Method of enantioselective nucleophilic addition reaction of enamide to carbonyl group and synthesis method of optically active alpha-hydroxy-y-keto acid ester and hydroxydiketone
申请人:Kobayashi Shu
公开号:US20070073087A1
公开(公告)日:2007-03-29
A method of an enantioselective nucleophilic addition reaction to carbonyl, which enables an asymmetric synthesis of an optically active α-hydroxy-γ-keto acid ester, an optically active α-hydroxy-γ-amino acid ester, hydroxydiketone compounds, etc. being useful as a raw material or synthesis intermediate for producing a pharmaceutical preparation, an agricultural chemical, a fragrance, a functional polymer or the like. In this method, the nucleophilic addition reaction of enamide compound accompanied by hydroxyl (—OH) formation to carbonyl is carried out in the presence of a chiral catalyst with copper or nickel.
Catalytic asymmetric addition reactions of enecarbamates with ethyl glyoxylate have been developed using CuClO4·4CH3CN and a diimine ligand as the catalyst. Highlydiastereo- and enantioselective addition reactions of α-mono-substituted enecarbamates have been also achieved. These reactions afforded the corresponding adducts with high selectivity; that is, syn adducts from Z-enecarbamates and anti
Highly Diastereo- and Enantioselective Reactions of Enecarbamates with Ethyl Glyoxylate To Give Optically Activesyn andantiα-Alkyl-β-Hydroxy Imines and Ketones