, 2 H), 2.14 (m, 2 H), 1.83 (m, 2 H); MS calc’d for C20Hi9ClN3OS [M+H]+: 384; Found: 384.

42270-37-1 2-(Piperazin-1-yl)thiazole 911806, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; LEXICON PHARMACEUTICALS, INC.; WO2008/67121; (2008); 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.15448-99-4,2-Methylbenzo[d]isothiazol-3(2H)-one 1,1-dioxide,as a common compound, the synthetic route is as follows.

EXAMPLE 16 Methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (I; Y=OCH3) To a solution of 9.86 g. (50 mmoles) of N-methylsaccharin and 10.8 ml. of methyl chloroacetate (123.8 mmoles) in 50 ml. of dimethylsulfoxide was added at the rate of 0.15 ml./minute 9.2 g. (170 mmoles) of sodium methoxide in 30 ml. of methanol. After the addition was complete an additional 2.7 g. (50 mmoles) of sodium methoxide in 11 ml. of methanol was added at the same rate for a total addition time of about 6 hours. The reaction mixture was added to 800 ml. of 0.25N hydrochloric acid, and the precipitated product filtered, washed with water and dried, 3.8 g., 15448-99-4

The synthetic route of 15448-99-4 has been constantly updated, and we look forward to future research findings.

Reference：
Patent; Pfizer Inc.; US4483982; (1984); 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.824403-26-1,5-Bromo-2-chlorobenzo[d]thiazole,as a common compound, the synthetic route is as follows.

824403-26-1, To a solution of 5-bromo-2-chlorobenzo[d]thiazole (0.87 g, 3.5 mmol) in ethanol (12 mL) was added isopropylamine solution (1.5 mL) and the mixture was heated for 60 minutes using a Biotage microwave oven at 100C. The reaction mixture was cooled to room temperature. The solvent was removed, the crude product was dissolved in dichlormethane (150 mL) and washed with 1 M NaOH solution, water and brine and dried over Na2S04. The solvent was removed under reduced pressure to give a crude product, which was purified on a silica gel column using an EtOAc and heptane gradient (20/80 => 50/50) to afford the title compound as a solid (0.75 g, 79 %). (0516) 1H-NMR (400 MHz, Chloroform-d) d = 7.67 (d, J = 1.9 Hz, 1 H), 7.43 (d, J = 8.5 Hz, 1 H), 7.19 (dd, J = 8.3, 1.9 Hz, 1 H), 5.47 (s, 1 H), 4.04 – 3.79 (m, 1 H), 1.34 (d, J = 6.5 Hz, 6H).

As the paragraph descriping shows that 824403-26-1 is playing an increasingly important role.

Reference：
Patent; AC IMMUNE SA; NAMPALLY, Sreenivasachary; GABELLIERI, Emanuele; MOLETTE, Jerome; (220 pag.)WO2019/134978; (2019); 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

3622-38-6, o a solution of 2-chloro-5-nitrobenzo[d]thiazole (2.18 g, 10.2 mmol) in EtOH:acetic acid 91 :9 (102 mL) iron powder (5.70 g, 102 mmol) was carefully added. The mixture was refluxed for 1 .5 h before it was filtered. The filtrate was concentrated to about one third of the volume and the pH of the solution was adjusted to pH 8 by adding 10percent aq. NaOH solution. The mixture was extracted with EA (150 mL). The organic extract was washed with brine, dried over Na2S04, filtered and concentrated. The crude product was suspended in EtOH (4 mL), filtered, washed with additional EtOH (0.5 mL) and dried to give the title compound (1 .55 g) as a solid; LC-MS: tR= 0.78 min; [M+H]+= 185.03;1H NMR (400 MHz, D6-DMSO) delta: 7.65 (d, J = 8.7 Hz, 1 H), 7.06 (d, J = 1 .9 Hz, 1 H), 6.79 (dd, J, = 2.0 Hz, J2= 8.7 Hz, 1 H), 5.43 (s, 2 H).

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

15448-99-4, 2-Methylbenzo[d]isothiazol-3(2H)-one 1,1-dioxide is a thiazole compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,15448-99-4

EXAMPLE 7 Methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (I; Y=OCH3) In a manner similar to Example 6, 864 mg. (0.036 mole) of 99% sodium hydride was added over a two hour period to a solution of 2.9 g. (0.015 mole) of N-methylsaccharin and 9.8 g. (0.09 mole) of methylchloroacetate in 10 ml. of dimethylsulfoxide at 40 C. Stirring was continued at 40-45 C. for an additional two hours, and the reaction mixture was poured into 150 ml. of 5% hydrochloric acid solution. The precipitate was filtered and dried to give 3.07 (76%) of the desired product.

15448-99-4 2-Methylbenzo[d]isothiazol-3(2H)-one 1,1-dioxide 27290, athiazole compound, is more and more widely used in various fields.

Reference：
Patent; Pfizer Inc.; US4376204; (1983); A;; ; Patent; Pfizer Inc.; US4483982; (1984); A;,
Thiazole | C3H3NS – PubChem
Thiazole | chemical compound | Britannica