Asymmetric Synthesis of α-Amino Carbonyls (Aldehydes, Ketones and Acids) using Lithium (R)-N-benzyl-N-α-methylbenzylamide
作者:Stephen G. Davies、Simon W. Epstein、Osamu Ichihara、Andrew D. Smith
DOI:10.1055/s-2001-17449
日期:——
The diastereoselective conjugate addition of lithium (R)-N-benzyl-N-α-methylbenzylamide to α,β-unsaturated esters and subsequent enolate hydroxylation, followed by reduction and oxidative cleavage provides a facile route to N,N-protected α-amino aldehydes and ketones. Further manipulation furnishes α-amino acids in high enantiomeric excess.
锂 (R)-N-苯甲基-N-α-甲基苯甲酰胺的非对映选择性共轭加成到 α,β-不饱和酯上,随后进行烯醇化羟基化,然后进行还原和氧化裂解,为 N,N-保护的 α 提供了一条简便的途径±-氨基醛和酮。进一步的操作提供了高对映体过量的α-氨基酸。