Sodium Borohydride as the Only Reagent for the Efficient Reductive Alkylation of Malononitrile with Ketones and Aldehydes
作者:Robert E. Sammelson、Jason C. Dunham、Adam D. Richardson
DOI:10.1055/s-2006-926307
日期:——
malononitriles has been developed. In this method, sodium borohydride in isopropanol has a catalytic effect on the initial condensation between malononitrile and aldehydes or ketones at 0 °C. The sodium borohydride also simultaneously acts as a reagent and reduces the unsaturated intermediate formed in situ by the condensation. This simple reductive alkylation method effectively consumes all malononitrile
Michael Addition of Active Methylene Compounds to α,β-Unsaturated Carbonyl Compounds under the Influence of Molecular Sieves in Dimethyl Sulfoxide
作者:Tomoko Kakinuma、Ryoichi Chiba、Takeshi Oriyama
DOI:10.1246/cl.2008.1204
日期:2008.12.5
The Michael addition of active methylene compounds to α,β-unsaturated carbonyl compounds in the presence of MS 4A in dimethyl sulfoxide proceeds smoothly to afford the corresponding 1,4-addition pr...
Selective Synthesis of Unsymmetrical Peroxides: Transition-Metal-Catalyzed Oxidation of Malononitrile and Cyanoacetic Ester Derivatives by tert-Butyl Hydroperoxide at the α-Position
malononitrile and cyanoaceticester derivatives at the α-position based on transition-metal-catalyzed reaction (Cu, Fe, Mn, Co) with tert-butyl hydroperoxide giving unsymmetrical peroxides in 63-94% yields. The method is facile, does not require large excesses of reagents, and is amenable to gram-scale synthesis. peroxides - tert-butyl hydroperoxide - catalysis - oxidation - transition metals - malononitrile