78893-31-9Relevant academic research and scientific papers
SYNTHESIS OF 3-SUBSTITUTED-5-OXO-5H-BENZOPYRANOPYRIDINE DERIVATIVES
Ishiguro, Toshihiro,Ukawa, Kiyoshi,Sugihara, Hirosada,Nohara, Akira
, p. 733 - 740 (2007/10/02)
3-Cyano-. 3-alkoxycarbonyl-, and 3-formyl-5-oxo-5H-benzopyranopyridine dervatives were prepared by reactions of 2-amino-4-oxo-4H-1-benzopyran-3-carboxaldehydes 1 with acetylene derivatives (methods A-C) or with reactive methylene compounds (methods D-E) and also by catalytic hydrogenation of 2-chloro-5-oxo-5H-benzopyranopyridine-3-carbonitriles 12 (method F).
