Microwave promoted C6-alkylation of purines through SNAr-based reaction of 6-chloropurines with 3-alkyl-acetylacetone

Abstract

C6-Alkylated purine analogues were obtained in good to excellent isolated yields by S_NAr reaction of 6-chloropurine derivatives with 3-alkyl-acetylacetone. 3-Alkyl-acetylacetones were employed as alkylating agents and C6-alkylated purines were obtained highly selectively within short reaction time under microwave irradiation conditions. This work is complementary to the classical coupling reactions for the synthesis of C6-alkylated purine analogues.