申请人:Bayer Aktiengesellschaft
公开号:US05952498A1
公开(公告)日:1999-09-14
The invention relates to a process and intermediates for the preparation of enantiomerically pure cycloalkanoindolecarboxylic acids and azaindolecarboxylic acids and pyrimido\x9b1,2a!indolecarboxylic acids and their activated derivatives, characterized in that the tolyl acetic acid is first esterified with a chiral alcohol, then diastereoselective substitution at .alpha.-carbon atoms is carried out and this product is halogenated in the tolyl group and then reacted with appropriate cycloalkanoindoles, cycloalkanoazaindoles or pyrimido\x9b1,2a!indoles. It is possible by this method to prepare specifically, in high purity, the enantiomerically pure carboxylic acids which are intermediates for valuable medicaments.
本发明涉及一种制备对映纯环烷基吲哚羧酸、氮杂吲哚羧酸和嘧啶并[1,2-a]吲哚羧酸及其活性衍生物的过程和中间体。其特征在于,首先将对甲苯乙酸酯化为手性醇,然后进行α-碳原子的对映选择性取代,再在对甲苯基上卤化,最后与适当的环烷基吲哚、环烷基氮杂吲哚或嘧啶并[1,2-a]吲哚反应。通过该方法可以高纯度地制备对映纯的羧酸,这些羧酸是有价值的药物中间体。