Phosphono-substituted isoindolines and indoles from 2,3- and 2,4-benzoxazin-1-ones
作者:Wafaa M. Abdou、Azza A. Kamel、Maha D. Khidre
DOI:10.1002/hc.10216
日期:——
3-benzoxazinone 1 and 2,4-benzoxazinone 2, with trialkyl phosphites 3a–c provide access to new phosphono-substituted isoindolines 6a–f and indoles 19a–e, respectively. Phosphono-substituted 2,3-benzoxazines 5a–c were also obtained in the first reaction. Bisisoindolinylidene (7) was, however, isolated in low yields when 1 was heated with triethyl or triisopropyl phosphite at 100deg;C whereas at 170deg;C 7 was obtained
2,3-苯并嗪酮 1 和 2,4-苯并嗪酮 2 与亚磷酸三烷基酯 3a-c 的反应分别提供了新的膦酰基取代的异吲哚啉 6a-f 和吲哚 19a-e。在第一反应中也得到了膦酰基取代的 2,3-苯并恶嗪 5a-c。然而,当 1 与亚磷酸三乙酯或三异丙酯一起在 100 摄氏度下加热时,双异吲哚亚基 (7) 以低产率分离,而在 170 摄氏度下,7 作为主要产物得到 (~53%)。另一方面,1 或 2 与膦酸二烷基酯 4a-c 的反应在 NaOH(5%)水溶液存在下进行,得到相应的烷基化产物 14a-c 或 20a-c。© 2003 Wiley Periodicals, Inc. 15:77–84, 2004; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/.10216