Synthesis and structure of anils of 2-formyl-3-hydroxybenzofuran

A number of anils of 2-formyl-3-hydroxybenzofuran (I) and their derivatives, which are models of the individual tautomeric forms II and III, were synthesized. A ketoamine structure (Ic) was assigned to compounds I as a result of a study of the electronic, vibrational, and PMR spectra.Communication XIV from the series Benzenoid-Quinoid Tautomerism of Azomethines and Their Structural Analogs; see [1] for communication XIII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 154–157, February, 1973.