C,O-Chelated BINOL/Gold(III) Complexes: Synthesis and Catalysis with Tunable Product Profiles
作者:Jian-Fang Cui、Hok-Ming Ko、Ka-Pan Shing、Jie-Ren Deng、Nathanael Chun-Him Lai、Man-Kin Wong
DOI:10.1002/anie.201612243
日期:2017.3.6
Unprecedented stable BINOL/gold(III) complexes, adopting a novel C,O‐chelation mode, were synthesized by a modular approach through combination of 1,1′‐binaphthalene‐2,2′‐diols (BINOLs) and cyclometalated gold(III) dichloride complexes [(C^N)AuCl2]. X‐ray crystallographic analysis revealed that the bidentate BINOL ligands tautomerized and bonded to the AuIII atom through C,O‐chelation to form a five‐membered
Gold(I)-Catalyzed Enantioselective Carboalkoxylation of Alkynes
作者:Weiwei Zi、F. Dean Toste
DOI:10.1021/ja407150h
日期:2013.8.28
A highly enantioselective carboalkoxylation of alkynes catalyzed by cationic (DTBM-MeO-Biphep)gold(I) complexes is reported. Various optically active β-alkoxyindanone derivatives were obtained in good yields with high enantioselectivities. Furthermore, this methodology was extended to the enantioselective synthesis of 3-methoxycyclopentenones. The reaction is proposed to proceed through an enantioselective
The synthesis and characterization of the chiral bifunctional NHC ligands based on the imidazo[1,5-a]pyridine (ImPy) scaffold are described. These ligands possess a fluxional biaryl axis and a chiral center. The configurational stability of the biaryl axis in their gold(I) complexes is investigated. The application of these axially chiral ImPy-based AuCl complexes in a series of gold catalysis is explored
描述了基于咪唑并[1,5- a ]吡啶(ImPy)支架的手性双官能NHC配体的合成和表征。这些配体具有通量的联芳基轴和手性中心。研究了联芳基轴在其金(I)配合物中的构型稳定性。探索了这些轴向手性基于ImPy的AuCl配合物在一系列金催化中的应用,并观察到了不同程度的不对称诱导。在大多数情况下,配体(a S,R)-L8-H的环己基指向反应位点,因此发挥不对称空间影响在不对称诱导中更有效。