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
A Conformationally Controlled Regioselective Rearrangement of 2-Substituted 1-Alkynylcyclopropanols to 2-Cyclopenten-1-ones via Hexacarbonyldicobalt Complex
作者:Nobuharu Iwasawa、Mari Iwamoto
DOI:10.1246/cl.1993.1257
日期:1993.7
The rearrangement of hexacarbonyldicobalt-complexed 2-substituted 1-alkynylcyclopropanol derivatives is conformationallycontrolled to give 4- or 5-substituted 2-cyclopentenones regioselectively. In the cases of the reactions of 2-monosubstituted 1-alkynylcyclopropanol derivatives, either regioisomer can be selectively obtained by the appropriate choice of the substrates.
六羰基二钴络合的 2-取代的 1-炔基环丙醇衍生物的重排受到构象控制,以区域选择性地得到 4-或 5-取代的 2-环戊烯酮。In the cases of the reactions of 2-monosubstituted 1-alkynylcyclopropanol derivatives, either regioisomer can be selectively obtained by the appropriate choice of the substrates.