Efficient, One-Pot Synthesis of Triazolothiadiazinyl-pyrazolone and Pyrazolyl-triazolothiadiazine Derivatives via Multicomponent Reaction
作者:Tewodros Birhanu Aychiluhim、Vedula Rajeswar Rao
DOI:10.1080/00397911.2012.721917
日期:2014.5.19
Abstract A one-pot, multicomponent reaction of 3-(2-bromo acetyl)coumarins, 4-amino-5-hydrazino-4H-[1,2,4]triazole-3-thiol, and different derivatives of ethyl 2-(2-(aryl)hydrazono)-3-oxobutanoates provide an efficient and direct method for the synthesis of 4-(arylydrazono)-3-methyl-1-(6-(coumarin-3-yl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl)-1H-pyrazol-5(4H)-ones (4a–h). A similar methodology
摘要 3-(2-溴乙酰基)香豆素、4-氨基-5-肼基-4H-[1,2,4]三唑-3-硫醇和不同的乙基2-( 2-(芳基)腙)-3-氧代丁酸酯为合成4-(芳基腙)-3-甲基-1-(6-(香豆素-3-基)-7H-[1,2]提供了一种有效而直接的方法,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl)-1H-pyrazol-5(4H)-ones (4a–h)。还开发了一种类似的方法来使用乙酰丙酮、4-氨基-5-肼基-4H-[1,2,4]三唑-3-硫醇和苯甲溴化物的不同衍生物合成吡唑基-三唑噻二嗪(9a-f) . 所得产物通过分析和光谱数据表征。图形概要