K. Matsumoto et al., REACTION OF 3-AROYLAZIRIDINES WITH DIPHENYLCYCLOPROPENONE - 1,3-DIPOLE CASCADE FROM AZOMETHINE YLIDE TO CARBONYL YLIDE, Tetrahedron letters, 36(17), 1995, pp. 3011-3014
The novel formation of anhydro-3-hydroxy-2,4-diphenyl-6-arylpyrylium h
ydroxide in the reaction of 3-aroylaziridines with diphenylcyclopropen
ones and their 1,3-dipolar cycloaddition reactions with diphenylcyclop
ropenone, N-phenylmaleimide, dimethyl fumarate, and dimethyl maleate w
ere described.