Synthesis of 2-(5-Nitropyrid-2-yl)-3-(4-substitutedphenyl)aminoisoxazol-5(2H)-ones and Their Rearrangements to Imidazo[1,2-a]- pyridines and Indoles with Triethylamine
作者:J. Khalafy、D. Setamdideh、K. Dilmaghani
DOI:10.3390/71200907
日期:——
3-(4-Substitutedphenyl)aminoisoxazol-5(2H)-ones, substituted on nitrogen with a nitropyridine group, react with triethylamine to give imidazo[1,2-a]pyridines and indoles. With 4-bromophenyl and 4-methylphenyl group substituents only imidazopyridines are formed, but the 4-methoxyphenyl derivative gave a 3:1 mixture of the corresponding imidazo[1,2-a]pyridine and 2-pyridylaminoindole, respectively.
3-(4-取代苯基)氨基异恶唑-5(2H)-酮,在氮上被硝基吡啶基团取代,与三乙胺反应得到咪唑并[1,2-a]吡啶和吲哚。4-溴苯基和4-甲基苯基取代基仅形成咪唑并吡啶,但4-甲氧基苯基衍生物分别产生相应的咪唑并[1,2-a]吡啶和2-吡啶氨基吲哚的3:1混合物。