申请人:Hoechst Aktiengesellschaft
公开号:US05011940A1
公开(公告)日:1991-04-30
The invention relates to a process for the preparation of compounds of the formula I ##STR1## in which n denotes 1, 2 or 3, R denotes acyl, and R.sup.1 denotes alkyl, cycloalkyl, aralkyl or another carboxyl protective group, which comprises radical cyclization of compounds of the formula II ##STR2## in which n, R and R.sup.1 are as defined above, and Hal denotes chlorine, bromine or iodine, to intermediates in this process, and to their use.
该发明涉及一种制备式I的化合物的过程,其中n表示1、2或3,R表示酰基,R.sup.1表示烷基、环烷基、芳基烷基或另一种羧基保护基团,包括将式II的化合物进行基团环化,其中n、R和R.sup.1如上定义,Hal表示氯、溴或碘,形成该过程中的中间体,并其用途。