A novel and efficient route for the synthesis of 5-nitrobenzo[d]oxazole derivatives
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Add time:08/14/2019 Source:sciencedirect.com
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 °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.
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