gem-Difluorocyclopropanes: an improved method for their preparation
作者:Yves Bessard、Ulrich Müller、Manfred Schlosser
DOI:10.1016/s0040-4020(01)87828-5
日期:1990.1
Catalytic hydrogenolysis of cyclopropanes: Metal insertion into a saturated carbon—carbon bond as the key step
作者:Yves Bessard、Manfred Schlosser
DOI:10.1016/s0040-4020(01)86379-1
日期:1991.1
Hydrogenolytic ring cleavage of gem-difluorocydopropanes occurs exclusively at the carbon—carbon bond opposite to the halogen-bearing center and affords mainly gem-difluoroalkanes. The intermediacy of catalyst/cyclopropane derived adducts (e.g., palladacyclobutanes or 1,3-dipal]adiopropanes) is postulated in order to rationalize the formation of monofluorinated and halogen-free by-products and, in