Propanolamine derivatives, process for preparation of 3-n-methylamino-1-(2-thienyl)-1-propanols and process for preparation of propanolamine derivatives
申请人:Inoue Yoshiki
公开号:US20060167278A1
公开(公告)日:2006-07-27
The present invention provides means for preparing a racemate or an optically active substance (S- or R-isomer) of 3-N-methylamino-1-(2-thienyl)-1-propanol represented by the following general formula (I):
wherein R
1
represents any of a hydrogen atom, a C1-8 acyl group, a substituted or substituted C1-8 alkyloxycarbonyl group and a substituted or substituted phenyloxycarbonyl group and R
2
represents any of a hydrogen atom, a C1-8 alkyl group, a substituted or substituted benzyl group, a C1-8 acyl group, a substituted or substituted C1-8 alkyloxycarbonyl group and a substituted or substituted phenyloxycarbonyl group, with the exception that R
1
is a hydrogen atom and R
2
is a methyl group or a hydrogen atom, in a simple manner at low cost and in high yield.
本发明提供了一种制备以下通式(I)所表示的3-N-甲基氨基-1-(2-噻吩基)-1-丙醇的外消旋体或光学活性物质(S-或R-异构体)的方法:
其中R1表示氢原子、C1-8酰基、取代或取代的C1-8烷氧羰基基团和取代或取代的苯氧羰基基团中的任意一种,R2表示氢原子、C1-8烷基、取代或取代的苯甲基基团、C1-8酰基、取代或取代的C1-8烷氧羰基基团和取代或取代的苯氧羰基基团中的任意一种,但R1为氢原子且R2为甲基基团或氢原子的方法,能够简单、低成本、高产率地实现。