Optically active &agr;-aminonitrile and process for producing &agr;-amino acid
申请人:Japan Science and Technology Corporation
公开号:US06339159B1
公开(公告)日:2002-01-15
An aldehyde compound is reacted with an amino compound and hydrogen cyanate in the presence of a chiral zirconium catalyst obtained by mixing a zirconium alkoxide with an optically active binaphthol compound.
Catalytic Asymmetric Strecker Synthesis. Preparation of Enantiomerically Pure α-Amino Acid Derivatives from Aldimines and Tributyltin Cyanide or Achiral Aldehydes, Amines, and Hydrogen Cyanide Using a Chiral Zirconium Catalyst
Strecker amino acid synthesis starting from achiral aldehydes, amines, and HCN using a chiral zirconium catalyst has also been achieved. The three-component asymmetric process reported here significantly improves upon the original Strecker reaction, and has advantages over previous reactions using unstable imines (Schiffbases) as starting materials. Moreover, high yields and enantioselectivities have
Strecker reactions of aldimines with Bu3 SnCN in the presence of the novelchiralzirconium binuclear catalyst 1 provide α-aminonitriles in good yields and with high enantioselectivities. The reaction can be applied to a wide range of substrates. Since both enantiomers of the chiral sources are readily avaibable, both enantiomers of the α-aminonitriles are easily prepared according to this method.