A detailed account is given of the preferential alkylation at the 7-position of 3-alkyladenines (1-3), which has been effected with MeI, EtI, and PhCH2Br in AcNMe2 or acetone to prepare the corresponding 3, 7-dialkyladenine salts (4a-i). In the cases of benzylation of 3-methyladenine (1) and 3-ethyladenine (2) and methylation of 3-benzyladenine (3), the 9-position has been found to be another, but much less favored site of alkylation.
详细报道了3-烷基
腺嘌呤在7位上的选择性烷基化反应(1-3),使用MeI、EtI和PhCH2Br在AcNMe2或
丙酮中制备相应的3,7-二烷基
腺嘌呤盐(4a-i)。对于3-甲基
腺嘌呤(1)和
3-乙基腺嘌呤(2)的苄基化反应以及
3-苄基腺嘌呤(3)的甲基化反应,发现9位是另一个烷基化位置,但选择性明显较低。