申请人:DAHMANN Georg
公开号:US20150087829A1
公开(公告)日:2015-03-26
The present invention relates to compounds of formula I
wherein R
S
denotes F or CF
3
, R
a
denotes H or C
1-4
-alkyl and Z denotes a leaving group or an optionally substituted or protected hydroxyl group, suitable as intermediates in the synthesis of indanyloxydihydrobenzofuranylacetic acids, which are GPR40 agonists, to a process for preparing these intermediates and to the process for preparing the GPR40 agonists making use of an asymmetric catalytic hydrogenation reaction in the presence of a transition metal catalyst and a chiral auxiliary.
本发明涉及以下式I的化合物,其中RS代表F或CF3,Ra代表H或C1-4-烷基,Z代表一个离去基团或一个可选择取代或保护的羟基团,适用于合成茚基氧基二氢苯并呋喃乙酸的中间体,这些化合物是GPR40激动剂,以及制备这些中间体的方法和利用不对称催化氢化反应来制备这些GPR40激动剂的方法,其中该氢化反应在过渡金属催化剂和手性辅助剂的存在下进行。