La reaction de l'α-phenylsulfinylacetonitrile avec les aldehydes ou les cetones conduit directement aux γ-hydroxyalcenenitriles. On prepare la dendrolasine, la sirenine et l'acide tetramethyl-3,7,11,15 hexadecapentaene-2,4,6,10,14 oique
La 反应 de l'α-苯基亚磺酰基乙腈 avec les 醛 ou les cetones 管道定向辅助 γ-羟基烯腈。关于制备 la dendrolasine, la sirenine et l'acide tetramethyl-3,7,11,15 hexadecapentaene-2,4,6,10,14 oique
A Convenient Approach to Enantioenriched
Cyclopropanes Bearing Electron-Withdrawing Functionalities
作者:Henryk Krawczyk、Katarzyna Wąsek、Jacek Kędzia
DOI:10.1055/s-0028-1088034
日期:——
1,2-Disubstituted cyclopropanes with different electron-withdrawing groups were accessed stereospecifically from similarly functionalized γ-hydroxy-α,β-unsaturated compounds.
α,β,γ,δ-Unsaturated carbonyl compounds were converted regioselectively into γ-hydroxy-α,β-unsaturated carbonyl compounds by reduction-oxygenation with molecular oxygen and triethylsilane in the presence of cobalt(II) porphyrin as a catalyst followed by treatment with trimethyl phosphite. (±)-6-Hydroxyshogaol and related furanoids isolated from ginger were synthesized via this method.