Regio-and stereo-specific reduction of conjugated and non-conjugated triple bonds by activated zinc powder
作者:Marc H. P. J. Aerssens、Lambert Brandsma
DOI:10.1039/c39840000735
日期:——
Regio-as well as stereo-specificreductions of a wide variety of acetylenic derivatives have been carried out in absolute ethanol with zincpowderactivated with 1,2-dibromoethane, and with zincpowderactivated successively with dibromoethane and copper(I) bromide, the first reagent less powerful and more selective than the second one.
addition of alkylcopper compounds to 1-alkynes, are transformed with retention to various ethylenic structures; 1-deutero-1-alkenes, symmetrical conjugated dienes, 1-iodo-1-alkenes, di- or tri-substituted alkenes and primary or secondary allylic alcohols.
Normant,J.-F. et al., Bulletin de la Societe Chimique de France, 1974, p. 1656 - 1660
作者:Normant,J.-F. et al.
DOI:——
日期:——
AERSSENS, M. H. P. J.;BRANDSMA, L., J. CHEM. SOC. CHEM. COMMUN., 1984, N 12, 735-736
作者:AERSSENS, M. H. P. J.、BRANDSMA, L.
DOI:——
日期:——
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