申请人:University of Bristish Columbia
公开号:US05047528A1
公开(公告)日:1991-09-10
The present invention relates to the synthesis of dimer alkaloid compounds, particularly those of the Catharantus (Vinca) family, from an indole unit, such as cantharanthine, and a dihydroindole unit, such as vindoline. A multi-step process is disclosed including the steps of (1) of 1,4-reduction of a first dimeric iminium intermediate to an enamine compound by reaction with a 1,4-dihydropyridine compound; (2) oxidative transformation of the resulting enamine to a second iminium intermediate under controlled aeration; (3) reduction of the second iminium intermediate to form the target dimer alkaloid compounds. The entire process can be conducted in a one-pot operation to obtain the target compounds without isolation of the intermediates.
本发明涉及从吲哚单元(如cantharanthine)和二氢吲哚单元(如vindoline)合成二聚生物碱化合物,特别是Catharantus(Vinca)家族的化合物。揭示了一种多步法,包括以下步骤:(1)通过与1,4-二氢吡啶化合物反应,将第一二聚亚胺中间体还原为烯胺化合物;(2)在控制通气条件下,将所得的烯胺氧化转化为第二个亚胺中间体;(3)还原第二个亚胺中间体以形成目标二聚生物碱化合物。整个过程可以在一个反应器中进行,获得目标化合物而无需分离中间体。