3-Fluoro-2,3-dihydro-1H-1,4-benzodiazepin-2-ones of the formula <IMAGE> wherein R1 is H, alkyl or fluorinated alkyl of 1-4 carbon atoms and up to 9 fluorine atoms or cycloalkylalkyl of 4-8 carbon atoms; R2 is phenyl; monohalophenyl or pyridyl; R3 is F, Cl, Br or NO2, and physiologically acceptable acid addition salts thereof, are central nervous system depressants.
3-Fluorobenzodiazepines