A NOVEL SYNTHESIS OF 2-SUBSTITUTED-4H-THIENO [2,3-<i>d</i>][1,3] OXAZIN-4-ONE AND 2,3-DISUBSTITUTED THIENO [2,3-<i>d</i>]PYRIMIDIN-4(3H)-ONE DERIVATIVES
作者:A.-A. S. El-Ahl
DOI:10.1080/10426500008045003
日期:2000.1
compound 5 has two functional groups i.e. active methylene and acid anhydride which are suitably located for intramolecular transformation. Thermal and/or base catalyzed intramolecular cyclization of 5 afforded 2-(4-acetoxy-(hydroxyl)-2-methyl-5,6,7,8-tetrahydrobenzo[4,5] thieno[2,3-b]pyridin-3-yl)-5,6,7,8- tetrahydro-4H-benzo[4,5]thieno[2,3-d] [1,3]oxazin-4-one 10 and 9 respectively. Treatment of 5
5]thieno[2,3-d] [1,3]oxazin-4-one 分别为 10 和 9。用水合肼、芳香族和/或杂环胺处理 5 诱导了相同的分子内环化,同时伴随恶嗪-嘧啶互变得到 3-氨基(芳基或杂基)-2-(4-羟基-5,6,7,8) -四氢苯并-[4,5]噻吩并[2,3-b]吡啶-3-基)-3,4,5,6,7,8-六氢苯并[4,5]噻吩并[2,3-d]嘧啶11-14 分 4 合。