J. Boukouvalas et N. Lachance, A MILD, EFFICIENT AND GENERAL-METHOD FOR THE SYNTHESIS OF TRIALKYLSILYL (Z)-4-OXO-2-ALKENOATES AND GAMMA-HYDROXYBUTENOLIDES, Synlett, (1), 1998, pp. 31
2-Trialkylsilyloxyfurans react rapidly with dimethyldioxirane at -78 d
egrees C to provide trialkylsilyl (Z)-4-oxo-2-alkenoates whose hydroly
sis delivers gamma-hydroxybutenolides with high efficiency; a short sy
nthesis of a naturally occurring monoterpene gamma-hydroxybutenolide (
4) is reported.