1-(1-炔基) 环丙醇向 2-环戊烯-1-酮的新重排是在其炔基部分与八羰基二钴 (Co2(CO8)) 络合后进行的。1-(1-炔基) 环丙醇在其炔烃末端具有广泛的取代基,以良好的产率重排为相应的 3-取代的 2-环戊烯-1-酮。In case of the reactions of 1-alkynylcyclopropanols with an alkyl substituent on the cyclopropane ring, either 4-substituted or 5-substituted 2-cyclopenten-1-ones could be selectively obtained by appropriate choice of stereochemistry and protective group of the substrates. 这种重排成功地应用于环戊烯酮环化成环烯烃的反应。根据
Rhodium(I)-Catalyzed C−C Bond Activation of Siloxyvinylcyclopropanes with Diazoesters
作者:Sheng Feng、Fanyang Mo、Ying Xia、Zhenxing Liu、Zhen Liu、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201609642
日期:2016.12.5
The rhodium(I)‐catalyzed C−C bond activation reaction of siloxyvinylcyclopropanes with diazoesters demonstrates a novel mode of C−C bond cleavage of siloxyvinvylcyclopanes. The alkene products were obtained as single E‐configured isomers in good yields. A σ,η3‐allyl rhodium complex, which has been previously proposed as the key intermediate in rhodium(I)‐catalyzed cycloaddition of vinylcyclopropanes