The reaction of α,β-unsaturated nitro compounds with aldehydes or electron deficient olefins, in the presence of a base provides a simple method for the preparation of α-substituted allylic nitro compounds. The initially formed allylic carbanion reacts regioselectively at the position α to the nitro group. The products formed, γ,δ-unsaturated β-nitro alcohols 2 and δ,ε-unsaturated γ-nitro ketones, esters, nitriles, and sulfones 3, can serve as useful synthetic intermediates.
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.
erythro-Selective conjugate addition of benzeneselenol to (E)-nitroalkenes and subsequent syn-elimination of benzeneselenenic acid provide a new method for the conversion of (E)-nitroalkenes into (Z)-nitroalkenes.