Cyclic organophosphorus compounds. Part XII. Use of 2-benzoyloxy-5,5-dimethyl-2-oxo-1,3,2-dioxaphosphorinan under steric control in acylations

Abstract

The synthesis and benzoylating activity of 2-benzoyloxy-5,5-dimethyl-2-oxo-1,3,2-dioxaphosphorinan are described. The compound reacts selectively with the less hindered amino-group of 1,4-diamino-2,6-dibromo-benzene to give 4′-amino-3′,5′-dibromobenzanilide; benzoyl chloride attacks both amino-groups.