Synthesis of 4,10‐dihydro‐4,10‐dioxo‐1H‐[1]‐benzopyrano[3,2‐b]pyridine, 4,5‐Dihydro‐4,5‐dioxo‐1H‐[1]‐benzopyrano[2,3–6]pyridine and 1,5‐Dihydro‐1,5‐dioxo‐4H‐[1]‐benzopyrano[3,4‐b]pyridine derivatives from aminobenzopyrones

Abstract
No abstract available