Asymmetric syntheses of N-substituted α-amino esters via dynamic kinetic resolution of α-haloacyl diacetone-d-glucose
作者:Hyun Jung Kim、Yongtae Kim、Eui Ta Choi、Min Hee Lee、Eun Sun No、Yong Sun Park
DOI:10.1016/j.tet.2006.04.045
日期:2006.6
Diacetone-d-glucose or d-allose mediated dynamic kinetic resolution of α-halo esters in nucleophilic substitution reaction has been investigated. Reactions with various amine nucleophiles in the presence of TBAI and DIEA can provide the N-substituted α-amino esters up to 99:1 dr. Stereochemical models of transition states, taking into account a hydrogen bonding, are proposed on the basis of the observed results. Also
研究了双丙酮-d-葡萄糖或d-阿洛糖介导的亲核取代反应中α-卤代酯的动态动力学拆分。在TBAI和DIEA的存在下与各种胺亲核试剂的反应可以提供高达99:1 dr的N-取代的α-氨基酯。基于观察到的结果,提出了考虑氢键的过渡态立体化学模型。同样,证明了这种温和而简单的方法在1,1'-亚氨基二羧酸衍生物的立体选择性制备中的应用。