Synthesis of <i>N</i>-aryl β-amino acid derivatives <i>via</i> Cu(<scp>ii</scp>)-catalyzed asymmetric 1,4-reduction in air
作者:Min Li、Hong-Feng Xia、Li-Yao Yang、Tao Hong、Lin-Jie Xie、Shijun Li、Jing Wu
DOI:10.1039/c9ra01203f
日期:——
polymethylhydrosiloxane (PMHS) as well as certain amounts of appropriate alcohol and base additives, the non-precious metal copper-catalyzed asymmetric 1,4-hydrosilylation of β-aryl or β-alkyl-substituted N-aryl β-enamino esters was well realized to afford a diverse range of N-aryl β-amino acid esters in high yields and excellent enantioselectivities (26 examples, 90–98% ee). This approach tolerated the handling of
在廉价且稳定的化学计量还原剂聚甲基氢硅氧烷(PMHS)以及一定量的适当醇和碱添加剂存在下,非贵金属铜催化的β-芳基或β-烷基取代的不对称1,4-氢化硅烷化反应N-芳基 β-烯氨基酯可以以高产率和优异的对映选择性提供多种N-芳基 β-氨基酸酯(26 个实例,90-98% ee)。这种方法可以耐受空气中催化剂和反应物的处理,无需特殊的预防措施。获得的手性产物已成功转化为相应的对映体富集的β-内酰胺和未保护的β-氨基酸酯,这突出了所开发的催化方法的合成效用。