作者:Kevin Cheng、Ann Rowley Kelly、Rachel A. Kohn、Jessica F. Dweck、Patrick J. Walsh
DOI:10.1021/ol900905r
日期:2009.6.18
Enantioenriched pyranones are important intermediates in the synthesis of natural products and the generation of compound libraries. A one-pot method for their synthesis is outlined. Catalytic asymmetric alkylation of 2-furfurals in the presence of catalytic (−)-MIB generates enantioenriched furyl zinc alkoxides. Addition of water/THF followed by NBS results in formation of pyranones with ee’s >90%
对映体富集的吡喃酮是天然产物合成和化合物库生成的重要中间体。概述了它们合成的一锅法。在催化 (-)-MIB 存在下,2-糠醛的催化不对称烷基化生成对映体富集的呋喃基醇锌。添加水/THF,然后添加 NBS 导致形成 ee>90% 的吡喃酮,产率在 46-77% 之间。