Condensation of phosphonate anions with 4-amino-5-nitrosopyrimidines: a new pteridine synthesis
Abstract
The condensation of diethyl phosphonate carbanions, prepared from α-bromo-esters, -nitriles, or -ketones, with 4,6-diamino-5-nitrosopyrimidines constitutes a versatile and unequivocal route to pteridin-7(8H)-ones, 7-aminopteridines, and 7-alkyl- or aryl-pteridines.