Methanol → 6-(4-(3,5-Dichloropyridin-4-ylamino)-7-methoxy-2-oxo-1,2-dihydroquinolin-8-yloxy)hexanoic acid

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Reaction Steps

Lithium hydroxide (2.0 mL, 1M, 2.0 mmol) was added to a solution of ethyl 6-(4-(3,5-dichloropyridin-4-ylamino)-7-methoxy-2-oxo-1,2-dihydroquinolin-8-yloxy)hexanoate (100 mg, 0.20 mmol), methanol (2 mL), and tetrahydrofuran (8 mL). The mixture was stirred for 24 h, quenched with 1N HCl (30 mL), and extracted with ethyl acetate (40 mL×2). The organic extracts were dried, filtered, and concentrated to give 6-(4-(3,5-dichloropyridin-4-ylamino)-7-methoxy-2-oxo-1,2-dihydroquinolin-8-yloxy)hexanoic acid: 1H NMR (400 MHz, DMSO-d6): δ 10.10 (s, 1H), 8.88 (s, 1H), 8.77 (s, 2H), 7.89 (d, 1H), 7.06 (d, 1H), 4.80 (s, 1H), 3.95 (t, 2H), 3.90 (s, 3H), 2.22 (t, 2H), 1.76 (m, 2H), 1.55 (m, 2H), 1.39 (m, 2H); MS (ESI): 465.8.

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