high regio- and diastereoselectivity (>99:1), and excellent enantioselectivity (up to 99%ee). Symmetrical substitution patterns on the aromatic ring of the oxabenzonorbornadienes had no effect on the course of the reaction nor the enantioselectivity. The reaction produces an unusual stereochemical outcome for oxabicyclicringopenings since the trans rather than the cis product is formed. Very low catalyst
Chiral Bicyclic NHC/Rh Complexes and Their Application to Catalytic Asymmetric Ring-Opening Reaction of Oxabenzonorbornadienes with Amines
作者:Mizuki Seki、Kazuhiro Yoshida
DOI:10.1021/acs.joc.1c02836
日期:2022.3.4
[RhCl(3az)(CO)2] 5az, which was prepared by replacing the COD ligand of 4az with CO. The potential of novel complex 4az as a chiral catalyst was investigated in the Rh-catalyzed asymmetricring-openingreaction of oxabenzonorbornadienes with amines, and the corresponding products were afforded in good yields with good enantioselectivities (up to 81% ee).
合成了一种带有手性双环 NHC 配体 [RhCl( 3az )(cod)] 4az的铑配合物,并通过 X 射线衍射分析、高分辨率质谱和多核 NMR 光谱对其进行了充分表征。NHC 配体3az的电子和空间特性通过红外测量和 X 射线衍射分析对用 CO 代替4az的 COD 配体制备的二羰基配合物 [RhCl( 3az )(CO) 2 ] 5az进行了评价。小说复杂的4az作为手性催化剂,在Rh催化的氧代苯并降冰片二烯与胺的不对称开环反应中进行了研究,并以良好的收率和良好的对映选择性(高达81% ee)提供了相应的产物。
Novel compounds and a novel process for their preparation
申请人:Fagnou Keith
公开号:US20050014721A1
公开(公告)日:2005-01-20
The present invention is directed to a procedure for making an enantiomerically enriched compound containing a hydronaphthalene ring structure. The process involves reacting oxabenzonorbornadienes with nucleophiles using rhodium as a catalyst and in the presence of a phosphine ligand. The compounds synthesized may be used in pharmaceutical preparations for the treatment of a variety of diseases and conditions.
Compounds and a novel process for their preparation
申请人:Astrazeneca AB
公开号:US07420003B2
公开(公告)日:2008-09-02
The present invention is directed to a procedure for making an enantiomerically enriched compound containing a hydronaphthalene ring structure. The process involves reacting oxabenzonorbornadienes with nucleophiles using rhodium as a catalyst and in the presence of a phosphine ligand. The compounds synthesized may be used in pharmaceutical preparations for the treatment of a variety of diseases and conditions.
Novel hydronaphthalene compounds, prepared by a rhodium catalysed ring opening reaction in the presence of phosphine ligand
申请人:AstraZeneca AB
公开号:EP1498406A1
公开(公告)日:2005-01-19
The present invention is directed to a procedure for making an enantiomerically enriched compound containing a hydronaphthalene ring structure. The process involves reacting oxabenzonorbornadienes with nucleophiles using rhodium as a catalyst and in the presence of a phosphine ligand. The compounds synthesized may be used in pharmaceutical preparations for the treatment of a variety of diseases and conditions.