The coupling of organic groups by the electrochemical reduction of organic halides: Catalysis by 2,2′-bipyridinenickel complexes
作者:Yolande Rollin、Michel Troupel、Dennis G. Tuck、Jacques Perichon
DOI:10.1016/0022-328x(86)80118-8
日期:1986.4
The electrochemical reduction of a dilute solution of NiX2bipy (bipy = 2,2′-bipyridine) in N-methylpyrrolidone gives the corresponding Ni0 complex, which undergoes oxidative addition with an excess of an organichalide RX to form RNiX. Decomposition of RNiX gives the dimer R2 in good yield and nickel(II). The nickel(0) species is regenerated to give an electrocatalytic process. The possible mechanism
Metal catalysis in organic reactions. Part 13. The reaction of 3-en-1-ynes with trialkylalanes: influence of transition-metal complexes
作者:Anna Maria Caporusso、Giampaolo Giacomelli、Luciano Lardicci
DOI:10.1039/p19810001900
日期:——
The reaction between trialkylalanes and 3-alkyl-, 4-alkyl-, or 3,4-dialkyl-but-3-en-1-ynes (1) leads to products which correspond to metallation, reduction, and carbalumination processes. The extent of such reactions, and the regio- and stereo-selectivity of the carbalumination, are dependent on the enyne used. A mechanism is proposed involving tautomeric equilibria among several α-unsaturated organoaluminum