Ring–chain tautomerism of some o-benzoylbenzanilides
Abstract
Interconversions of ring–chain tautomers of o-benzoylbenzanilide are described, but one of the three structures is observed only in solution. N-o-Biphenylylphthalimidines have been prepared, some of them by reduction of ring–chain tautomers of o-benzamidobiphenyl derivatives. Structural assignments are based mainly on i.r. spectroscopic evidence.