Succinic acid diester derivative, process for production thereof, and use of the derivative in the production of pharmaceutical preparation
申请人:Inagaki Takashi
公开号:US20100076203A1
公开(公告)日:2010-03-25
The present invention provides with a process of preparing an optically active succinimide derivative, which is a key intermediate for production of ranirestat. A compound (3) is easily prepared by treating the derivative of succinic acid diester of the formula (2):
wherein R
1
is an amino group protected with a group removed by hydrogenolysis or a tert-butoxycarbonylamino group and R
2
is an ethyl group optionally substituted with one or two methyl group(s) at α-position, provided that R
2
is not a tert-butyl group when R
1
is a tert-butoxycarbonylamino group; with alkali metal alkoxide and the compound (3) can be an important intermediate for production of ranirestat.
Pyrrole synthesis using a tandem Grubbs’ carbene–RuCl3 catalytic system
作者:Nicolai Dieltiens、Christian V. Stevens、David De Vos、Bart Allaert、Renata Drozdzak、Francis Verpoort
DOI:10.1016/j.tetlet.2004.10.044
日期:2004.11
A straightforward pyrrole synthesis from diallylamines is developed by using a tandem catalyst system leading to ring-closing metathesis with the second generation Grubbs' catalyst (10%) followed by dehydrogenation in the presence of RuCl3 x H2O (2%). (C) 2004 Elsevier Ltd. All rights reserved.
The Alkylation of MEthyl 2-(1-Pyrrolyl)acetate. A New Synthetic Method of a-Amino Acids
作者:Choji Kashima、Tatsuya Maruyama
DOI:10.3987/com-88-4586
日期:——
KASHIMA, CHOJI;MARUYAMA, TATSUYA, HETEROCYCLES, 27,(1988) N, C. 1727-1730