申请人:Glaxo Group Limited
公开号:US04413135A1
公开(公告)日:1983-11-01
The invention relates to a process for the preparation of ranitidine of formula (I) ##STR1## which comprises reacting a thiol of formula (II) ##STR2## with an alkylating agent of formula (III) ##STR3## where L is a leaving group, preferably halogen. The invention also relates to novel intermediates, the thiol of formula (II) ##STR4## in the form of a stable acid addition salt, and the isothiourea of formula (IV) ##STR5## and stable acid additions salts thereof.
本发明涉及一种制备式(I)的雷尼替丁的方法:##STR1##该方法包括将式(II)的硫醇与式(III)的烷基化剂反应:##STR2##其中L是一个离去基团,优选卤素。本发明还涉及新的中间体,即式(II)的硫醇,以稳定的酸加成盐的形式,以及式(IV)的异硫脲和其稳定的酸加成盐。