申请人:Shell Internationale Research Maatschappij, B.V.
公开号:US05153330A1
公开(公告)日:1992-10-06
A compound of the general formula ##STR1## in which X represents a chlorine or bromine atom, R.sup.1 represents a hydrogen atom, a C(1-6) alkyl group, a benzyl group or a phenyl group optionally substituted by a C(1-6) alkyl group, and R.sup.2 represents the group CN or the group COOR.sup.3 in which R.sup.3 represents a C(1-6) alkyl group, a process for the preparation of a compound of formula (I), and the use of a compound of formula (I) in the preparation of a compound of the general formula. ##STR2## in which R.sup.1 is as defined above and R.sup.4 represents an amino group or a hydroxyl group.
通式为##STR1##的化合物,其中X代表氯或溴原子,R.sup.1代表氢原子,C(1-6)烷基,苄基或苯基,可以选择性地被C(1-6)烷基取代,而R.sup.2代表CN基团或COOR.sup.3基团,其中R.sup.3代表C(1-6)烷基,一种制备式(I)化合物的方法,以及使用式(I)化合物制备通式##STR2##中的化合物的用途,其中R.sup.1如上所定义,而R.sup.4代表氨基团或羟基团。