Adenosine Kinase Inhibitors. 4. 6,8-Disubstituted Purine Nucleoside Derivatives. Synthesis, Conformation, and Enzyme Inhibition
作者:Brett C. Bookser、Michael C. Matelich、Kristin Ollis、Bheemarao G. Ugarkar
DOI:10.1021/jm048968j
日期:2005.5.1
6,8-Disubstituted purine nucleosides were synthesized and evaluated as adenosine kinase inhibitors (AKIs). A method was developed to selectively substitute arylamines for halogens at C6 and C8 which utilizes alkali salts of arylamino anions. Regioselectivity was found to be counterion dependent. Potassium and sodium salts add selectively to C6 of 6-chloro-8-iodo-9-(2,3,5-tris-O-tert-butyldimethyls
合成了6,8-二取代的嘌呤核苷,并作为腺苷激酶抑制剂(AKI)进行了评估。开发了一种方法,该方法利用芳基氨基阴离子的碱金属盐选择性取代芳基胺取代C6和C8处的卤素。发现区域选择性是抗衡离子依赖性的。钾盐和钠盐选择性地添加到6-氯-8-碘-9-(2,3,5-三-O-叔丁基二甲基甲硅烷基-β-d-呋喃呋喃糖基)uri(7a)的C6中,而锂盐添加到C6和C8职位。可以通过采用以下方法制备不同的6,8-双芳基-N,N'-二基嘌呤核苷,例如8-苯胺-N-基-6-吲哚啉-N-基-9-(β-d-呋喃呋喃糖基)嘌呤不同芳基氨基阴离子的钾盐和锂盐的逐步反应,然后由氟离子诱导的甲硅烷基化。通过C8锂化化学或钯交叉偶联反应来制备其他C8取代的化合物。这些化合物中有几种是有效的AKI(例如10b,AK IC(50)= 0.019 microM),并且比以前基于嘌呤的最佳AKI 5'-deoxy-5'-aminoadenosine(AK