作者:Sadagopan Raghavan、Vaddela Sudheer Babu
DOI:10.1016/j.tet.2011.01.064
日期:2011.3
steps in the enantioselective synthesis of Tamiflu include an asymmetric Diels–Alder reaction, Mitsunobu inversion using Fukuyama modified Weinreb reagent, carbamate directed epoxidation. Epoxide opening with trimethylsilyl azide furnished a 3:1 mixture of regioisomers that converged to afford the same aziridine. Attempted preparation of the unsaturated ester regioselectively using 2-iodoxybenzoic acid
Tamiflu对映选择性合成的关键步骤包括不对称Diels-Alder反应,使用Fukuyama改良的Weinreb试剂进行的Mitsunobu转化,氨基甲酸酯定向的环氧化。用三甲基甲硅烷基叠氮化物的环氧化物开口提供了区域异构体的3:1混合物,其会聚以提供相同的氮丙啶。尝试按照Nicolaou的方案使用2-碘氧基苯甲酸(IBX)区域选择性地制备不饱和酯。该不饱和酯是通过苯硒基化,然后亚硒酸酯消除而制备的。