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The mixt. of lithium diisopropylamide and potassium tert-butoxide (LIDA-KOR reagent) is a powerful base which can be advantageously employed for the regioselective deprotonation of fluoropyridines and, in particular, 3-fluoroquinoline. A novel cyclization process was elaborated for the prepn. of the latter product. [on SciFinder (R)]