Studies on dehydro-d-arabino-ascorbic acid 2-arylhydrazone 3-oximes: Conversion into substituted triazoles and isoxazolines
作者:Mohamed Ali El Sekily、Sohila Mancy
DOI:10.1016/0008-6215(83)88358-x
日期:1983.12
4-lactone 2-(arylhydrazones) ( 2 ) were prepared by condensation of dehydro- l -ascorbic acid with various arylhydrazines. Reaction of 2 with hydroxylamine gave the 2-(arylhydrazone) 3-oximes ( 3 ). On boiling with acetic anhydride, 3 gave 2-aryl-4-(2,3-di- O -acetyl- l - threo -glycerol-l-yl)-1,2,3-triazole-5-carboxylic acid 5,4 1 -lactones ( 4 ). On treatment of 4 with liquid ammonia, 2-aryl-4-( l - threo
摘要通过脱氢-1-抗坏血酸与各种芳基肼的缩合反应制得1-苏--2,3-己二酮-1,4-内酯2-(芳基hydr)(2)。2与羟胺反应,得到2-(芳基a)3-肟(3)。与乙酸酐一起沸腾,3得到2-芳基-4-(2,3-二-O-乙酰基-1-苏基-甘油-1-基)-1,2,3-三唑-5-羧酸5, 4 1-内酯(4)。用液氨处理4,得到2-芳基-4-(1-苏-甘油-1-基)-1,2,3-三唑-5-羧酰胺(5)。用乙酸酐-吡啶将5乙酰化得到三乙酸酯,并用沸腾的乙酸酐剧烈乙酰化得到四乙酰基衍生物。5的高碘酸盐氧化得到2-芳基-4-甲酰基-1,2,3-三唑-5-羧酰胺(8),还原后8生成2-芳基-4-(羟甲基)-1,2 ,3-三唑-5-羧酰胺,表征为单乙酸酯和双乙酸酯。2与氢氧化钠的受控反应,然后中和,得到3-(1-苏-甘油-1-基)-4,5-异恶唑啉二酮4-(芳基hydr),其特征在于它们的三乙酸酯。2与H