Cyclohexanecarboxylic acid → N-[1-(cyclohexylcarbonyl)piperidin-4-yl]-4-phenylquinazolin-2-amine

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Reaction Steps

To a solution of 4-phenyl-N-(piperidine-4-yl)quinazolin-2-amine (0.34 g, 1.0 mmol), cyclohexanecarboxylic acid (0.15 g, 1.2 mmol), and triethylamine (1.38 mL, 10 mmol) in dimethylformamide (15 mL) was added O-(7-azabenzotriazol-1-yloxy)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HATU, 0.57 g, 1.5 mmol) and the solution was stirred at rt for 16 h. An aqueous 5% solution of lithium chloride (100 mL) was added and the resulting solid was filtered and recrystallized in methanol/methyl-tert-butyl ether to yield N-[1-(cyclohexylcarbonyl)piperidin-4-yl]-4-phenylquinazolin-2-amine (0.32 g, 77%) as a yellow solid. 1H NMR (400 MHz, CDCl3): δ 11.81 (d, 1H), 7.70-7.65 (m, 4H), 7.56-7.53 (m, 3H), 7.21-7.16 (m, 1H), 5.26 (d, 1H), 4.52 (m, 1H), 4.34-4.28 (m, 1H), 3.92 (m, 1H), 3.28 (t, 1H), 2.94 (t, 1H), 2.51 (tt, 2H), 2.29-2.16 (m, 2H), 1.83-1.69 (m, 5H), 1.57-1.44 (m, 4H), 1.30-1.26 (m, 2H). MS (EI) for C26H30N4O: 415.3 (MH+).

Provenance & Evidence