The systematic syntheses of 2-alkenylpyrazine N-oxides through palladium-catalyzed C-2 selective CH olefination reaction was disclosed. Various acrylate esters substituted pyrazine N-oxides were obtained in up to 93% yields. Thermogravimetric analysis indicated that the fracture temperature of particular compound 3 f was about 267 °C. The pyrolysis of compound 3 f could generate several aroma compounds
公开了通过
钯催化的C-2选择性C H烯化反应系统合成2-烯基
吡嗪N-氧化物。以高达93%的产率获得了各种
丙烯酸酯取代的
吡嗪N-氧化物。热重分析表明,特定化合物的断裂温度3 ˚F为约267℃。化合物的热分解3 ˚F可能产生几种芳香化合物,如2,5-二甲基,
2,3,5-三甲基吡嗪和
苄醇。热解实验的结果完美地证明了该产品作为潜在的风味添加剂的风味特性。