Synthesis and antiviral activity of 4,6-disubstituted pyrimido[4,5-b]indole ribonucleosides
作者:Michal Tichý、Radek Pohl、Hao Ying Xu、Yen-Liang Chen、Fumiaki Yokokawa、Pei-Yong Shi、Michal Hocek
DOI:10.1016/j.bmc.2012.08.021
日期:2012.10
A series of new pyrimido[4,5-b]indole ribonucleosides bearing phenyl or hetaryl group at position 4 has been prepared by selective Pd-catalyzed cross-coupling reactions of the corresponding protected 4,6-dichloropyrimido[4,5-b]indole ribonucleoside with (het)arylboronic acids or stannanes followed by deprotection. Further cross-couplings under harsher conditions and employing X-Phos ligand proceeded
通过相应保护的4,6-二氯嘧啶基[4,5- b ]的选择性Pd催化交叉偶联反应,制备了一系列新的在位置4带有苯基或杂芳基的嘧啶并[4,5- b ]吲哚核糖核苷。吲哚核糖核苷与(杂)芳基硼酸或锡烷,然后脱保护。在更苛刻的条件下和使用X-Phos配体的进一步交叉偶联在位置6进行,得到4,6-二取代的嘧啶并[4,5- b ]吲哚核糖核苷。这些化合物中的某些显示出对登革热病毒的抗病毒活性。