Fine‐tuning the sites: The readily accessible N‐phosphinyl phosphoramide 1 proved to be highly efficient and enantioselective in catalyzing the title reaction. The synthetic utility of this methodology was demonstrated with the first catalytic asymmetric synthesis of the analgesic pharmaceutical (R)‐chlorothenoxazine (see scheme).
位点的微调:容易获得的N-次膦酰基
磷酰胺1在催化标题反应中被证明是高效且对映选择性的。止痛药(R)-
氯代
噻嗪的首次催化不对称合成证明了该方法的合成效用(参见方案)。