P. Tullio, R. Ouedraogo, L. Dupont
Apr 23, 1999
Citations
0
Influential Citations
8
Citations
Journal
Tetrahedron
Abstract
Abstract 3-Alkylamino-pyrido[4,3-e]-1,2,4-thiadiazine 1,1-dioxide represents a new class of heterocyclic compounds expressing important pharmacological properties. According to the position of the CN double bond in the thiadiazine ring, this heterocyclic ring system may exist under three different tautomeric forms. By means of spectral and X-ray data collected from selected compounds, the most favourable tautomeric form adopted by 3-alkylamino-pyrido[4,3-e]-1,2,4-thiadiazine 1,1-dioxides devoid of an alkyl substituent in the 2- or in the 4-position was determined. The present study giving new insights in the geometrical and conformational aspects of pyridothiadiazinedioxides is important considering the pharmacological potentialities of this class of heterocyclic compounds.