2-Cyclopropen-1,1-dicarbonsäure- und Bicyclo[1.1.0]butan-2,2-dicarbonsäure-diester
作者:Günther Maier、Bernd Wolf
DOI:10.1055/s-1985-31366
日期:——
2-Cyclopropene-1,1-dicarboxylic and Bicyclo[1.1.0]butane-2,2-dicarboxylic Diesters Cyclopropenation of bis[trimethylsilyl]-acetylene with diazomalonic esters affords 2,3-disilylated cyclopropene-1,1-dicarboxylic esters which are desilylated to 2-cyclopropene-1,1-dicarboxylic esters by treatment with potassium fluoride/crown ethers in acetonitrile. Two independent routes to silylated and non-silylated bicyclobutane-2,2-dicarboxylic esters are described.
Transition-metal-free three-component reaction of cyclopropenes, aldehydes and amines
作者:Hang Zhang、Bo Wang、Heng Yi、Tong Sun、Yan Zhang、Jianbo Wang
DOI:10.1039/c6cc06743c
日期:——
A transition-metal-free three-component reaction of cyclopropene, aldehyde and amine is reported. The reaction is a new demonstration of formal [3+2] cycloaddition triggered by ring-opening of cyclopropenes bearing electron-withdrawing substitutes. The...