A short synthesis of 4-substituted 1-(hydroxyalkyl)-1H-pyrazolo[3,4-d]pyrimidines
作者:Boulos Zacharie、Timothy P. Connolly、Rabindra Rej、Giorgio Attardo、Christopher L. Penney
DOI:10.1016/0040-4020(95)01060-2
日期:1996.2
A simple and practical procedure was developed for the preparation of 4-substituted-1-(hydroxyalkyl)-1H-pyrazolo[3,4-d]pyrimidines. This was achieved by reacting nucleobase 3a or 3b with cesium carbonate or DBU in the presence of various alkyl iodides at 0°C in DMF. This procedure appears to be of general utility, proceeds in reasonable yield, and is applicable to different alkyl chain lengths including
开发了一种简单而实用的方法来制备4-取代的-1-(羟烷基)-1H-吡唑并[3,4-d]嘧啶。这是通过使核碱基3a或3b与碳酸铯或DBU在0℃下于DMF中在各种烷基碘的存在下反应来实现的。该方法看来是通用的,以合理的产率进行,并且适用于不同的烷基链长,包括保护的和未保护的醇。这种方法的合成效用通过ST 689(一种有效的免疫刺激药)的轻松合成得到了证明。