作者:Bing Zhou、Yuanchao Li
DOI:10.1016/j.tetlet.2011.11.073
日期:2012.2
A synthesis of Entecavir (BMS-200475) was achieved starting from 1,3-propanediol in 15 steps and 23.4% overall yield. A unique feature of the synthetic route is that the five-membered carbocyclic core is installed by an intramolecular nitrile oxide cycloaddition (INOC) reaction and the guanine moiety is introduced by a Mitsunobu reaction. The route is characteristic of low cost, high yield and easy
从1,3-丙二醇开始的15步合成恩替卡韦(BMS-200475)的合成产率为23.4%。合成路线的独特之处在于,五元碳环核心是通过分子内一氧化氮环加成(INOC)反应安装的,而鸟嘌呤部分是通过Mitsunobu反应引入的。该路线具有成本低,产量高,易于操作的特点。