Stereoselective Ketone Rearrangements with Hypervalent Iodine Reagents
作者:Florence Malmedy、Thomas Wirth
DOI:10.1002/chem.201603022
日期:2016.11.2
The first stereoselective version of an iodine(III)‐mediated rearrangement of arylketones in the presence of orthoesters is described. The reaction products, α‐arylated esters, are very useful intermediates in the synthesis of bioactive compounds such as ibuprofen. With chiral lactic acid‐based iodine(III) reagents product selectivities of up to 73 % ee have been achieved.
P-Stereogenic Ir-MaxPHOX: A Step toward Privileged Catalysts for Asymmetric Hydrogenation of Nonchelating Olefins
作者:Maria Biosca、Pol de la Cruz-Sánchez、Jorge Faiges、Jèssica Margalef、Ernest Salomó、Antoni Riera、Xavier Verdaguer、Joan Ferré、Feliu Maseras、Maria Besora、Oscar Pàmies、Montserrat Diéguez
DOI:10.1021/acscatal.2c05579
日期:2023.3.3
The Ir-MaxPHOX-type catalysts demonstrated high catalytic performance in the hydrogenation of a wide range of nonchelating olefins with different geometries, substitution patterns, and degrees of functionalization. These air-stable and readily available catalysts have been successfully applied in the asymmetrichydrogenation of di-, tri-, and tetrasubstitutedolefins (ee′s up to 99%). The combination
Ir-MaxPHOX 型催化剂在各种具有不同几何形状、取代模式和功能化程度的非螯合烯烃的加氢中表现出高催化性能。这些空气稳定且易于获得的催化剂已成功应用于二、三和四取代烯烃(ee 高达 99%)的不对称氢化。理论计算和氘标记实验相结合,揭示了导致反应中观察到的对映选择性的因素,从而使这些 Ir 催化剂的最合适底物合理化。