1,8-Diazabicyclo(5.4.0)undec-7-ene → 1-Cyclopropyl-6,8-difluoro-7-[3-(1,2,3-triazol-1-yl)pyrrolidin-1-yl]-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid

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Reaction Conditions

Reaction Steps

A mixture of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-quinoline-3-carboxylic acid (138.5 mg, 0.486 mmol), DBU (190 mg, 1.25 mmol), and 3-(1,2,3-triazol-1-yl)pyrrolidine hydrochloride (216 mg, 1.25 mmol) in pyridine (8 ml) was heated for 20 h at 7580° C. and then pyridine was removed under vacuum. The residue was diluted with acetonitrile. The precipitated solid was washed with acetonitrile, ether and dried at 40° C. Yield: 65 mg (33%), m.p. 244°-246° C. (dec). 1H NMR (TFA) δ: 1.5 (m, 4H), 2.8 (m, 2H), 4.5 (m, 4H), 4.75 (bs, 1H), 5.8 (bs, 1H), 8.15 (d, 1H), 8.6 (s, 1H), 8.7 (s, 1H), 9.25 (s, 1H).

Provenance & Evidence