N1,N3-disubstituted uracils as nonnucleoside inhibitors of HIV-1 reverse transcriptase
摘要:
A series of phenyloxyethyl and cinnamyl derivatives of substituted uracils were synthesized and found to exhibit potent activity against HIV-RT and HIV replication in cell culture. In general, the cinnamyl derivatives proved superior to the phenyloxyethyl derivatives, however 1-[2-(4-methylphenoxy)ethyl]3-(3,5-dimethylbenzyl)uracil (19) exhibited the highest activity (EC50 = 0.27 mu M) thus confirming that the 3-benzyluracil fragment in the NNRTI structure can be regarded as a functional analogue of the benzophenone pharmacophore typically found in NNRTIs. (C) 2012 Elsevier Ltd. All rights reserved.
使用P 2 O 5 / KI用醇对嘌呤,嘧啶和唑衍生物进行一锅N-烷基化的无三苯膦的方法:一种简便且选择性的途径,可获取碳环核苷
摘要:
描述了一种使用P 2 O 5和KI的混合物通过醇通过一锅法对核碱基和其他相关N-杂环进行N-烷基化的简便,选择性和温和的合成方法。使用P 2 O 5 / KI和Et 3 N / K 2 CO 3的碱性混合物,使结构不同的嘌呤,嘧啶和/或唑与伯醇反应在回流中,DMF以良好至合理的产率得到相应的N-烷基衍生物(碳环核苷)。评估了包括溶剂,碱,温度和底物/试剂比率的不同参数对反应进程的影响。仲和叔醇不能与核碱基反应。当前方案的主要优点是形成水溶性副产物,其中提供了简单的后处理和纯化过程。
Chitosan–silica sulfate nanohybrid: a highly efficient and green heterogeneous nanocatalyst for the regioselective synthesis of N-alkyl purine, pyrimidine and related N-heterocycles via presilylated method
pyrimidine nucleobases as well as other related N-heterocycles with HMDS utilizing chitosan–silica sulfate nanohybrid (CSSNH) is described. CSSNH is proved to be a useful, highly efficient and eco-friendly heterogeneous nanohybrid catalyst for silylation of nucleobases. The presilylated nucleobases then underwent the reaction with different sources of carbon electrophiles to afford the desired N-alkyl-substituted