Acetic Acid → HCID 86756020, compound

Participants

Reaction Steps

To a solution of 4-amino-6-methoxy-2-methyl-3,4-dihydro-2H-quinoline-1,7-dicarboxylic acid 1-ethyl ester 7-methyl ester (208 mg, 0.64 mmol) in anhydrous 1,2-dichloroethane (5 mL) was added acetic acid (0.041 mL, 0.71 mmol), followed by 3,5-bis(trifluoromethyl)benzaldehyde (172 mg, 0.71 mmol) and sodium triacetoxyborohydride (0.205 g, 0.97 mmol). The reaction was stirred at room temperature for 2 h. The reaction mixture was partitioned between dichloromethane (45 ml) and water (100 ml) and the aqueous phase was adjusted to pH 9. The aqueous phase was extracted with dichloromethane (3×10 mL). The combined extracts were dried over magnesium sulfate, filtered and concentrated in vacuo. Purification by silica gel chromatography using 20% acetone/hexanes as eluent afforded the title product (337 mg, 95%). MS m/z 567 (M+ +NH4); 1H NMR (CDCl3) δ 1.40 (d, 3H), 7.14 (s, 1H).

Provenance & Evidence