Triethylamine → (7R,8aS)-7-[(5-cyclopropylpyrazin-2-yl)oxy]hexahydropyrrolo[1,2-a]-pyrazin-4(1H)-one

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Reaction Steps

To a solution of the product from Example 174F (0.958 g, 2.79 mmol) in methanol (10 mL) was added triethylamine (2.337 mL, 16.77 mmol). The mixture was heated to reflux and stirred for 18 hours. The cooled mixture was concentrated in vacuo, and the crude product was purified by flash chromatography on a 12 g silica gel column, eluting with 2.5% methanol (containing 2 N ammonia) in dichloromethane for 3 minutes and then a gradient to 10% methanol (2 N ammonia) in dichloromethane to afford the title compound. 1H NMR (300 MHz, DMSO-d6) δ ppm 8.15 (dd, J=9.2, 1.4 Hz, 2H), 5.47 (t, J=5.0 Hz, 1H), 4.05-3.88 (m, 1H), 3.87-3.69 (m, 1H), 3.26-3.01 (m, 4H), 2.67 (s, 1H), 2.34 (dd, J=12.7, 10.2 Hz, 1H), 2.24-2.03 (m, 2H), 1.73 (ddd, J=13.3, 11.9, 4.8 Hz, 1H), 1.03-0.88 (m, 2H), 0.82 (ddd, J=6.8, 4.7, 2.4 Hz, 2H); MS (ESI) m/z 449 (M+H)+.

Provenance & Evidence