TaCl5-catalyzed reaction of 1-alkenes with n-alkyl Grignard reagents

Tantalum-catalyzed reaction of organomagnesium compounds (OMCs), bearing normal alkyl radicals, with 1-alkenes to afford novel iso-alkylmagnesiums has been systematically studied for the first time. The probable mechanism of the reaction implying the intermediate formation of β,β′-dialkyl substituted tantalacyclopentanes is discussed.