Carbon‐13 n.m.r. investigation of 2‐arylaminothiazolines and analogous thiazines, thiazepines and their amides

Abstract

Abstract The 13 C n.m.r. spectra of 2‐arylaminothiazoline, ‐thiazine and ‐thiazepine derivatives, and also those of some N ‐substituted isomeric pairs were recorded and assigned. The structure of the individual isomers, which as a result of contradictory spectroscopic data had earlier been ambiguous, was established. In addition, the tautomeric structure of some N ‐unsubstituted compounds was determined.