[EN] 10'-FLUORINATED VINCA ALKALOIDS PROVIDE ENHANCED BIOLOGICAL ACTIVITY AGAINST MDR CANCER CELLS [FR] VINCA-ALCALOÏDES 10'-FLUORÉS DOTÉS D'UNE ACTIVITÉ BIOLOGIQUE AUGMENTÉE CONTRE LES CELLULES CANCÉREUSES MULTIRÉSISTANTES
Triarylaminium Radical Cation Promoted Coupling of Catharanthine with Vindoline: Diastereospecific Synthesis of Anhydrovinblastine and Reaction Scope
作者:Byron A. Boon、Dale L. Boger
DOI:10.1021/jacs.9b06968
日期:2019.9.11
vindoline is disclosed, enlisting tris(4-bromophenyl)aminium hexachlororantimonate (BAHA, 1.1 equiv) in aqueous 0.05 N HCl/trifluoroethanol (2-10:1) at room temperature (25 °C), that provides anhydrovinblastine in superb yield (85%) with complete control of the newly formed quaternary C16' stereochemistry. A definition of the scope of aromatic substrates that participate with catharanthine in the BAHA-mediated
公开了一种新的三芳基胺自由基阳离子促进长春花碱与文多林的偶联,在室温 (25°C) 下,在 0.05 N HCl/三氟乙醇 (2-10:1) 水溶液中加入三(4-溴苯基)胺六氯锑酸盐(BAHA,1.1 当量) ),以极好的收率 (85%) 提供脱水长春碱,并完全控制新形成的四元 C16' 立体化学。公开了在 BAHA 介导的非对映选择性偶联反应中与长春花碱一起参与的芳香底物的范围的定义,以及参与反应的长春花碱以外的简化吲哚底物的范围,这些底物确定了参与反应所需的关键结构特征,提供了广义的吲哚与长春花碱或文多林几乎没有结构关系的功能化反应。
Catharanthine C16 substituent effects on the biomimetic coupling with vindoline: Preparation and evaluation of a key series of vinblastine analogues
作者:Annie Tam、Hiroaki Gotoh、William M. Robertson、Dale L. Boger
DOI:10.1016/j.bmcl.2010.09.091
日期:2010.11
The examination of the catharanthine C16 substituenteffects on the Fe(III)-promoted biomimetic coupling reaction with vindoline is detailed, confirming the importance of the presence of a C16 electron-withdrawing substituent, and establishing an unanticipated unique role (>10-fold) that the C16 methyl ester plays in the expression of the natural product properties. Thus, replacement of the vinblastine