Comportement particulier d'arylidènebenzothiazinonedioxydes dans les cycloadditions [3 + 2]. Compétition entre sites dipolarophiliques. Évolution des cycloadduits

Abstract

The reaction of diphenylnitrilimine with some arylidenebenzothiazinone dioxides leads to a mixture of two products that were isolated by chromatography. Spectroscopic data (infrared, nuclear magnetic resonance) and a radiocrystallographic study illustrate a competition between the two dipolarophilic sites in dipolar cycloaddition.