alkaloid-catalyzed [4 + 2] cyclocondensation of α,β-unsaturated acyl chlorides with imines is developed to give the corresponding substituted dihydropyridinones in good yields with high to excellent enantioselectivities. Reduction of the dihydropyridinones gave highly optically active substituted tetrahydropyridinone and piperidine derivatives.
开发了
金鸡纳
生物碱催化的
亚胺与α,β-不饱和酰
氯的[4 + 2]环缩合反应,可以以高收率和高至优异的对映选择性提供相应的取代
二氢吡啶并酮。
二氢吡啶酮的还原得到高度旋光的取代的四氢
吡啶酮和
哌啶衍
生物。