Lewis acid-catalyzed reactions of .alpha.,.beta.-unsaturated N,N-dimethylhydrazones with 1,4-benzoquinone. Formation of indoles by a novel oxidative rearrangement
Lewis acid-catalyzed reactions of .alpha.,.beta.-unsaturated N,N-dimethylhydrazones with 1,4-benzoquinone. Formation of indoles by a novel oxidative rearrangement