BIS-PHOSPHATE COMPOUND AND ASYMMETRIC REACTION USING THE SAME
申请人:Terada Masahiro
公开号:US20120330038A1
公开(公告)日:2012-12-27
A novel bis-phosphate compound is provided which can be applied to a wide range of reactive substrates and reactions as an asymmetric reaction catalyst and can realize an asymmetric reaction affording a high yield and a high enantiomeric excess. The bis-phosphate compound has a tetraaryl skeleton represented by General Formula (1). In an asymmetric reaction, an amidodiene and an unsaturated aldehyde compound are reacted with each other in the presence of the optically active bis-phosphate compound to give an optically active amidoaldehyde. The invention allows a reaction such as an asymmetric Diels-Alder reaction to proceed efficiently, which has been difficult with conventional mono-phosphate compounds. Thus, the invention enables an industrially feasible method for the production of optically active amidoaldehydes, optically active β-amino acid derivatives, optically active diamine compounds, optically active pyrrolidine derivatives and optically active dihydropyran derivatives which are useful as products such as medicines, agricultural chemicals and chemical products as well as synthesis intermediates for such products.
Cooperative Catalysis: Enantioselective Propargylic Alkylation of Propargylic Alcohols with Enecarbamates Using Ruthenium/Phosphoramide Hybrid Catalysts
The diastereo‐ and enantioselectivepropargylicalkylation of propargylicalcohols with E‐enecarbamates in the presence of a catalytic amount of thiolate‐bridged diruthenium complexes bearing an optically active phosphoramide moiety gives the corresponding propargylic alkylated products (up to 97 % ee).
Metal-Free Chiral Phosphoric Acid or Chiral Metal Phosphate as Active Catalyst in the Activation of N-Acyl Aldimines
作者:Masahiro Terada、Kyohei Kanomata
DOI:10.1055/s-0030-1260545
日期:2011.6
Whether metal-free chiral phosphoric acid or chiral metal phosphate functions as an active catalyst was confirmed in three reactions. In the aza-Friedel-Crafts and aza-ene-type reactions, a metal-free chiral phosphoric acid, namely, a chiral Brønsted acid, was verified to be the active catalyst. In contrast, the substitution reaction of α-diazoacetate with aldimine was accelerated by a salt-containing chiral phosphoric acid and hence chiral metal phosphate presumably functioned as an active catalyst.
Enantioselective Intermolecular Enamide–Aldehyde Cross-Coupling Catalyzed by Chiral <i>N</i>-Heterocyclic Carbenes
作者:Jicheng Wu、Changgui Zhao、Jian Wang
DOI:10.1021/jacs.5b13501
日期:2016.4.13
carbene (NHC)-catalyzed intermolecular cross-coupling of enamides and aldehydes is described. Upon exposure of enamides to aldehydes in the presence of a NHC catalyst, catalytic C-C bond formation occurs, providing highly enantioselective N-protected amines, bearing a quaternary carboncenter, in good yields and with high enantioselectivities.
描述了前所未有的 N-杂环卡宾 (NHC) 催化的烯酰胺和醛的分子间交叉偶联。在 NHC 催化剂存在下将烯酰胺暴露于醛后,会发生催化 CC 键的形成,提供高度对映选择性的 N 保护胺,带有季碳中心,收率高,对映选择性高。
Core-Structure-Oriented Asymmetric Organocatalytic Substitution of 3-Hydroxyoxindoles: Application in the Enantioselective Total Synthesis of (+)-Folicanthine
作者:Chang Guo、Jin Song、Jian-Zhou Huang、Peng-Hao Chen、Shi-Wei Luo、Liu-Zhu Gong
DOI:10.1002/anie.201107079
日期:2012.1.23
yield and excellent enantioselectivity. This reaction enabled the enantioselective construction of hexahydropyrroloindole skeletons and the first catalytic enantioselective total synthesis of (+)‐folicanthine.