PROCESS FOR PRODUCING 2-AMINO-4-HYDROXY-7,8-DIHYDRO-PTERIDINES

摘要

Novel pteridines of formula (I), wherein R is a lower alkyl group, optionally substituted with a hydroxy group and R1 and R2 are the same or different and each is a lower alkyl group having together at least 3 carbon atoms or R1 and R2, together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure, and their method of preparation.