A novel and direct synthetic route to substituted 1,5-dihydro-4<i>H</i>-[1]benzopyrano[4,3-<i>b</i>]pyridine-4,5-diones
作者:Jan Světlík、Nad'A Prónayová、Vladimír Hanuš
DOI:10.1002/jhet.5570370227
日期:2000.3
condensation of 4-hydroxy-6-methyl-2H-pyran-2-one and substituted 2-hydroxybenzaldehydes with ammonium acetate gave the title heterocycles. Synthesis of 1,5-dihydro-2-methyl-4H-[1]naphtho-[1′,2′:5,6]pyrano[4,3-b]-pyridine-4,5-dione is also described. A reaction mechanism is discussed.
的4-羟基-6-甲基-2-缩合ħ -吡喃-2-酮和取代的2-羟基苯甲醛与乙酸铵,得到标题杂环。还描述了1,5-二氢-2-甲基-4 H- [1]萘-[1',2':5,6]吡喃并[4,3 - b ]-吡啶-4,5-二酮的合成。讨论了反应机理。