氯化二甲基-3,3-二氯-2-丙烯基锍的制备和反应

Synthesis and Reactions of Dimethyl-3,3-dichloro-2-propenylsulfonium Chloride

以二甲硫醚和1,1,3-三氯-1-丙烯反应合成了锍盐2,经碱处理形成(?)叶立德1;1不经分离能顺利地对羰基加成,制得带偏二氯乙烯基的环氧衍生物3—9,与α,β-不饱和酮反应生成相应的环丙烷衍生物10、ll。

The sulfonium salt(CH_3)_2SCH_2CH=CCl_2Cl(2)was synthesized from dimethyl sulfide and 1,1,3-trichloro-1-propene.Without isolation,the salfoium ylide Cl_2C=CHCHS(CH_3)_2(1) generated from treating 2 with sodium ethoxide can react with carbonyl compounds directly to give the corresponding epoxides (3—9).1 also reacted with α,β-unsaturated ketones to give the corresponding cyclopropanes 10 and 11.