Carbon−Carbon Bond-Forming Reaction of Cyclic Sulfonium Ylides Stabilized by a Carbonyl Group
作者:Yuichi Sawada、Akira Oku
DOI:10.1021/jo0498009
日期:2004.4.1
bearing a cyclic dithioacetal, in the presence of aldehyde and ClTi(Oi-Pr)3, afforded both or one of the CC-bonded products, i.e., ring-enlarged enone 2 and ring-transformed thiophenone 3, that were formed between aldehyde and intermediate bicyclosulfonium ylide. The stereochemistry of the exocyclic CC bond in the products was exclusively Z. The sulfonium atom that transiently composed the ylide was incorporated