The present invention relates to compounds of formula I
wherein RS denotes F or CF3, Ra denotes H or C1-4-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.
本发明涉及式I的化合物,其中RS表示F或
CF3,Ra表示H或C1-4-烷基,Z表示离去基团或可选取代或保护的羟基团,适用于合成indanyloxydihydrobenzofuranyl
乙酸的中间体,这是GPR40激动剂,以及制备这些中间体的方法和利用过渡
金属催化剂和手性辅助剂在不对称催化氢化反应中制备GPR40激动剂的方法。