A new and effective route to (±)-botryodiplodin and (±)-epi-botryodiplodin acetates using a halogen atom transfer Ueno–Stork cyclization
作者:Laurent De Buyck、Cristina Forzato、Franco Ghelfi、Adele Mucci、Patrizia Nitti、Ugo M. Pagnoni、Andrew F. Parsons、Giuliana Pitacco、Fabrizio Roncaglia
DOI:10.1016/j.tetlet.2006.08.121
日期:2006.10
(+/-)-Botryodiplodin and (+/-)-epi-botryodiplodin acetates were prepared in good yields following a practical four step route. The method, for the construction of the strategic tetrahydrofuran ring, hinged on an unprecedented halogen atom transfer Ueno-Stork cyclization of an O-allyl alpha,alpha-dihalohemiacetal acetate, catalyzed by the redox complex CuCl/N,N,N ',N '',N ''-pentamethyldiethylenetriamine. (c) 2006 Elsevier Ltd. All rights reserved.
(±)-Botryodiplodin 和 (±)-epi-botryodiplodin 的醋酸酯在良好产率下通过一个实际的四步路线制备。该方法在构建战略性的四氢呋喃环时,基于前所未有的卤素原子转移 Ueno-Stork 环化反应,涉及 O-烯丙基α,α-二卤半缩醛醋酸酯,该反应由 CuCl/N,N,N',N'',N''-五甲基二乙三胺的氧化还原复合物催化。(c) 2006 Elsevier Ltd. 保留所有权利。