SYNTHESIS AND BIOLOGICAL EVALUATION OF SOME ACYCLIC<font>α</font>-(1<i>H</i>-PYRAZOLO[3,4-d]PYRIMIDIN-4-YL)THIOALKYLAMIDE NUCLEOSIDES
作者:O. Moukha-chafiq、M. L. Taha、H. B. Lazrek、J. J. Vasseur、E. De Clercq
DOI:10.1081/ncn-120003180
日期:2002.4.15
The chemical synthesis of some acyclic alpha-(1H-pyrazolo[3,4-d]pyrimidin-4-yl)thioalkylamide nucleosides (10-12)a-c is described. The treatment of 1H-pyrazolo[3,4-d]pyrimidin-4-thione 1 with compounds 2a-c gave, regioselectively, ethyl alpha-(1H-pyrazolo[3,4-d]pyrimidin-4-yl)thioalkylates 3a-c, respectively. These heterocycles were alkylated, separately, with alkylating agents 4, 5 and 6 to give, regioselectively, the N-1-acyclic nucleosides (7-9)a-c which were deprotected to afford the desired products (10-12)a-c. All synthetic compounds were characterized on the basis of their physical and spectroscopic properties. The products (10-12)a-c were evaluated for their inhibitory effects against the replication of HIV-1 (IIIB), HIV-2 (ROD), various DNA viruses, a variety of tumor-cell lines and M. tuberculosis. No marked biological activity was found.