Synthesis of (trimethylsilyl)(cyclopropyl)acetylenes and terminal cyclopropylacetylenes via an arsonium ylide under phase-transfer conditions
作者:Yanchang Shen、Qimu Liao
DOI:10.1016/0022-328x(89)85204-0
日期:1989.7
The phase-transfer reaction of 3-(trimethylsilyl)-2-propynylidenetriphenylarsorane generated from the corresponding arsonium salt and aqueous sodium hydroxide with substituted chalcones gave (trimethylsilyl)(cyclopropyl)acetylenes in 83–98% yields with high stereoselectivity. In all cases exclusively one isomer is obtained. Addition of methanol gives the desilylated terminal cyclopropylacetylenes in