1-Cyclopropyl-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid → 1-Cyclopropyl-6,8-difluoro-7-[3-(4-phenyl-1,2,3-triazol-1-yl)pyrrolidin-1-yl]-1,4-dihydro-4-oxoquinoline-3-carboxylic acid

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Reaction Conditions

Reaction Steps

A mixture of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid (150 mg, 0.53 mmol), 3-(4-phenyl-1,2,3-triazol-1-yl)pyrrolidine hydrochloride (252 mg, 1.05 mmol) and diazobicycloundecane (160 mg, 1.05 mmol) in pyridine (5 ml) was heated at 110° C. for 20 hrs, concentrated and diluted with water. The separated solid was filtered, washed with water and crystallized from methanol. Yield: 55 mg (22.3%), m.p. 241.4° C. 1H NMR (TFA) δ: 1.34-1.73 (m, 4H), 2.82-3.09 (m, 2H), 4.20-4.95 (m, 5H), 5.73-5.92 (m, 1H), 7.5-7.92 (m, 4H), 8.15 (d, 1H), 8.80 (s, 1H), 9.30 (s, 1H).

Provenance & Evidence