Triethylamine → 1-Cyclopentylethyl-6-quinolin-5-YL-1,3-dihydro-imidazo[4,5-B]pyrazin-2-one

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1-Cyclopentylmethyl-6-quinolin-5-yl-1,3-dihydro-imidazo[4,5-b]pyrazin-2-one. A solution of N-bis-boc-3-bromo-5-(quinoline-5-yl)-pyrazin-2-ylamine (150 mg, 0.29 mmol), cyclopentylmethylamine hydrochloride (268 mg, 2 mmol), and triethylamine in ethanol (4 mL) was reacted and purified according to General Procedure E2 to give 25 mg (36% yield) of white solid. 1H NMR (300 MHz, DMSO-d6) δ 8.96 (dd, J=4.1, 1.6, 1H), 8.54-8.61 (m, 2H), 8.12 (d, J=8.2, 1H), 7.77-7.90 (m, 2H), 7.47-7.59 (m, 2H), 3.11-3.19 (m, 2H), 1.98-2.12 (m, 1H), 1.67-1.77 (m, 2H), 1.49-1.65 (m, 4H), 1.15-1.30 (m, 2H); MS (ESI) m/z 346.4 [M+1]+.

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