3-Methyl-1,2,4-benzotriazine and some of its derivatives were prepared in moderate yields (50–70%) via a reductive cyclization by a PtO2-catalyzed hydrogenation of the corresponding 2-nitrophenylhydrazones of the pyruvic acid. The latter compounds were obtained in yields higher than 90% by reacting 2-nitrophenylhydrazines with sodium pyruvate salt. Three 3-phenyl-1,2,4-benzotriazine compounds were
3-甲基-
1,2,4-苯并三嗪及其一些衍
生物是通过还原环化反应制备的,产率适中(50-70%),通过 PtO2 催化氢化相应的
丙酮酸 2-
硝基苯腙。通过使 2-
硝基苯肼与
丙酮酸钠盐反应,后一种化合物的收率高于 90%。三种 3-苯基-
1,2,4-苯并三嗪化合物也通过还原环化反应生产,通过 Pt/C 催化氢化其相应的 2-
硝基苯腙-醚以高产率 (>70%)。© 2006 Wiley Periodicals, Inc. 杂原子
化学 17:166–172, 2006; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20200