Simple Synthetic Route to “Oxa-Deaza-Flavins” (2H-[1]-Benzopyrano[2,3-d]pyrimidine-2,4(3H)-diones)

Abstract

e d u c t i o n o f s u b s t i t u t e d [I]-benzopyrano ~, 3 -~p y r i m i d i n e -2 , 4 ( 3 ~) -d i o n e s , "oxa-deaza-flavlns", (11).a r e described.