A convenient solvent-free synthesis of γ-nitroketones and γ-nitroesters based on the reaction of nitroalkanes with α,β-unsaturated carbonyl compounds in the ultrasonically activated heterogeneous catalytic system 1-butyl-3-methylimidazolium tetra-fluoroborate ([bmim][BF4])/K2CO3 has been developed. The system retained its catalytic activity over three reaction cycles.
Michael Addition of Secondary Nitroalkanes to β-Substituted α,β-Unsaturated Compounds
作者:Noboru Ono、Akio Kamimura、Aritsune Kaji
DOI:10.1055/s-1984-30780
日期:——
ONO, NOBORU;KAMIMURA, AKIO;KAJI, ARITSUNE, SYNTHESIS, BRD, 1984, N 3, 226-227
作者:ONO, NOBORU、KAMIMURA, AKIO、KAJI, ARITSUNE
DOI:——
日期:——
Merrifield Resin−C<sub>6</sub>H<sub>4</sub>CH<sub>2</sub>N<sub>3</sub>P(MeNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: An Efficient Reusable Catalyst for Room-Temperature 1,4-Addition Reactions and a More Convenient Synthesis of Its Precursor P(MeNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N
作者:Reddy、John G. Verkade
DOI:10.1021/jo062505z
日期:2007.4.1
donors were efficiently catalyzed at room temperature by the title reusable Merrifield resin-supported catalyst. Advantages of this catalyst include a simple workup (filtration of the reaction mixture) and good to excellent product yields. We also report a substantially simplified synthesis of the commercially available strong nonionic base 1, a precursor to the title polymer-bound catalyst.