Formation of 1,3-diazetidines via C–N dimerization of 4-cycloalkylidene-oxazol-5(4H)-ones in the solid state
Abstract
Various 4-cycloalklidene-oxazol-5(4H)-ones have been observed to photodimerize in the solid state via an uncommon C–N cycloaddition to give centrosymmetric 1,3-diazetidines in very high yields.