Synthesis of new potential aminopeptidase inhibitors by Lewis acid induced rearrangement of 2,3-epoxy amines and regiospecific nucleophilic trapping of aziridinium ion intermediates with α-amino esters
作者:Quanying Liu、Allan P Marchington、Christopher M Rayner
DOI:10.1016/s0040-4020(97)00849-1
日期:1997.11
Sharpless asymmetric epoxidation, are readily converted into 2,3-epoxy amines which, upon treatment with TMSOTf, undergo stereospecific rearrangement to the corresponding 3-trimethylsilyloxy-1,2-aziridinium triflates. These electrophilic species undergo efficient regiospecific nucleophilic ring opening at C-1 using α-amino esters with full control of absolute and relative stereochemistry. The products are
使用Sharpless不对称环氧化反应制备的旋光的2,3-环氧醇很容易转化为2,3-环氧胺,经TMSOTf处理后,立体定向重排为相应的3-三甲基甲硅烷氧基-1,2-叠氮基三氟甲磺酸酯。这些亲电子物质使用α-氨基酯在C-1处进行有效的区域特异性亲核开环,并完全控制绝对和相对立体化学。该产品在结构上与已知的有效氨基肽酶抑制剂Bestatin和其他生物活性分子有关。