Synthesis of new heterocycles containing more than one 1,2,3-thia or selenadiazole rings
作者:Mousa Al-Smadi
DOI:10.1002/jhet.5570440427
日期:2007.7
The diketones 2a-d with different alkyl chain length are used for the synthesis of di-1,2,3-thia or selenadiazole derivatives 4a-d and 5a-d. The diketones 2a-d where prepared by a unique method through the reaction between the corresponding dibromoalkanes 1a-d and ethyl acetoacetate, which are transformed into the corresponding semicarbazone derivatives 3a-d. The di-1,2,3-thia or selenadiazole derivatives
具有不同烷基链长的二酮2a-d用于合成二,1,2,3-硫杂或硒代二唑衍生物4a-d和5a-d。通过独特的方法,通过相应的二溴代烷烃1a-d与乙酰乙酸乙酯的反应,制备二酮2a-d,将其转化为相应的半脲酮衍生物3a-d。由亚氨基甲酮衍生物3a-d分别通过分别与亚硫酰氯和二氧化硒的氧化环化反应,由二氨基甲酮衍生物3a-d制备二-1,2,3-硫杂或硒二唑衍生物4a-d和5a-d。