Practical synthesis of potent sphingosine-1-phosphate lyase inhibitors THI and LX2931
作者:Haiming Zhang、Jie Yan、Mark S. Bednarz、Gonzalo Hernandez、Yuelie Lu、Lawrence F. Courtney、Jason Chen、Weifeng Hu、Renmao Liu、Xiaogen Yang、Wenxue Wu
DOI:10.1016/j.tet.2013.03.071
日期:2013.5
A practical and scalable synthesis of in vivo sphingosine-1-phosphate lyase inhibitor LX2931 (1) is described. The synthetic route features an improved Büchi cyclocondensation of 2-ethoxyacrylonitrile (3) with either 1-amino-1-deoxy-d-fructose acetate (4a) or d-(+)-glucosamine hydrochloride (4b) to produce 1-(4-((1R,2S,3R)-1,2,3,4-tetrahydroxybutyl)-1H-imidazol-2-yl)ethanone (2, THI), followed by oximation
描述了一种实用且可扩展的体内鞘氨醇-1-磷酸裂解酶抑制剂LX2931(1)的合成方法。合成路线设有2乙氧基丙烯腈(的改进的步琪环缩合3与任一的1-氨基-1-脱氧- )d -fructose乙酸乙酯(图4a)或d - (+) -葡糖胺盐酸盐(图4b),以产生1-(4- -(((1 R,2 S,3 R)-1,2,3,4-四羟基丁基)-1 H-咪唑-2-基)乙酮(2,THI),然后进行THI的肟化和酸促进的肟异构化得到LX2931(1)。