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 cycloalumina-tion of ethylene and other unsaturated compounds (acetylenes, olefins, and allenes) with EtAlCl2 in the presence of Cp2ZrCl2 as catalyst.