The first synthesis of the antiinflammatory marine natural product luffariellolide has been achieved by a convergent pathway involving sp3-sp3 cross-coupling and silyloxyfuran oxyfunctionalisation as key steps. An illustration of the inherent flexibility of this strategy is provided by a simple synthesis of α,β-acariolide and its γ-hydroxylated derivative from a common silyloxyfuran precursor.
A Mild, Efficient and General Method for the Synthesis of Trialkylsilyl (<i>Z</i>)-4-Oxo-2-alkenoates and γ-Hydroxybutenolides
作者:John Boukouvalas、Nicolas Lachance
DOI:10.1055/s-1998-1574
日期:1998.1
2-Trialkylsilyloxyfurans react rapidly with dimethyldioxirane at -78 °C to provide trialkylsilyl (Z)-4-oxo-2-alkenoates whose hydrolysis delivers γ-hydroxybutenolides with high efficiency; a short synthesis of a naturally occurring monoterpene γ-hydroxybutenolide (4) is reported.
2-Trialkylsilyloxyfurans 与二甲基二环氧乙烷在 -78 °C 下快速反应,生成三烷基硅 (Z)-4-oxo-2- 烷烯酸酯,其水解反应可高效生成δ-羟基丁烯内酯;报告了天然单萜δ-羟基丁烯内酯 (4) 的简短合成。
3-(4-Methyl-3-pentenyl)-2(5<i>H</i>)-furanone, α,α-Acariolide and 4-(4-Methyl-3-pentenyl)-2(5<i>H</i>)-furanone, α,β-Acariolide:
monoterpene lactone from the acarid mite, Schwiebea araujoae, was elucidated without its isolation by GC/FT-IR and GC/MS analyses to be 3-(4-methyl-3-pentenyl)-2(5H)-furanone (1) and tentatively named as alpha,alpha-acariolide. The structure of 1 was identified by its synthesis from alpha-bromo-gamma-butyrolactone via 4 reaction steps. The synthesized compound gave the same GC/MS and GC/FT-IR spectra as those
structure–odor relationships, we synthesized 13 analogs of compound 1 and evaluated their odors. As a result, it was found that the presence of two double-bonds and branched methyl group at the terminal position in the side chain was essential in order to have a citrus-like odor. Substitution of the side chain with appropriate length at the appropriate 4-position of the 2(5H)-furanone ring was also an important