Triclorosilane-mediated stereoselective synthesis of β-amino esters and their conversion to highly enantiomerically enriched β-lactams
作者:Stefania Guizzetti、Maurizio Benaglia、Martina Bonsignore、Laura Raimondi
DOI:10.1039/c0ob00570c
日期:——
A highly stereoselective trichlorosilane-mediated reduction of N-benzyl enamines was developed; the combination of a low cost, easy to make metal-free catalyst and an inexpensive chiral auxiliary allowed to perform the reaction on substrates with different structural features often with total control of the stereoselectivity. By easy deprotection through hydrogenolysis followed by conversion of β-aminoester
已经开发出高度立体选择性的三氯硅烷介导的N-苄基烯胺的还原;低成本,易于制造的不含金属的催化剂与廉价的手性助剂的结合,通常可以完全控制立体选择性,从而在具有不同结构特征的底物上进行反应。通过容易的氢解脱保护,然后将β-氨基酯转化为2-氮杂环丁酮,对映体纯的β-内酰胺(> 98%ee)成功地完成了合成。