Unexpected Heterocyclization of Electrophilic Alkenes by Tetranitromethane in the Presence of Triethylamine. Synthesis of 5-Nitroisoxazoles
作者:Yulia A. Volkova、Elena B. Averina、Dmitry A. Vasilenko、Kseniya N. Sedenkova、Yuri K. Grishin、Per Bruheim、Tamara S. Kuznetsova、Nikolai S. Zefirov
DOI:10.1021/acs.joc.8b03086
日期:2019.3.15
A novel reaction of tetranitromethane with electrophilic alkenes in the presence of triethylamine affording substituted 5-nitroisoxazoles is described. Triethylamine reacts with tetranitromethane to generate N-nitrotriethylammonium and trinitromethanide. This process provides the heterocyclization of electrophilic alkenes. A variety of α,β-unsaturated aldehydes, ketones, esters, amides, phosphonates
描述了在三乙胺存在下四硝基甲烷与亲电烯烃的新型反应,提供了取代的5-硝基异恶唑。三乙胺与四硝基甲烷反应生成N-硝基三乙铵和三硝基甲烷。该过程提供了亲电烯烃的杂环化。各种α,β-不饱和醛,酮,酯,酰胺,膦酸酯,硝基和硫化合物参与了杂环化反应,并以良好或高收率获得了多种官能化的5-硝基异恶唑。讨论了反应的范围和局限性以及机理建议。