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 cyclopropyl ketones , 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.
α-双(甲硫基)亚甲基烷基环丙基酮是通过在各自的α-肉桂基烯酮二硫缩醛中添加二甲基二甲氧基砜鎓甲基化物而制得的,经过轻度酸催化的分子内环化,并带有双(甲硫基)亚甲基双键,从而得到取代的环戊烷酮-和-良好地合成。产量。