合成了空气/水分稳定,晶体和可储存的手性水杨基恶唑啉基氧化(V)配合物,并公开了其在氢化硅烷作为氢化物源的情况下催化不对称还原酮亚胺的催化应用。获得了广泛的底物范围,高收率和出色的对映选择性(最高99%)。此外,对映体纯α-氨基酯,γ-和δ-内酰胺以及异吲哚啉酮的合成也已使用该方法进行。最后,该方法已应用于具有药物相关性的合成靶标,例如R -(+)-沙丁胺碱和R -(+)-crispine A.
合成了空气/水分稳定,晶体和可储存的手性水杨基恶唑啉基氧化(V)配合物,并公开了其在氢化硅烷作为氢化物源的情况下催化不对称还原酮亚胺的催化应用。获得了广泛的底物范围,高收率和出色的对映选择性(最高99%)。此外,对映体纯α-氨基酯,γ-和δ-内酰胺以及异吲哚啉酮的合成也已使用该方法进行。最后,该方法已应用于具有药物相关性的合成靶标,例如R -(+)-沙丁胺碱和R -(+)-crispine A.
Enantioselective Reduction of Ketones and Imines Catalyzed by (CN-Box)ReV-Oxo Complexes
作者:Kristine A. Nolin、Richard W. Ahn、Yusuke Kobayashi、Joshua J. Kennedy-Smith、F. Dean Toste
DOI:10.1002/chem.201001164
日期:2010.8.16
application of chiral, non‐racemic ReV–oxo complexes to the enantioselectivereduction of prochiral ketones is described. In addition to the enantioselectivereduction of prochiral ketones, we report the application of these complexes to 1) a tandem Meyer–Schuster rearrangement/reduction to access enantioenriched allylic alcohols and 2) the enantioselectivereduction of imines.
描述了手性非外消旋 Re V - oxo 配合物在前手性酮的对映选择性还原中的开发和应用。除了前手性酮的对映选择性还原外,我们还报告了这些复合物在以下方面的应用:1)串联 Meyer-Schuster 重排/还原以获取对映体富集的烯丙醇和 2)亚胺的对映选择性还原。
Enantioselective synthesis of α,α-disubstituted α-amino acids via direct catalytic asymmetric addition of acetonitrile to α-iminoesters
作者:Shaoquan Lin、Naoya Kumagai、Masakatsu Shibasaki
DOI:10.1039/c6ob01874b
日期:——
α,α-Disubstituted α-amino acids have attracted increasing interest due to their potential utility as building blocks of unnatural peptides. Herein we document an enantioselective entry to this class of compounds through the direct catalytic addition of acetonitrile to α-iminoesters bearing an N-thiophosphinoyl group. Chiral N-heterocyclic carbene complexes of [Ir(cod)(OMe)]2 catalytically rendered