Efficient Synthesis of (<i>E</i>)-3-Alkylidene-2(3<i>H</i>)-furanones from 3-(1-Hydroxyalkyl)-2-silyloxyfurans
作者:John Boukouvalas、Olivier Marion
DOI:10.1055/s-2006-944202
日期:2006.6
Several unsubstituted (E)-3-alkylmethylidene- and (E)-3-(arylmethylidene)-2(3H)-furanones have been synthesized in highly stereoselective fashion by mesylation-elimination of 3-(1-hydoxyalkyl)-2-silyloxyfurans. The latter were prepared from 2-tri-isopropylsilyloxy-3-bromofuran by halogen-lithium exchange and reaction of the in situ generated 3-lithiated silyloxyfuran with aldehydes.