A formal synthesis of (±)-tabersonine (1) and a total synthesis of (±)-cleavamine (2) have been achieved via a common intermediate (6) derived from ethyl 1, 6-dihydro-3 (2H)-pyridinone-1-carboxylate (5a). The successful cyclization of the carboxylic acid (20) to the dioxocleavamine (4) is also discussed.
通过由 1, 6-二氢-3 (2H)-
吡啶酮-1-
羧酸乙酯 (5a) 衍生出的共同中间体 (6) 实现了 (±)-tabersonine (1) 的正式合成和 (±)-cleavamine (2) 的全合成。此外,还讨论了
羧酸 (20) 成功环化为二氧环拉明 (4) 的过程。