Tomisawa and his collaborators 1) examined the reactivity of l-Methyl-2(lH)-thiopyridone (I) and its benzene-fused homologs in comparison with that of their oxygen derivatives. As a part of their studies,nuclear magnetic resonance (NMR) spectra of these thiones were analysed in relation to their reactivity. Stewart and Siddall 3) already reported the NMR spectrum of I,but no studies seem to have been made on the NMR spectra of benzene-fused homologs of I and their portonated derivatives.
