3-Piperazinobenzisothiazole hydrochloride, cas is 87691-88-1, it is a common heterocyclic compound, the isothiazole compound, its synthesis route is as follows.,87691-88-1
C. 1-{7-[2-(4-Benzo[d]isothiazol-3-yl-piperazin-1-yl)-ethyl]-2,3,4,5- tetrahvdro-benzorblazepin-1-vll-ethanone methanesulfonate; A solution of the title compound from step B (602 mg, 2.39 mmol) in CH3CN (20 mL) was treated with 3-piperazin-1-yl-benzo [agisothiazole HCI (683 mg, 2.67 mmol), Nal (406 mg, 2.71 mmol), and K2CO3 (1.09 g, 7.86 mmol). The mixture was heated to reflux under N2 for 43 h, then allowed to cool. The mixture was diluted with H20 (100 mL) and extracted with CH2CI2 (3 x 100 mL). The combined organic layers were dried over Na2SO4, decanted, and the solvent was removed in vacuo. The residue was purified by flash column chromatography (silica gel, EtOAc) to give a white solid residue (430 mg, 0.99 mmol, 41%). The residue was dissolved in EtOAc (10 mL) and treated with a solution of CH3SO3H in Et20 (0.5 mL, 2M, 1 mmol). After stirring for 5 min, the resulting precipitate was isolated by filtration, washed with Et20 (3 x 10 mL), and dried in a vacuum oven at 50 C for 3 d to give the title compound (465 mg, 89%) as a white powder: mp 189-190 C (dec) ;’H NMR (300 MHz, CDCI3) 8 11.. 76 (s, 1 H), 7.85 (t, J = 7. 8 Hz, 2 H), 7.51-7. 56 (m, 1 H), 7.39-7. 45 (m, 1 H), 7.14-7. 18 (m, 2 H), 7.08 (d, J= 7.8 Hz, 1 H), 4.66-4. 70 (m, 1 H), 4.11-4. 20 (m, 2 H), 3.95-4. 03 (m, 2 H), 3.68 (d, J = 11.3 Hz, 2 H), 3.13-3. 34 (m, 6 H), 2.91 (s, 3 H), 2.68-2. 78 (m, 2 H), 2.51-2. 59 (m, 1 H), 1.74-2. 00 (m, 3 H), 1.83 (s, 3 H), 1.32-1. 40 (m, 1 H); ESI MS m/z 435 [C25H30N40S + H] + ; Rr 0. 35 (silica gel, 95: 5 EtOAc/MeOH); HPLC) >99% (AUC), tR = 12.68 min. Anal. Calc’d for C25H3oN40S’CH3SOsH : C, 58.84 ; H, 6.46 ; N, 10.56. Found: C, 58.56 ; H, 6.49 ; N, 10. 31.
87691-88-1 is used more and more widely, we look forward to future research findings about 3-Piperazinobenzisothiazole hydrochloride
Reference£º
Patent; WARNER-LAMBERT COMPANY LLC; WO2005/66165; (2005); A1;,
Isothiazole – Wikipedia
Isothiazole – ScienceDirect.com