Cycladdition of 1,2,3-benzotriazines to diphenylcyclopropenone
Abstract
With diphenylcyclopropenone, 1,2,3-benzotriazines give cycloadducts (3), (4), and (5); this last product requires rearrangement of a [2 + 3] cycloadduct resulting from addition of the triazine to the 2,3-bond of diphenylcyclopropenone, and conversion of the triazine into a diazine.