作者:Yung Cheol Kong、Kyongtae Kim
DOI:10.1002/jhet.5570360231
日期:1999.3
the same reaction in a mixture of ethanol and chloroform (1:4) at room temperature gave 3-ethoxycarbamoyl-4-(4-nitrophenyl)-1,2,5-thiadiazole (8a) (24%) as an isolable product. When 3-aroylformamido-4-aryl-1,2,5-thiadiazoles 2 in tetrahydrofuran were treated with various alkoxides in the corresponding alcohols at room temperature, 3-amino-4-aryl- 7, 3-alkoxycarbamoyl-4-aryl- 8, and 3-aryl-4-(aryl)(hydroxy)acetamido-1
除了上次报告,3-(4- nitrobenzoylformamido)-4-(4-硝基苯基)的反应-1,2,5-噻二唑(2A与)米氯过苯甲酸在室温下,在氯仿不进行,而在回流温度下,相同的反应得到4-硝基苯甲酸(5)(86%)和微量的4-硝基苯甲酰基甲酰胺(6)和3-氨基-4-(4-硝基苯基)-1,2,5的混合物-噻二唑(7a)。另一方面,在室温下在乙醇和氯仿(1:4)的混合物中进行相同的反应,得到3-乙氧基氨基甲酰基-4-(4-硝基苯基)-1,2,5-噻二唑(8a)(24%),为可隔离的产品。当3-aroylformamido-4-aryl-1,2,5-thiadiazoles 2时在四氢呋喃中在室温下将相应的醇与各种醇盐处理,3-氨基-4-芳基- 7,3- alkoxycarbamoyl -4-芳基- 8,和3-芳基-4-(芳基)(羟基)乙酰氨基分离出1,2,5-噻二唑9。其比例取决于碱