Solvent-free regioselective synthesis of 6-and 7-substituted pteridines under microwave irradiation
摘要:
Reactions of 5,6-diaminouracils with a-keto aldehydes over acidic and neutral aluminum oxide under microwave irradiation gave the corresponding 6- and 7-substituted 1,2,3,4-tetrahydropteridine-2,4-diones in 63-79% yield with high regioselectivity.