Synthesis of 6-aryl-1,3-dimethyl-6,7-dihydro-6-azalumazin-7-(6<i>H</i>)ones and their conversion into 2-aryl-1,2,4-triazine-3,5-(2<i>H</i>,4<i>H</i>)odiones. A new synthesis of 1-aryl-6-azauracils
作者:Fumio Yoneda、Masatsugu Higuchi
DOI:10.1002/jhet.5570170702
日期:1980.11
N′-carbonyldiimidazole gave the respective 6-aryl-1,3-dimethyl-6,7-dihydro-6-azalumazin-7-(6H)ones, which were hydrolyzed with alkali to afford 2-aryl-2,3,4,5-tetrahydro-3,5-dioxo-1,2,4-triazine-6-carboxylic acids (1-aryl-6-azauracil-5-carboxylic acids). Thermal decomposition of these carboxylic acids gave the corresponding 2-aryl-1,2,4-triazine-3,5-(2H,4H)diones (1-aryl-6-azauracils). Methylation of the latter with
用尿素或N,N′-羰基二咪唑处理6-氨基-5-芳基偶氮-1,3-二甲基尿嘧啶,得到相应的6-芳基-1,3-二甲基-6,7-二氢-6-azalumazin-7-( 6 H)酮,将其用碱水解,得到2-芳基-2,3,4,5-四氢-3,5-二氧代-1,2,4-三嗪-6-羧酸(1-芳基-6 -氮杂嘧啶-5-羧酸)。这些羧酸的热分解得到相应的2-芳基-1,2,4-三嗪-3,5-(2 H,4 H)二酮(1-芳基-6-氮杂嘧啶)。后者与碘甲烷甲基化,得到相应的2-芳基-4-甲基-1,2,4-三嗪-3,5-(2 H,4 H)二酮(1-芳基-3-甲基-6-金刚烷酰胺)。