Electrochemical oxidation of aldehyde-N-arylhydrazones into symmetrical-2,5-disubstituted-1,3,4-oxadiazoles
作者:Sushma Singh、Laxmi K. Sharma、Apoorv Saraswat、Ibadur R. Siddiqui、Rana K. Pal Singh
DOI:10.1007/s11164-012-1013-z
日期:2014.3
A convenient, efficient and one-pot synthesis of chemically and pharmaceutically interesting symmetrical-2,5-disubstituted-1,3,4-oxadiazoles is reported. The protocol involves anodic oxidation of aldehyde-N-arylhydrazones in anhyd. MeCN–LiClO4. Constant potential electrolysis carried out in an undivided cell and platinum electrodes leads to the formation of the corresponding oxadiazoles under ambient condition and the mechanism was deduced from voltammetry studies. The reaction proceeded smoothly with high atom economy.
and emission intensity, indicating the high selectivity of the sensor to CN−. The absorption spectra detection limit of the chemosensor for cyanide was 8.34 × 10−7 M and the fluorescence spectra detection limit was 2.85 × 10−8 M. The cyanide test strips based on the chemosensor could serve as a convenient cyanide test kit. Furthermore, the chemosensor was successfully applied to the detection of cyanide