2-(Benzylsulfanyl)-6-chloro-9-isopropylpurine, a Valuable Intermediate in the Synthesis of Diaminopurine Cyclin Dependent Kinase Inhibitors
作者:David Taddei、Alexandra M. Z. Slawin、J. Derek Woollins
DOI:10.1002/ejoc.200400748
日期:2005.3
was chosen to prepare the required 2-(benzylsulfanyl)hypoxanthine intermediate. Attempts to prepare its purin-6-yl methanesulfonic ester analogue failed. Conversion to the 6-chloropurine derivative enabled the introduction of arylamines in the presence of catalytic amounts of acid. Further chemical variety was introduced on the purine through a regioselective Mitsunobu N-9 alkylation. Oxidative cleavage
描述了 2,6-二氨基嘌呤 CDK 抑制剂的新型前体 2-(benzylsulfanyl)-6-chloro-9-isopropylpurine 的合成潜力。选择 Traube 嘌呤合成来制备所需的 2-(苄基硫烷基) 次黄嘌呤中间体。尝试制备其嘌呤-6-基甲磺酸酯类似物失败。转化为 6-氯嘌呤衍生物能够在催化量的酸存在下引入芳胺。通过区域选择性的 Mitsunobu N-9 烷基化,在嘌呤上引入了更多的化学变化。2-(苄基硫烷基)离去基团与脂族胺的氧化裂解如先前报道的那样实施。Purvalanol A 是一种有效的 CDK 抑制剂,使用这种方法合成。模板和中间体通过现代光谱技术和单晶 X 射线衍射进行了充分表征。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)