申请人:SMITH KLINE & FRENCH LABORATORIES
LIMITED
公开号:EP0163506A2
公开(公告)日:1985-12-04
A process for preparing compounds of the formula (II):
and salts thereof, wherein R' is protected hydroxy, which comprises reacting an anion of the formula (IIII):
wherein R' is as hereinbefore defined, with a compound of the formula (IV): X-CH2CO2-M+ whereinXis a leaving group and M+ is a counter-ion, and if desired interconverting an acid of the formula (ll) with a salt thereof.
The products are intermediates in the preparation of histamine antagonists.
一种制备式 (II):
及其盐(其中 R'为受保护的羟基)的工艺,该工艺包括使式(III)的阴离子与式(IV)的化合物反应:
其中 R' 如前定义,与式 (IV) 的化合物反应:X-CH2CO2-M+,其中 X 是离去基团,M+ 是反离子,如果需要,还可以将式(ll)的酸与其盐相互转化。
这些产物是制备组胺拮抗剂的中间体。