Synthesis of some new 4-styryltetrazolo[1,5-a]quinoxaline and 1-substituted-4-styryl[1,2,4]triazolo[4,3-a]quinoxaline derivatives as potent anticonvulsants
作者:Shivananda Wagle、Airody Vasudeva Adhikari、Nalilu Suchetha Kumari
DOI:10.1016/j.ejmech.2008.06.006
日期:2009.3
4-methyl-1-(substituted)[1,2,4]triazolo[4,3-a]quinoxalines (7a–c). Further, reaction of 7a–c with different aromatic aldehydes furnished the title compounds, 4-styryl-1-(substituted)[1,2,4]triazolo[4,3-a]quinoxalines (8a–i) in good yield. In another scheme, the hydrazino compound 5 was treated with different aromatic aldehydes to yield corresponding N-arylidenehydrazino quinoxalines (6a–d). Further, the
通过2-氯-3-甲基喹喔啉(2)的叠氮化物环缩合制备4-甲基四唑并[1,5- a ]喹喔啉(3)。3 与芳族醛的反应提供了4-苯乙烯基四唑并[1,5- a ]喹喔啉(4a – f)。用水合肼处理化合物2,得到2-肼基-3-甲基喹喔啉(5)。5的闭环是通过原酸酯与三氟乙酸反应生成4-甲基-1-(取代)[1,2,4]三唑并[4,3- a ]喹喔啉(7a – c)来实现的。进一步,反应具有不同芳族醛的7a – c提供了高收率的标题化合物4-styryl-1-(取代)[1,2,4]三唑并[4,3- a ]喹喔啉(8a – i)。在另一个方案中,肼化合物5用不同的芳族醛处理,得到相应的N-亚芳基肼基喹喔啉(6a – d)。此外,通过硝基苯的氧化环化反应生成1-芳基-4-甲基[1,2,4]三唑并[4,3- a ]喹喔啉(7d – g),与芳族醛缩合后得到标题化合物, 1-芳基-4-苯乙烯基[1,2,4]三唑[4