Reaction of α-aminoester with o-bromobenzylbromide or 3-bromo-2-bromomethylindole 1 gives N-alkylation products 3, which further undergo intramolecular acylation upon Br/Li-exchange. This sequence represents the first access to optically active condensed tetrahydropyridin-3-ones 4.
δ-
氨基酯与邻
溴苄
溴或 3-溴-2-
溴甲基吲哚 1 反应生成 N-烷基化产物 3,这些产物在进行 Br/Li- 交换时进一步发生分子内酰化反应。该序列代表了首次获得具有光学活性的缩合四氢
吡啶-3-酮 4 的途径。