Studies of the elimination of 4-aryl-3-methyl-4-piperidinols—I The conformation of epimeric 1-alkyl (and aralkyl)-4-aryl-5-methyl-1,2,5-6-tetrahydropyridine hydrochlorides

A detailed study of the products of elimination of some 4-aryl-3-methyl-4-piperidinols has been made and the PMR spectra of derived 1-alkyl (and aralkyl)-4-aryl-5-methyl-1,2,5,6-tetrahydropyridines and the corresponding hydrochloric salts reported and discussed. The 5-methyltetrahydropyridine hydrochlorides are shown to exist in epimeric forms in deuterochloroform and their PMR spectra have been interperted in terms of probable conformations.