The Effects of Lewis Acid on the 1,3-Dipolar Cycloaddition Reaction of C-Arylaldonitrones with Alkenes.
作者:Tomio Shimizu、Masaya Ishizaki、Nobuo Nitada
DOI:10.1248/cpb.50.908
日期:——
The regio- and stereoselectivity of the 1,3-dipolarcycloaddition reactions of C-aryl-N-alkylaldonitrones (1a-e) with somealkenes were found to be affected significantly by the addition of Lewis acid. The rate of the reaction was also affected by adding the Lewis acid. In the reactions using allyl alcohol as a dipolarophile an addition of Lewis acid caused a remarkable acceleration of the reaction
One-Pot Synthesis of Functionalized Nitrones from Nitro Compounds
作者:Valérie Gautheron-Chapoulaud、Shashi U. Pandya、Pascale Cividino、Géraldine Masson、Sandrine Py、Yannick Vallée
DOI:10.1055/s-2001-16042
日期:——
The zinc-mediated reduction of nitroalkanes and nitroarenes in the presence of aldehydes is an efficient method to synthesize a wide range of nitrones. This method is mild enough to accommodate a variety of functional groups. It is particularly useful when the intermediate hydroxylamines are unstable and/or water-soluble. We used it to prepare several aromatic, aliphatic and highly functionalized sugar-derived nitrones.
(TGA) and diffuse reflection spectroscopy (DRS). The CdSnanorods have 12–18 nm sizes according to TEM. The catalyst was used successfully in the chemoselective photocatalytic reduction of nitroarenes using a CdS/poly ethyleneglycol 400–water system (CdS/PEG–H2O). The reaction was successfully carried out under green and blue LED illumination by using ammonium formate as a sacrificial electron donor in
Here we report a paired electrochemical coupling of readily accessible nitro-compounds with benzyl alcohols to yield nitrone derivatives. In this work, electrochemical behavior of nitrobenzene and benzyl alcohol derivatives was studied by cyclic voltammetry and controlled potential coulommetry. Electrochemical reactions have been performed in aqueous/ethanol (or acetonitrile) solutions by employing
Synthesis and Characterization of Model Ultimate Carcinogens/Metabolites Derived from Lead Tetraacetate Oxidation of Arylnitrones: 2′-Deoxyguanosine Adducts
作者:Kanchugarakoppal Rangappa、Honnaiah Mallesha、Kodagahally Ravi Kumar、Kempegowda Mantelingu
DOI:10.1055/s-2001-16096
日期:——
The synthesis of model reactive metabolites 4a-c by leadtetraacetate (LTA) oxidation of arylnitrones 3a-c is described. Compounds 4a-c react with deoxyguanosine (dG) to give N-benzoylated C8-adducts 5a-c. Following debenzoylation with the heterogeneous system (sodium carbonate/methanol) leads to the corresponding C8-adducts 6a-c.