Enantioselective Organocatalytic Aza-Ene-Type Domino Reaction Leading to 1,4-Dihydropyridines
作者:Artur Noole、Maria Borissova、Margus Lopp、Tõnis Kanger
DOI:10.1021/jo200095e
日期:2011.3.18
A new general methodology was developed to access highly enantiomerically enriched 1,4-dihydropyridines (DHPs) 3 via an organocatalytic asymmetric aza-ene-type cascade reaction, cocatalyzed by (S)-diarylprolinol−TMS ether V and benzoic acid (BA). Both aliphatic and aryl enals 1 reacted smoothly with enaminones and β-enamino esters 2, affording highly functionalized 1,4-DHPs 3 in high enantioselectivities
开发了一种新的通用方法,可通过(S)-二芳基脯氨醇-TMS醚V和苯甲酸(BA)共同催化的有机催化不对称氮杂-烯型级联反应获得高度对映体富集的1,4-二氢吡啶(DHPs)3。脂族和芳基烯醛1均与烯胺酮和β-烯胺酯2平稳反应,从而以高对映选择性和良好收率提供高度官能化的1,4-DHP 3。