The synthesis of the 7-deaza-2'-deoxyinosine derivatives 3a-c with chloro, bromo, and iodo substituents at position 7 is described. Glycosylation of the 7-halogenated 6-chloro-7-deazapurines 4a-c or of the 7-halogenated 6-chloro-7-deaza-2-(methylthio)purines 9a-c with 2-deoxy-3,5-di-O-(4-toluoyl)-alpha-D-erythro-pento-furanosyl chloride (5) furnished the intermediates 7a-c and 11a-c, respectively, which gave, upon deprotection, the desired nucleosides 3a-c.
The synthesis of the 7-deaza-2'-deoxyinosine derivatives 3a-c with chloro, bromo, and iodo substituents at position 7 is described. Glycosylation of the 7-halogenated 6-chloro-7-deazapurines 4a-c or of the 7-halogenated 6-chloro-7-deaza-2-(methylthio)purines 9a-c with 2-deoxy-3,5-di-O-(4-toluoyl)-alpha-D-erythro-pento-furanosyl chloride (5) furnished the intermediates 7a-c and 11a-c, respectively, which gave, upon deprotection, the desired nucleosides 3a-c.
The synthesis of the 7-deaza-2'-deoxyinosine derivatives 3a-c with chloro, bromo, and iodo substituents at position 7 is described. Glycosylation of the 7-halogenated 6-chloro-7-deazapurines 4a-c or of the 7-halogenated 6-chloro-7-deaza-2-(methylthio)purines 9a-c with 2-deoxy-3,5-di-O-(4-toluoyl)-alpha-D-erythro-pento-furanosyl chloride (5) furnished the intermediates 7a-c and 11a-c, respectively, which gave, upon deprotection, the desired nucleosides 3a-c.