Water → N-(4-Chlorobenzyl)-2-(((2-hydroxy-2-quinolin-2-ylethyl)(methyl)amino)methyl)-7-methyl-4-oxo-4,7-dihydrofuro[2,3-b]pyridine-5-carboxamide

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N,N-biisopropylethylamine (0.11 mL) and rac-2-(methylamino)-1-quinolin-2-ylethanol (Preparation 47, 0.125 g) were added to a suspension of N-(4-chlorobenzyl)-2-(chloromethyl)-7-methyl-4-oxo-4,7-dihydrofuro[2,3-b]pyridine-5-carboxamide (Example 2, 0.150 g) in DMF (10 mL). The reaction mixture was heated to 90° C. for 1 h. The reaction mixture was allowed to cool to room temperature, poured into water (25 mL), and was extracted with CH2Cl2 (4×25 mL). The combined organic layers were dried (MgSO4), filtered, and concentrated in vacuo. The resulting solid was purified by column chromatography (CH2Cl2/methanol; 99/1, 98/2, 97/3, 9515). The product was then recrystallized from ethyl acetate and then methanol to yield 0.106 g of the title compound as a pale yellow solid. Physical characteristics. M.p. 154-159° C. (dec); 1H NMR (400 MHz, DMSO-d6) δ 10.64, 8.48, 8.29-8.27, 7.94-7.87, 7.70-7.66, 7.62-7.60, 7.57-7.52, 7.41-7.33, 6.85, 5.53, 4.95-4.91, 4.55, 3.74, 3.74-3.72, 2.89-2.85, 2.79-2.74, 2.36; MS (ESI+) m/z 531 (M+H)+.

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