Reaction of opticallyactive nitroalkanes with allyl Grignard reagents affords E-Z mixtures of nitrones which can be reduced to chiral hydroxylamines and amines.
旋光性硝基烷与烯丙基格利雅试剂的反应得到硝酮的E - Z混合物,其可以还原为手性羟胺和胺。
Nitroalkanes and ethyl glyoxalate as common precursors for the preparation of both β-keto esters and α,β-unsaturated esters
acrylic esters, obtained by the reaction of nitroalkanes and ethylglyoxalate, are the key building blocks for the immediate synthesis of both the title compounds. In fact, their treatment with titanium trichloride produce the direct conversion to the β-keto esters, while their reaction with sodium boron hydride gives the one-pot synthesis of α,β-unsaturated esters through formal substitution of the
Reaction of urea-hydrogen peroxide complex with trifluoroaceticanhydride in acetonitrile at 0°C affords in a safe and easy fashion anhydrous solutions of peroxytrifluoroacetic acid. These can be used to oxidize aldoximes to nitroalkanes in good yields. Ketoximes fail to react in these conditions and are cleaved to the parent carbonyl compounds.