Tandem reductive lithiations ? Carbanionic cyclizations yielding sulfur stabilized cyclopropyl- and cyclobutylcarbinyllithiums
作者:Fangping Chen、Boguslaw Mudryk、Theodore Cohen
DOI:10.1016/s0040-4020(98)01141-7
日期:1999.3
nucleophilic addition to the vinyl sulfide group, usually at −78 °C, leading to a phenylthio-stabilized cyclopropyl- or cyclobutylcarbinyllithium. The substrates were prepared by Wittig or Peterson olefination of carbonyl compounds which were in turn generated by conjugate addition of thiophenol or of the cuprate of a phenylthio-stabilized carbanion to an α,β-unsaturated carbonyl compound.