Acid catalyzed ring opening of α-bis(methylthio)methylenealkyl cyclopropyl ketones: An intramolecular alkylation approach to substituted cyclopentanones
作者:B Deb、C.V Asokan、H Ila、H Junjappa
DOI:10.1016/s0040-4039(00)87848-x
日期:——
α-Bis(methylthio)methylenealkyl cyclopropylketones , prepared by the addition of dimethyloxosulphonium methylide to the respective α-cinnamoylketene dithioacetals , undergo facile acid catalyzed intramolecular cyclization with participation of bis(methylthio)methylene double bond to give substituted cyclopentanones - and - in good yields.