Unequivocal synthesis of 2,3,6-triazaphenothiazine and two new tetraazaphenothiazine heterocycles
作者:Charles O. Okafor、Raymond N. Castle、Dean S. Wise
DOI:10.1002/jhet.5570200441
日期:1983.7
This paper describes the unequivocal synthesis of three new heterocycles: 2, 3, 6-triazaphenothiazine (7) and 2, 3, 6, 9-tetraazaphenothiazine (18), both parents of the respective ring systems and the 6, 8-dihydro-7, 9-di-oxo derivative of 2, 3, 6, 8-tetrahydrophenothiazine (12). These compounds were obtained by base-catalysed condensation of 4, 5-dichloropyridazine (8) with the appropriate o-amino-heterocyclic
本文介绍了三种新杂环的明确合成:2,3,6-三氮杂吩噻嗪(7)和2,3,6,9-四氮杂吩噻嗪(18),它们分别是各自的环系统的母体和6,8-二氢- 2、3、6、8-四氢吩噻嗪的7、9-二氧代衍生物(12)。由4,5二氯(的碱催化缩合得到这些化合物8)与合适的ö氨基杂环硫醇9,11,16。相反,2、3、5-三氯吡嗪(20)与4、6-二氨基嘧啶-5-硫醇(21)和2-氨基-6-甲基吡啶-3-硫醇(28)反应)得到5-氯-2,3-双(二氨基嘧啶基-5-硫代)吡嗪(33)和5-氯-2,3-双(2-氨基-6-吡啶基-3-硫代)吡嗪(29),分别。氯吡嗪(34)和3-氨基吡啶-2(1H)-硫酮(9)遵循后者的反应路径以良好的产率生成2-(3-氨基-2-吡啶基)吡嗪基硫化物(35)。结构分配基于其红外,紫外,核磁共振和质谱。