Synthesis of cyclopentadienyl enaminonitriles from α-chlorovinyl p-tolyl sulfoxides and acetonitrile with three consecutive carboncarbon bond-formations
作者:Tsuyoshi Satoh、Hiroyuki Ota
DOI:10.1016/s0040-4039(99)00341-x
日期:1999.4
Treatment of α-chlorovinyl p-tolyl sulfoxides with 5-equivalents of lithium carbanion of acetonitrile at −78 °C to room temperature afforded cyclopentadienyl enaminonitriles in high yields with three consecutive carboncarbon bond-formations. The mechanism of this reaction and somereactions of the enaminonitriles are reported.
Reaction of 1-Chlorovinyl p-Tolyl Sulfoxides with Carbanion of Acetonitrile: A Novel Synthesis of Cyclopentanone Derivatives with Three Consecutive Carbon–Carbon Bond-Formations via the Enaminonitriles
作者:Tsuyoshi Satoh、Hiroyuki Ota
DOI:10.1016/s0040-4020(00)00187-3
日期:2000.7
Treatment of 1-chlorovinyl p-tolyl sulfoxides derived from ketones with cyanomethyllithium gave cyclopentadienyl enamino-nitriles in high yields with three consecutive carbon-carbon bond-formations. However, the 1-chlorovinyl p-tolyl sulfoxides derived from aldehydes did not give good results. The mechanism of this reaction and the reaction of the enaminonitriles to convert cyclopentanone derivatives were investigated. Several alpha-carbanion of nitriles other than acetonitrile added to the 1-chlorovinyl p-tolyl sulfoxides at low temperature in good yield; however, they did not cyclize upon warming to room temperature. (C) 2000 Elsevier Science Ltd. All rights reserved.