Joint cycloalumination of ethylene and other unsaturated compounds with EtAlCl2 in the presence of Cp2ZrCl2. Synthesis of aluminacarbocycles
摘要:
A procedure has been developed for the selective synthesis of five-membered aluminum-containing heterocycles, 2,3-dialkyl-1-ethylaluminacyclopent-2-enes, 3-alkyl-1-ethylaluminacyclopentanes, 2-alkylidene-1-ethylaluminacyclopentanes, and 3-alkyl-1-ethyl-2-methylidenealuminacyclopentanes, via joint cycloalumination of ethylene and other unsaturated compounds (acetylenes, olefins, and allenes) with EtAlCl2 in the presence of Cp2ZrCl2 as catalyst.
‘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:U. M. Dzhemilev、A. G. Ibragimov、I. R. Ramazanov、M. P. Luk'yanova、A. Z. Sharipova、L. M. Khalilov
DOI:10.1007/bf02494899
日期:2000.6
A regioselective method for the synthesis of 1,1 -dialkylcyclopropanes was developed. The method is based on the reaction of 2,3-dialkyl-1-ethylalumacyclopent-2-enes with an excess of dialkyl sulfates (Me2SO4 or Et2SO4). A plausible reaction mechanism was suggested.