期刊
JOURNAL OF FLUORINE CHEMISTRY
卷 161, 期 -, 页码 83-86出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jfluchem.2014.02.013
关键词
2-Fluoro-5-nitroaniline; 5-Nitrobenzoxazole; Solvent-free conditions; Nucleophilic substitution of fluorine
In this paper, we report a novel and efficient route for the synthesis of 5-nitrobenzoxazole derivatives starting from 2-fluoro-5-nitroaniline and various benzoyl chloride derivatives under solvent-free conditions at 130 degrees C in the presence potassium carbonate. Benzoyl chlorides easily underwent nucleophilic acyl substitution followed by intramolecular cyclization via concomitant removal of fluorine to obtain the title compounds in high yields. (C) 2014 Elsevier B.V. All rights reserved.
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