A catalyticenantioselectiveStreckerreaction catalyzed by novel chiral lanthanum(III)−binaphthyl disulfonate complexes was developed. The key to promoting the reactions was a semistoichiometric amount of AcOH or i-PrCO2H, which takes advantage of HCN generation in situ. The corresponding cyanation products were obtained in high yields and with high enantioselectivities.
Described herein are compounds of formula (I), related compositions, and their use, for example in the formation of α-amino acids or a precursor thereof such as an α-aminonitrile.
Scaleable catalytic asymmetric Strecker syntheses of unnatural α-amino acids
作者:Stephan J. Zuend、Matthew P. Coughlin、Mathieu P. Lalonde、Eric N. Jacobsen
DOI:10.1038/nature08484
日期:2009.10
but it is still a challenge to obtain non-natural amino acids. Alkene hydrogenation is broadly useful for the enantioselective catalytic synthesis of many classes of amino acids, but it is not possible to obtain α-amino acids bearing aryl or quaternary alkyl α-substituents using this method. The Strecker synthesis—the reaction of an imine or imine equivalent with hydrogen cyanide, followed by nitrile
[EN] COMPOUNDS AND RELATED METHODS OF USE<br/>[FR] COMPOSÉS ET PROCÉDÉS D'UTILISATION S'Y RAPPORTANT
申请人:HARVARD COLLEGE
公开号:WO2011031764A2
公开(公告)日:2011-03-17
Described herein are compounds of formula (I), related compositions, and their use, for example in the formation of α-amino acids or a precursor thereof such as an α-aminonitrile.