申请人:MARUBISHI YUKA KOGYO KABUSHIKI KAISHA
公开号:EP0211140A1
公开(公告)日:1987-02-25
A process for the preparation of bis-(4-hydroxy-3,5-dibromophenyl)-sulfone derivatives represented by the following formula:
which comprises converting bis-(4-hydroxy-3,5-dibromophenyl)-sulfone to an allyl ether in the presence of an alkali and, if desired, brominating the obtained bis-(4-allyloxy-3,5-dibromophenyl)-sulfone, wherein bis-(4-hydroxy-3,5-dibromophenyl)-sulfone is allyl-etherified with allyl chloride in the presence of a bromide and/or an iodide, and/or a substance capable of forming a bromide and/or an iodide by reaction with the alkali.
一种制备下式所代表的双-(4-羟基-3,5-二溴苯基)-砜衍生物的工艺:该工艺包括在碱存在下将双-(4-羟基-3,5-二溴苯基)-砜转化为烯丙基醚,如果需要,将得到的双-(4-烯丙氧基-3,5-二溴苯基)-砜溴化,其中双-(4-羟基-3,5-二溴苯基)-砜在溴化物和/或碘化物和/或能够与碱反应生成溴化物和/或碘化物的物质存在下与烯丙基氯进行烯丙基醚化。