One-Pot Catalytic Asymmetric Synthesis of Pyranones
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. Catalyticasymmetric 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%