3-HYDRAZINO-2,5-DIOXOPYRROLIDINE-3-CARBOXYLATE, PROCESS FOR PRODUCTION OF THE SAME, AND USE OF THE SAME
申请人:TANAKA Daisuke
公开号:US20110201807A1
公开(公告)日:2011-08-18
The present invention provides 3-hydrazino-2,5-dioxopyrrolidine-3-carboxylates of the formula (I):
wherein R
1
is a C
1-6
alkyl group, etc., R
2
is a hydrogen atom or a COOR
3
group, wherein R
3
is a tert-C
4-6
alkyl group, a 2,2,2-trichloroethyl group or a benzyl group in which the benzene ring moiety may be optionally substituted by one or two atoms or groups independently selected from the group consisting of a halogen atom, a C
1-4
alkyl group, a C
1-4
alkoxy group, a cyano group and a nitro group, and a salt thereof, which are useful as a novel intermediate for preparing tetrahydropyrrolo[1,2-a]pyrazin-4-spiro-3′-pyrrolidine derivatives such as Ranirestat being promising therapeutic agents for diabetic complications in a short process and in an economically advantageous and safe manner, and the process for preparing the same.
本发明提供的公式(I)的3-肼基-2,5-二氧代吡咯烷-3-羧酸盐,其中R1是C1-6烷基,R2是氢原子或COOR3基团,其中R3是tert-C4-6烷基,2,2,2-三氯乙基基团或苄基,在苄环取代基团中,苯环取代基团可以选择地由卤素原子、C1-4烷基、C1-4烷氧基、氰基和硝基中的一个或两个原子或基团独立地取代,并且其盐,这些化合物是制备四氢吡咯并[1,2-a]吡嗪-4-螺-3'-吡咯烷衍生物(例如Ranirestat)的新型中间体,这些衍生物是治疗糖尿病并发症的有前途的治疗剂,具有短的过程时间、经济优势和安全性,并且提供了制备这些化合物的方法。