2π + 4π Cycloadditions of carbocation activated allenes
作者:Paul G. Gassman、Andrew C. Lottes
DOI:10.1016/0040-4039(91)80196-d
日期:1991.11
Boron trifluoride etherate opening of an allenic acetal produced an allene which was strongly activated by the alpha-carbocation to undergo 2-pi + 4-pi cycloaddition reactions.