Cycloaddition of t-butylcyanoketen to racemic and optically active 1,3-diphenylallene
Abstract
X-Ray studies show the major adduct from t-butylcyanoketen and racemic 1,3-diphenylallene to be (1), and the only other adduct is shown to have structure (2); use of optically active allene shows that both are formed to some extent via a chiral transition state.