alumina is found to promote the conjugate addition of indoles to nitroalkenes in solventlessconditions at 60 °C. Nitroalkenes can be replaced by nitro alcohols that are converted into nitroolefins under the reaction conditions. Alternatively, a tandem nitroaldol-dehydration allows the utilization of nitroalkanes and aldehydes as remote precursors of reactive nitroalkenes in a ‘one–pot’ synthesis of 3-substituted
REDUCTIVE CONVERSION OF NITRO ALKENES TO KETONES AND/OR OXIMES IN AN AQUEOUS HClO<sub>4</sub>–CH<sub>2</sub>Cl<sub>2</sub>–DIOXANE–(Pb) SYSTEM
作者:Sigeru Torii、Hideo Tanaka、Tetsuo Katoh
DOI:10.1246/cl.1983.607
日期:1983.4.5
Electrochemical and chemical reduction of nitroalkenes in an aqueous HClO4–CH2Cl2–dioxane–(Pb) system afforded ketones and oximes in good yields, each of which can be obtained selectively by treating with either aqueous formaldehyde or hydroxylamine as a proper workup process, respectively.
A Facile Procedure for the Conversion of Nitroolefins into Carbonyl Compounds Using Al-NiCl<sub>2</sub>·6H<sub>2</sub>O-THF System
作者:Maitreyee S. Bezbarua、Ghanashyam Bez、Nabin C. Barua
DOI:10.1246/cl.1999.325
日期:1999.4
It has been demonstrated that a variety of nitroolefins can be efficiently converted into the corresponding carbonyl compounds by the reaction with an Al-NiCl2·6H2O-THF system.
absence of the double bond next to the nitro group. The peroxyl radical scavenger capacity of the p-dimethylaminophenyl-derivatives was even higher, being the reduced form of these compounds even more active. In fact, while the antioxidant capacity of 1-dimethylamino-4-(2-nitro-1Z-ethenyl)benzene and 1-dimethylamino-4-(2-nitro-1Z-propenyl)benzene was 4.2 ± 0.1 and 5.4 ± 0.1 Trolox Eq/mol, respectively; ORAC