Abstract 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 EtAlCl 2 in the presence of ...
