作者:Venkatapuram Padmavathi、Akula Balaiah、Dandu Bhaskar Reddy
DOI:10.1002/jhet.5570390408
日期:2002.7
5-diaryl-3,3-disubstituted-1,5-pentanedione on reaction with ammonium acetate, phosphorus pentoxide and phosphorus pentasulfide gave respective 1,4-dihydropyridine, 4H-pyran and 4H-thiopyran. Novel spiro heterocycles have been obtained by the cyclocondensation of 4H-thiopyran with hydrazine, hydroxylamine, urea and thiourea.
与乙酸铵,五氧化二磷和五硫化二磷反应后的1,5-二芳基-3,3-二取代的1,5-戊二酮分别得到1,4-二氢吡啶,4 H-吡喃和4 H-硫代吡喃。通过将4 H-硫吡喃与肼,羟胺,尿素和硫脲进行环缩合反应,获得了新型螺环杂环。