1-(7(9)H-purin-6-yl)-1H-pyridin-4-one;N(Puryl-6-)pyridon-4 bzw. Puryl-6-(4-hydroxy-pyridinium)-betain;1-(Purin-6-yl)-4-pyridone;1-(7H-purin-6-yl)pyridin-4-one
Selective Preparations of Purine Nucleosides and Nucleotides: Reagents and Methods
申请人:Zhong Minghong
公开号:US20150376219A1
公开(公告)日:2015-12-31
A process of regiospecific synthesis of N-9 purine nucleoside analogs in either solution or solid phase synthesis is described. The introduction of the sugar moiety or its analogue on to a 6-heteroarylium purine or its mesomeric betaine so that formation of only the N-9 position regioisomers of the purine nucleoside analogs (either D or L enantiomers) is obtained. This regiospecific introduction of the sugar moiety allows the synthesis of purine nucleoside analogs in high yields without formation of the N-7-positional regioisomers, while the 6-heteroaryliums are leaving groups facilitated for nucleophilic displacement. Solid supported 6-heterarylium purine bases can be used for purine based library synthesis and synthesis of nucleotide monophosphates and polyphosphates. Processes for providing novel 6-heteroarylium purines and their corresponding mesomeric betaines for the regiospecific synthesis of N-9 purine nucleoside analogs and nucleotides are described.