Diphenyliodonium salts in t-butyl alchol have converted the anions of dimedone, dibenzoylmethane and tribenzoylmethane to C-phenyl, C, C-diphenyl, O-phenyl and O, C-diphenyl derivatives, the structures of which have been proved by degradation and synthesis. Reactions of dimedone in methanol or ethanol gave mainly products arising from dehydrogenation of the solvent.
Spectroscopic studies of tautomeric systems. Part I. Triacylmethanes
作者:D. C. Nonhebel
DOI:10.1039/j39680000676
日期:——
A study of the i.r., n.m.r., and u.v. spectra of diacylbenzoylmethanes and acyldibenzoylmethanes, in which only two of the three acyl groups are involved in the hydrogen-bonded chelate ring, has shown that the benzoyl group is not involved in the enolic system. The reason for this has been shown to be steric and not electronic.