申请人:Hisamitsu Pharmaceutical Co., Inc.
公开号:US04400520A1
公开(公告)日:1983-08-23
A process for the preparation of an isoindoline derivative of the following general formula (II): ##STR1## wherein R.sup.2 is a hydrogen atom or lower alkyl group and X is a carboxyl group, carboalkoxy group, amide group or cyano group, which comprises cycling a benzylidene derivative of the following general formula (I) ##STR2## wherein R.sup.1 is a hydrogen atom or lower alkyl group, and R.sup.2 and X are as defined above, in the presence of a reducing agent such as sodium boron hydride. In one embodiment, the benzylidene derivative may be substituted by a reaction mixture containing the same, the reaction mixture being prepared by reacting o-phthalaldehydic acid or its ester with an aniline derivative.
一种制备以下通式(II)的异吲啶衍生物的方法:其中R.sup.2是氢原子或较低的烷基基团,X是羧基、羧醇酯基、酰胺基或氰基,包括在还原剂的存在下循环苯甲亚苄衍生物的方法,该苯甲亚苄衍生物的通式如下(I):其中R.sup.1是氢原子或较低的烷基基团,R.sup.2和X如上所定义,所述还原剂为硼氢化钠。在一种实施例中,苯甲亚苄衍生物可以被替代为含有相同的反应混合物,所述反应混合物是通过将邻苯二甲醛酸或其酯与苯胺衍生物反应制备的。