作者:H. M. Moustafa
DOI:10.1080/104265090508460
日期:2005.1.1
, 5 . Treatment of compound 1 with bromine in 1:2 molar ratio afforded 2,2-dibromo derivative 6 . Compound 6 reacted with bidentates, or with CS 2 and reactive methylenes to give the corresponding spiro compounds 7a–f and 8a–d , respectively. 2-(2-Bromo-4-methyl-3,4-dihydro-2H-1,4-benzoxazin-3-yliden)malononitrile 10 was allowed to react with ethyl thioglycolate, aniline or benzylamine to yield thiopyrano-1
摘要 4-Methyl-3,4-dihydro-2H-1,4-benzoxazin-3-one 1 与 CS 2 和卤代化合物反应得到 thieno-1,4-benzoxazines 2a , b 和 2-(1,3- dithiol-2-yliden)-1,4-benzoxazines 3a, b 分别。化合物 1 与氰基烯酮 S,S 二缩醛反应得到吡喃-1,4-苯并恶嗪衍生物 4、5。用 1:2 摩尔比的溴处理化合物 1 得到 2,2-二溴衍生物 6 。化合物 6 与双齿化合物或 CS 2 和反应性亚甲基反应,分别得到相应的螺环化合物 7a-f 和 8a-d。使 2-(2-Bromo-4-methyl-3,4-dihydro-2H-1,4-benzoxazin-3-yliden)丙二腈 10 与巯基乙酸乙酯、苯胺或苄胺反应,得到 thiopyrano-1,4-苯并恶嗪 11 或吡咯并-1