Synthesis and Interconversion of Isomeric Pyrrolotriazolopyrimidines.

Abstract

Fused pyrimidine derivatives R 0515 Synthesis and Interconversion of Isomeric Pyrrolotriazolopyrimidines. -The title compounds (VI) and (VII) are prepared via different approaches. When the former are heated in formic acid, Dimroth rearrangement to the thermodynamically more stable isomers (VII) takes place. -(DESAI, N. D.; Heteroat. Chem. 18 (2007) 3, 265-273; Loyola Cent. Res. Dev., St. Xavier's Coll., Ahmedabad 380 009, India; Eng.) -H. Toeppel 34-155