An efficient catalytic synthesis of α-amino-β-keto esters has been newly developed. Cross-coupling of various aldehydes with α-imino ester, catalyzed by N-heterocyclic carbene, leads chemoselectively to α-amino-β-keto esters in moderate to good yields with high atom efficiency. The reaction mechanism is discussed, and it is proposed that the α-amino-β-keto esters are formed under thermodynamic control.
一种高效催化合成α-氨基-β-酮酸酯的新方法已经开发出来。在N-杂环卡宾的催化下,各种醛与α-亚胺酯进行交叉偶联反应,高选择性地得到中等至良好收率、高原子效率的α-氨基-β-酮酸酯。讨论了反应机理,并提出α-氨基-β-酮酸酯是在热力学控制下形成的。