[2 + 2]-Cycloaddition of a stabilised vinyl cation with cyclopentadiene; X-ray crystal structure of the 2 : 1 addition product
Abstract
Lewis acid-catalysed reaction of 1,1-dimethyl-3-phenylprop-2-ynyl chloride with cyclopentadiene yields a 2 : 1 addition product via[2 + 2]-cycloaddition of an intermediate allenyl cation.