Cycloaddition reactions of [2,2](2,5)-furanophane. Novel 1:1 and 2:1 cycloadducts with benzyne
Abstract
Benzyne reacts with [2,2](2,5)-furanophane (1) to afford a non-internally cyclized 1:1 adduct (2) which on further reaction yields the first example, (3), of a 2:1 cycloadduct in this series.