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.
描述了在C(5)处带有氯,溴或甲基取代基的7-deaza-2'-deoxy-腺嘌呤衍生物7b-3的合成。5-取代的4-氯吡咯并[2,3- d ]嘧啶4b-d与2-脱氧-3,5-二-O-(4-甲苯甲酰基)-α-D-赤型-戊呋喃糖酰氯的糖基化作用(3)仅给出了β-D-核苷5b–d。将它们解封(6b–d)并转化为结核菌素衍生物7b–d。