Iridium-Catalyzed Asymmetric Hydrogenation of 3,3-Disubstituted Allylic Alcohols in Ethereal Solvents
作者:Maurizio Bernasconi、Vincenzo Ramella、Paolo Tosatti、Andreas Pfaltz
DOI:10.1002/chem.201303915
日期:2014.2.24
Ir‐phosphinomethyl‐oxazoline complexes have been identified as efficient, highly enantioselective catalysts for the asymmetric hydrogenation of 3,3‐disubstituted allylic alcohols and related homoallylic alcohols. In contrast to other N,P ligand complexes, which require weakly coordinating solvents, such as dichloromethane, these catalysts perform well in more ecofriendly THF or 2‐MeTHF. Their synthetic
Ir-膦基甲基-恶唑啉络合物已被认为是高效的,高对映选择性的催化剂,可用于3,3-二取代的烯丙醇和相关的均烯丙醇的不对称加氢反应。与其他需要弱配位溶剂(例如二氯甲烷)的N,P配体配合物相比,这些催化剂在更环保的THF或2-MeTHF中表现良好。它们的合成潜力已通过四种比沙泊烷倍半萜的正式全合成得到证明。