Process for preparation of 2-amino-6 (alkyl) amino-4,5,6,7-tetrahydrobenzothiazoles
申请人:——
公开号:US20040029936A1
公开(公告)日:2004-02-12
A new process to obtain pramipexole and related products is described. The process involves the reaction of new compounds of formula (6), wherein R is hydrogen or acyl group, R
3
and R
4
are either the same and each of them represents an alkoxy group of 1-4 carbons or they together form a C
2
-C
5
alkylenedioxy group or an oxo-group, with an alkylamine in the presence of a reducing agent or a hydrogen gas with hydrogenation catalyst. A process to obtain new compounds of formula (6) is also described.
描述了一种获取普拉米贝克索和相关产品的新工艺。该工艺涉及新化合物的反应,其化学式为(6),其中R为氢或酰基,R3和R4可以相同,且分别代表1-4碳原子的烷氧基,或它们一起形成一个C2-C5烷二氧基基团或一个氧基团,与一种烷基胺在还原剂或氢气与加氢催化剂的存在下发生反应。还描述了一种获得新化合物的工艺,其化学式为(6)。