CONJUGATED SCHIFF'S BASES-14; CYCLOADDITION OF HETEROCUMULENES TO SOME 1-OXA-4-AZABUTADIENES

Article abstract of DOI:10.1016/0040-4020(82)80251-2

1-Oxa-4-azabutadienes proved to be prone to react with some heterocumulenes after 1,3-cycloaddition patterns yielding various 5,5-disubstituted derivatives of 1,3-diaryl-hydanotoins as it was shown by the chemical and spectroscopic analysis.Relatively high yields, mild reaction conditions and a very weak effect of solvent polarity on the reaction rate suggested a synchroneous mechanism involving 1,2-migration of a substituent.