A Novel Synthesis of Pyrimidoquinoline-2(3H),4(10H)-diones (5-Deazaflavins) and Analogues by the Oxidative Cyclization of 5,5'-Arylmethylenebis-(6-alkylamino-3-methyluracils)
The oxidative coupling of 5,5'-arylmethylenebis-(6-alkylamino-3-methyluracils), prepared by the condensation of 6-alkylamino-3-methyluracils and arenecarbaldehydes, with diethyl azodiformate afforded the corresponding pyrimidoquinoline-2(3H),4(10H)