A series of 2 amimo 3 cyano 7,7 dimethyl 4 aryl 5 oxo 5,6,7,8 tetra 4H chromenes were synthesized in the absence of catalyst. Their structures were determined by IR, 1H NMR, and single crystal X ray diffraction.
The halogen substituted anthranilic acid(1) was condensed with acetic anhydride to give halogen substituted 3 methyl 1H 2,4 benoxazin 1 one(2), which was further condensed with hydrazide (3) to give twelve novel halog...The halogen substituted anthranilic acid(1) was condensed with acetic anhydride to give halogen substituted 3 methyl 1H 2,4 benoxazin 1 one(2), which was further condensed with hydrazide (3) to give twelve novel halogen substituted 2 (3 methyl 5 substitued 4H 1,2,4 triazol 4 yl) benzoic acid. All compounds synthesized were identified by 1H NMR and elemental analyses.展开更多
通过水代替有机溶剂来提纯2-丙基-4,5-1 H-咪唑二羧酸二乙酯和4-(1-羟基-1-甲基乙基)-2-丙基-1 H-咪唑-5-羧酸乙酯的新方法,使得改进工艺更加绿色简便。采用1 H NMR、13 C NMR、IR、MS谱图对反应后的产品和未知杂质进行结构鉴定,确证为...通过水代替有机溶剂来提纯2-丙基-4,5-1 H-咪唑二羧酸二乙酯和4-(1-羟基-1-甲基乙基)-2-丙基-1 H-咪唑-5-羧酸乙酯的新方法,使得改进工艺更加绿色简便。采用1 H NMR、13 C NMR、IR、MS谱图对反应后的产品和未知杂质进行结构鉴定,确证为一水合4-(1-羟基-1-甲基乙基)-2-丙基-1 H-咪唑-5-羧酸乙酯和4-乙酰基-2-丙基-1 H-咪唑-5-羧酸乙酯。对反应的可能机理进行初步研究。展开更多
文摘A series of 2 amimo 3 cyano 7,7 dimethyl 4 aryl 5 oxo 5,6,7,8 tetra 4H chromenes were synthesized in the absence of catalyst. Their structures were determined by IR, 1H NMR, and single crystal X ray diffraction.
文摘The halogen substituted anthranilic acid(1) was condensed with acetic anhydride to give halogen substituted 3 methyl 1H 2,4 benoxazin 1 one(2), which was further condensed with hydrazide (3) to give twelve novel halogen substituted 2 (3 methyl 5 substitued 4H 1,2,4 triazol 4 yl) benzoic acid. All compounds synthesized were identified by 1H NMR and elemental analyses.
文摘通过水代替有机溶剂来提纯2-丙基-4,5-1 H-咪唑二羧酸二乙酯和4-(1-羟基-1-甲基乙基)-2-丙基-1 H-咪唑-5-羧酸乙酯的新方法,使得改进工艺更加绿色简便。采用1 H NMR、13 C NMR、IR、MS谱图对反应后的产品和未知杂质进行结构鉴定,确证为一水合4-(1-羟基-1-甲基乙基)-2-丙基-1 H-咪唑-5-羧酸乙酯和4-乙酰基-2-丙基-1 H-咪唑-5-羧酸乙酯。对反应的可能机理进行初步研究。
