The i.r. solution spectra of a series of 2-ketomethylquinolines have been studied.Tautomeric ratios have been determined by n.m.r. spectroscopy.With one exception the compounds were substantially or exclusively in the enaminone forms.The only compound carrying an α-methyl group (18) proved to be solely in the ketone form.
Greenhill, John V.,Loghmani-Khouzani, Hossein,Maitland, Derek J.