发明名称 PROCESS FOR THE PREPARATION OF ENANTIOMERICALLY ENRICHED N-ACYL-BETA-AMINO ACID DERIVATIVES BY ENANTIOSELECTIVE HYDROGENATION OF THE CORRESPONDING (Z)-ENAMIDES
摘要 <p>A process for the preparation of an enantiomerically enriched beta-amino acid derivative of formula (1), or the opposite enantiomer thereof, wherein R1 is an optionally substituted alkyl, aryl or heteroaryl group of up to 20 C atoms, R2 is ann alkyl group of up to 20 C atoms, and R3 is H or an alkyl or aryl group of up to 20 C atoms, which comprises asymmetric hydrogenation of the (z)-enamide precursor (2) in an alcohol solvent or cosolvent, catalysed by a cationic rhodium complex of a chiral phosphine ligand having the partial formula (3), wherein n is 0 to 6 and R represents at least one non-hydrogen organic group of up to 20 C atoms.</p>
申请公布号 WO2003016264(A1) 申请公布日期 2003.02.27
申请号 US2002026142 申请日期 2002.08.16
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