Jn. Junior et A. Kascheres, SITE SELECTIVITY IN THE REACTION OF 2-FORMYL-2H-AZIRINE-N-ARYLIMINES WITH DIPHENYLKETENE, Journal of heterocyclic chemistry, 34(1), 1997, pp. 341-343
2-Formyl-2H-azirine-N-arylimines lac react with diphenylketene 2 to af
ford 2H-2-azirinyl-2-azetidinones 3a-c and N-aryldiphenylacetamides 4a
-c by reaction at the exo-imine group. Derivatives containing the bulk
ier methyl group at the 2-position, 1d-f, produce only 4a-c.