1,2,5-Thiadiazole 2-oxides: selective synthesis, structural characterization, and electrochemical properties
作者:Lidia S. Konstantinova、Ekaterina A. Knyazeva、Natalia V. Obruchnikova、Nadezhda V. Vasilieva、Irina G. Irtegova、Yulia V. Nelyubina、Irina Yu. Bagryanskaya、Leonid A. Shundrin、Zhanna Yu. Sosnovskaya、Andrey V. Zibarev、Oleg A. Rakitin
DOI:10.1016/j.tet.2014.06.096
日期:2014.9
5-thiadiazole 2-oxides (including fused derivatives) 8a,b,c,g,h from the reaction of vic-glyoximes with S2Cl2 and pyridine in acetonitrile was elaborated together with general procedure for the synthesis of 1,2,5-thiadiazoles 7a–i, 10, 12, and 14 from the same starting materials and reagents. Molecular structures of 3,4-dimethyl-1,2,5-thiadiazole 2-oxide 8a and [1,2,5]thiadiazolo[3,4-b]quinoxaline 10 were confirmed
为1,2,5-噻二唑-2-氧化物(包括稠合的衍生物)的选择性合成一个新的通用方法图8a,b,c ^,克,ħ从反应VIC -glyoximes带S 2氯2和吡啶的乙腈溶液中与1,2,5-噻二唑的合成一般方法一起阐述图7a -我,10,12,和14从相同的原料和试剂。3,4-二甲基-1,2,5-噻二唑2-氧化物8a和[1,2,5]噻二唑[3,4- b ]的分子结构通过单晶X射线衍射确认了对喹喔啉10。通过循环伏安法研究了1,2,5-噻二唑2-氧化物8的电化学性质,观察到单环和苯并稠合衍生物的行为不同。在化合物8g和17中,通过电化学还原发现了2,1,3-苯并噻二唑1-氧化物的先前未知的脱氧作用,并通过EPR光谱法以自由基阴离子的形式检测到2,1,3-苯并噻二唑7g和19结合DFT计算。