Synthesis of Chiral α,β-Unsaturated γ-Amino Esters via Pd-Catalyzed Asymmetric Allylic Amination
作者:Chao Xia、Jiefeng Shen、Delong Liu、Wanbin Zhang
DOI:10.1021/acs.orglett.7b01904
日期:2017.8.18
A Pd-catalyzed asymmetric allylic amination of 4-substituted 2-acetoxybut-3-enoates with amines has been developed for the regiospecific synthesis of chiral α,β-unsaturated γ-amino esters. The desired chiral aminated products can be obtained in up to 98% yield, and 99% ee and can be conveniently transformed to chiral γ-amino acid/alcohol derivatives and chiral γ-lactams, which can then be subjected
已经开发了Pd催化的4-取代的2-乙酰氧基丁-3-烯酸酯与胺的不对称烯丙基胺化,用于手性α,β-不饱和γ-氨基酯的区域特异性合成。可以以高达98%的收率和99%ee的产率获得所需的手性胺化产物,并且可以方便地将其转化为手性γ-氨基酸/醇衍生物和手性γ-内酰胺,然后可以对其进行几种类型的合成手性药物和候选药物。手性γ-氨基酯的优先形成可能归因于烯丙基底物右侧的庞大取代基。这项工作为合成手性α,β-不饱和γ-氨基酯及其衍生物提供了有效的策略。