Synthesis and Azannulation of Pyridinylaminohexadienones.
作者:Maria Teresa COCCO、Cenzo CONGIU、Valentina ONNIS
DOI:10.1248/cpb.49.703
日期:——
4-(2-Pyridinylamino)-1, 1, 1-trifluoro-3-penten-2-ones 3, obtained from the reaction of commercially available 2-aminopyridine derivatives and 4-methoxy-1, 1, 1-trifluoro-3-penten-2-one 2, were converted to 6-(dimethylamino)-4-(2-pyridinylamino)-3, 5-hexadien-2-ones 4 by treatment with dimethylformamide dimethyl acetal. Azannulation of hexadienones 4 afforded 4-(2-pyridinylamino)-2-trifluoromethylpyridines 5 and 2-(trifluoroacetylmethylene)pyrido[1, 2-a]pyrimidines 6, classes of compounds particularly interesting from a chemical and biological point of view.
4-(2-吡啶基氨基)-1,1,1-三氟-3-戊烯-2-酮3,由市售2-氨基吡啶衍生物与4-甲氧基-1,1,1-三氟-3反应得到-戊烯-2-酮 2,转化为 6-(二甲基氨基)-4-(2-吡啶基氨基)-3, 5-己二烯-2-酮4.用二甲基甲酰胺二甲缩醛处理。己二烯酮 4 的氮环化得到 4-(2-吡啶基氨基)-2-三氟甲基吡啶 5 和 2-(三氟乙酰亚甲基)吡啶并[1, 2-a]嘧啶 6,从化学和生物学的角度来看,这些化合物特别令人感兴趣。