1-Cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic Acid Ethyl Ester → HCID 54487111, compound

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Reaction Steps

Following the procedure of Step 1 Example 80, starting with 0.750 g (2.4 mmol) of 1-cyclopropyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid ethyl ester and substituting 0.521 g (3.6 mmol) of 9-amino-1,4-dioxa-7-azaspiro[4.4]nonane, from Step 6 Example 208, for the spiro compound of that example, and heating at 40° C. instead of 65° C. for 288 hours instead of 48 hours, the crude product was obtained. The compound was dissolved in methylene chloride which was washed with 2×100 mL of water then dried over anhydrous sodium sulfate, then the solvent was removed by evaporation under vacuum. The product was purified with HPLC, eluting with 60% increasing to 65% methanol/water. The solvent was removed by evaporation under vacuum to afford 0.466 g of the title compound, NMR (CDCl3) d 1.12 (m, 4H), 1.40 (t, 3H, J=7.5 Hz), 3.45 (m, 5H), 3.62 (m, 1H), 3.78 (m, 2H), 3.84 (m, 1H), 3.98 (m, 1H), 4.07 (m, 4H), 4.38 (q, 2H, J=7.5 Hz), 7.83 (dd, 1H, J=15, 1.5 Hz), 8.50 (s, 1H).

Provenance & Evidence