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Communication | Regular issue | Vol 32, No. 9, 1991, pp.1681-1685
Published online, 1st January, 1970
DOI: 10.3987/COM-91-5768
Reaction of 7-Substituted 4-Hydroxy-1,4-benzoxazine-3-ones in Strongly Acidic Media

Andrés Quiroz and Hermann M. Niemeyer*

*Departamento de Química, Facultad de Ciencias, Unversidad de Chile, Casilla 653, Santiago, Chile

Abstract

Kinetic and product studies of the reaction of 7-substituted 4-hydroxy-1,4-benzoxazin-3-ones in strongly acidic media produced biphasic Hammett plots which indicated the intermediacy of a highly electrophilic nitrogen compound with nitrenium ion character.