Synthesis of (E)-nitroolefins via decarboxylative nitration using t-butylnitrite (t-BuONO) and TEMPO.

@article{Manna2013SynthesisO,
  title={Synthesis of (E)-nitroolefins via decarboxylative nitration using t-butylnitrite (t-BuONO) and TEMPO.},
  author={Srimanta Manna and Sandipan Jana and Tapish Saboo and Arun Maji and Debabrata Maiti},
  journal={Chemical communications},
  year={2013},
  volume={49 46},
  pages={5286-8}
}
Nitroolefins are usually synthesized using the Henry reaction. Here we report an alternative metal-free decarboxylative nitration protocol for the preparation of the nitroolefins from α,β-unsaturated carboxylic acids using t-butylnitrite (t-BuONO) and TEMPO. α,β-Unsaturated carboxylic acids bearing β-aromatic and β-heteroaromatic substituents gave (E)-nitroolefins exclusively under mild conditions. A radical based pathway has been proposed for this decarboxylative nitration reaction. 

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Tetrahedron Lett.2010,51, 5577

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