Copper complexes generated in situ from CuCl2, alkylGrignardreagents, and 1,3‐dienes play important roles as catalytic active species for the 1,2‐hydroalkylation of 1,3‐dienes by alkylfluorides through CF bond cleavage. The alkyl group is introduced to an internal carbon atom of the 1,3‐diene regioselectively, thus giving rise to the branched terminal alkene product.
‘One-pot’ synthesis of 1,1-disubstituted cyclopropanes in the presence of metal complex catalysts
作者:Usein M Dzhemilev、Askhat G Ibragimov、Leyla O Khafizova、Ilfir R Ramazanov、Dina F Yalalova、Genrikh A Tolstikov
DOI:10.1016/s0022-328x(01)01168-8
日期:2001.11
method for the synthesis of 1,1-disubstituted cyclopropanes starting from olefins, acetylenes and AlEt3 in the presence of Cp2ZrCl2, via a step involving in situ formation of aluminacyclopentanes and aluminacyclopentenes, respectively, was developed. Five-membered organoaluminium compounds obtained without preliminary isolation are transformed to cyclopropanes under the effect of Ni(acac)2 in combination
作者:A. G. Ibragimov、A. P. Zolotarev、R. R. Muslukhov、S. I. Lomakina、U. M. Dzhemilev
DOI:10.1007/bf00696970
日期:1995.1
A novel regioselective method has been developed for the synthesis of 2-substituted 1,3-butadienes by beta-vinylation of alpha-olefins with AlEt(3) in the presence of Ni- and Zr-containing catalysts.
Regio- and stereoselective synthesis for a novel class of organoaluminium compounds — substituted aluminacyclopentanes and aluminacyclopentenes assis
作者:U.M. Dzhemilev、A.G. Ibragimov
DOI:10.1016/0022-328x(94)88022-0
日期:1994.2
A novel regio- and stereoselective method has been developed for the catalytic cyclometallation of olefins and acetylenes with alkylalanes in the presence of Cp(2)ZrCl(2), to give in one stage high yields of 3-substituted aluminacyclopentanes and aluminacyclopentenes. Applications of these reactions to a wide range of linear and cyclic olefins and to those containing functional substituents have been studied. The transformation of the aluminacyclopentanes thus produced, into five-membered heterocycles, mono- and di-substituted cyclobutanes and cyclopropanes, has been demonstrated.
A new olefin synthesis: condensation of aldehyde tosylhydrazones with stabilized carbanions