A low loading of a quinine-derived squaramide efficiently catalyzes the triple-domino Michael/aza-Henry/cyclization reaction between 1,3-dicarbonyl compounds, β-nitroolefins, and aldimines to provide tetrahydropyridines bearing three contiguous stereogenic centers in good yields, excellent enantiomeric excesses, and up to high diastereomeric ratios.
                                    低负载的
奎宁衍生的方酰胺有效地催化 1,3-二羰基化合物、β-硝基烯烃和醛
亚胺之间的三多米诺 Michael/aza-Henry/环化反应,以良好的收率提供具有三个连续立体中心的四氢
吡啶。对映体过量,以及高达高的非对映体比率。