2,2-二硫代双(苯甲腈) 在
氮 作用下,
以
异丙醇 为溶剂,
反应 25.0h,
以3-(2-Cyanophenylthio)-1,2-benzisothiazole was formed in 69% yield by HPLC assay的产率得到3-[(2-cyanophenyl)thio]-1,2-benzisothiazole
The present invention relates to a pro-drug of ziprasidone or pharmaceutically acceptable salts thereof, processes for its preparation, and pharmaceutical compositions and methods of treatment comprising said pro-drug.
本发明涉及赛派拉酮的前药或其药用盐,以及其制备方法、包含该前药的药物组合物和治疗方法。
New Disulfide Route to 3-(1-Piperazinyl)-1,2-benzisothiazole. Nucleus for Atypical Antipsychotic Drugs
作者:Stanley W. Walinsky、Darrell E. Fox、John F. Lambert、Terry G. Sinay
DOI:10.1021/op980210k
日期:1999.3.1
A new, one-step commercial process for the preparation of 3-(1-piperazinyl)-1,2-benzisothiazole hydrochloride, a key intermediate for the syntheses of some new "atypical antipsychotic" drugs, was developed. Reaction of bis(2-cyanophenyl) disulfide with excess piperazine at 120-140 degrees C for 3-24 h in the presence of small amounts of DMSO and 2-propanol formed 3-(1-piperazinyl)-1,2-benzisothiazole in 75-80% yields. The DMSO oxidized the liberated 2-mercaptobenzonitrile to regenerate bis(2-cyanophenyl) disulfide, thereby enabling the utilization of both halves of the symmetrical disulfide to generate product. The reaction mechanism for the conversion of the bis(2-cyanophenyl) disulfide to 3-amino-1,2-benzisothiazole involves the formation of ring opened sulfenamide and benzamidine intermediates and then their subsequent ring closure to regenerate the 1,2-benzisothiazole nucleus. A safe, efficient, and robust process to prepare 3-(1-piperazinyl)-1,2-benzisothiazole under very concentrated reaction conditions was developed and successfully scaled up in the pilot plant to support the development of ziprasidone.
Pro-drugs of 5-(2-(4-(1,2-benzisothiazol-3-yl)-1-piperazinyl)ethyl)-6-chloro-1,3-dihydro-2h-indol-2-one
申请人:PFIZER INC.
公开号:EP0790236B1
公开(公告)日:2003-11-19
PROCESSES AND INTERMEDIATES FOR PREPARING 3-(1-PIPERAZINYL)-1,2-BENZISOTHIAZOLE