3-ethyl-3-phenyl-4-thioxothietan-2-one 在
BF
4(1-)*C
33H
42N
3OSi
(1+) 、
caesium carbonate 作用下,
以
乙醚 、
甲苯 为溶剂,
反应 9.0h,
生成 (4R,5R,E)-5-ethyl-4-(methylthio)-5-phenyl-2-(1-phenylpropylidene)-1,3-oxathian-6-one 、
(4S,5R,E)-5-ethyl-4-(methylthio)-5-phenyl-2-(1-phenylpropylidene)-1,3-oxathian-6-one