CONJUGATED HETEROCUMULENES. SYNTHESIS OF C=C-CONJUGATED CARBODIIMIDES BY A WITTIG-TYPE REACTION OF IMINOPHOSPHORANES WITH ISOCYANATES AND THEIR CYCLOADDITIONS

Abstract
A Wittig-type reaction of N-(1,2-diarylethenyl)iminophosphoranes with isocyanates gave C=C-conjugated carbodiimides, which were utilized in the synthesis of heterocycles.