Reaction des nitrones avec les chlorures d'acides: action de chlorures d'aryl-sulfonyles et du chlorure de benzoyle sur des n-oxy (aryl-1 dihydro-3,4 isoquinoleines). Formation d'une isoquinoleine,d'un isocarbostyryle ou d'une indoline selon les conditions

Toluene-p-sulphonyl chloride, p-nitrobenzoyl chloride, and benzoyl chloride react with 1-aryl 3,4-isoquinoline N-oxide depending on the acidity of the medium, the nature of the substituent at C-1, and the nature of the acid chloride, to give an isoquinoline, an isocarbostyril (resulting from migration of the phenyl substituent at C-1), an indoline (resulting from migration of the phenyl moiety incorporated in the heterocycle), or the formation of an O-acyl hydroxamic acid. The maximum selectivity is obtained in an heterogeneous medium and is governed by the intermediate formation of an hydroxylated pseudo-base.