反应详情

A mixture of (7S,8aR)-2-benzyloctahydropyrrolo[1,2-a]pyrazin-7-ol (Example 65D, 5 g, 21.52 mmol) and 2,2,2-trifluoroethanol (50 mL) was added to 20% palladium hydroxide on carbon, wet (0.500 g) in a pressure bottle. The mixture was stirred at 50° C. for 16 hours under 30 psi of hydrogen. The mixture was filtered through a nylon membrane to give a crude intermediate (7S,8aR)-octahydropyrrolo[1,2-a]pyrazin-7-ol. The title compound was prepared according to the procedure described in Example 61 substituting (7S,8aR)-octahydropyrrolo[1,2-a]pyrazin-7-ol for (7R,8aS)-octahydropyrrolo[1,2-a]pyrazin-7-ol. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.43-1.63 (m, 2H), 2.10-2.27 (m, 3H), 2.50 (m, 1H), 2.80-3.00 (m, 2H), 3.20-3.50 (m, 2H), 4.22 (m, 1H), 4.42-4.60 (m, 1H), 4.80 (m, 1H), 7.70 (m, 3H), 7.82 (m, 1H); MS (ESI) m/z 315 (M+H)+.

1. filtrationThe mixture was filtered through a nylon membrane