Synthesis of new 2,2′-disubstituted 5,5′-dimethyl-4,4′-bitriazoles and 2-(4-Triazolyl)quinoxalines
作者:Francesco Paolo Invidiata、Stefania Aiello、Giancarlo Furno'、Enrico Aiello、Daniele Simoni、Riccardo Rondanin
DOI:10.1002/jhet.5570370221
日期:2000.3
Thermal rearrangement of 3-acylisoxazole arylhydrazones allowed facile preparation of 2H-1,2,3-triazoles which were firstly reacted with isoamyl nitrite and then with an opportune arylhydrazine to produce the corresponding α-hydroxyiminohydrazones 8a-h. The reaction of compounds 8a-h with phosphorus pentachloride afforded the desired 4,4′-bitriazoles 1a-h. The α-hydroxyiminoketone derivative 7 or the
3-酰基异恶唑芳基的热重排使得可以容易地制备2 H -1,2,3-三唑,其首先与亚硝酸异戊酯反应,然后与适当的芳基react反应生成相应的α-羟基亚氨基hydr 8a-h。化合物8a-h与五氯化磷反应,得到所需的4,4'-双三唑1a-h。α-羟基亚氨基酮衍生物7或α-二酮14易于与1,2-苯二胺反应,得到在位置4带有喹喔啉部分的1,2,3-三唑2a-c。提高了喹喔啉2a-c的产率当1,2-苯二胺与二肟15反应时获得