A detailed account is given of the general synthetic route to 7, 9-dialkyladeninium salts (16-18) from N6-alkoxy-9-alkyladenines (type 5 or 11-13), readily obtainable from 9-alkyladenines in three steps involving N(1)-oxidation, O-alkylation, and Dimroth rearrangement. Alkylations of N6-methoxy-9-methyladenine (5) and 9-alkyl-N6-benzyloxy-adenines (11-13) with MeI, EtI, and PhCH2Br in AcNMe2 produced the corresponding 7-alkylated derivatives (15 and 19-21), together with small amounts of the N6-alkylated isomers (6, 8, and 9). Catalytic hydrogenolysis of the former compounds with hydrogen and Raney Ni yielded 7, 9-dialkyladeninium salts (16-18).
本文详细介绍了从 N6-烷氧基-9-烷基
腺嘌呤(类型 5 或 11-13)合成 7,9-二烷基
腺嘌呤盐(16-18)的一般合成路线,这些
腺嘌呤可通过 N(1)-氧化、O-烷基化和 Dimroth 重排三个步骤从 9-烷基
腺嘌呤中轻易获得。在 AcNMe2 中用 MeI、EtI 和 PhCH2Br 对 N6-甲氧基-
9-甲基腺嘌呤(5)和 9-烷基-N6-苄氧基-
腺嘌呤(11-13)进行烷基化反应,可得到相应的 7-烷基化衍
生物(15 和 19-21)以及少量 N6-烷基化异构体(6、8 和 9)。用
氢气和 Raney Ni 催化前一种化合物的氢解,可得到 7、9-二烷基
钆盐(16-18)。