1-cyclopropyl-6,7-difluoro-2,3-dihydroquinolin-4-one

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1-Cyclopropyl-6,7-difluoro-1,2,3,4-tetrahydro-4-oxoquinoline(10 g) and p-chloranil (22 g) were reacted in the same method as described in Preparation 1-B to give the white above-indicated compound(8.6 g).

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1-Cyclopropyl-6,7-difluoro-1,4-dihydro-4-oxoquinoline carboxylic acid(20 g) and sodium borohydride(11.5 g) were reacted in the same method as described in Preparation 1-A to give the yellow above-indicated compound(12 g).