作者:Naomi S. Rajapaksa、Meredeth A. McGowan、Matthew Rienzo、Eric N. Jacobsen
DOI:10.1021/ol400046n
日期:2013.2.1
A catalytic, enantioselective synthesis of (+)-reserpine is reported. The route features a highly diastereoselective, chiral catalyst-controlled formal aza-Diels–Alder reaction between a 6-methoxytryptamine-derived dihydro-β-carboline and an enantioenriched α-substituted enone to form a key tetracyclic intermediate. This approach addresses the challenge of setting the C3 stereogenic center by using
报道了 (+)-利血平的催化、对映选择性合成。该路线的特点是在 6-甲氧基色胺衍生的二氢-β-咔啉与富含对映体的 α-取代烯酮之间进行高度非对映选择性、手性催化剂控制的正式 aza-Diels-Alder 反应,以形成关键的四环中间体。这种方法通过使用催化剂控制解决了设置 C3 立体中心的挑战。四环到 (+)-利血平的制备包括分子内羟醛环化和空间位阻烯酸酯的高度非对映选择性氢化。