Reaction Steps
A solution of mixture of trans-4-(2-(butylamino)-5-(4-fluorophenyl)-5H-pyrrolo[3,2-d]pyrimidin-7-yl)cyclohexanol and 4-(2-(butylamino)-5-(4-fluorophenyl)-6,7-dihydro-5H-pyrrolo[3,2-d]pyrimidin-7-yl)cyclohexanol (0.035 g, 0.091 mmol) in 5 mL MeOH was added Pd/C (0.004 g, 10 wt %). The mixture was stirred overnight under air. After filter through a plug of celite, the filtrate was concentrated and purified by ISCO to provide cis-4-(2-(butylamino)-5-(4-fluorophenyl)-5H-pyrrolo[3,2-d]pyrimidin-7-yl)cyclohexanol (0.010 g, 13% over 3 steps) and trans-4-(2-(butylamino)-5-(4-fluorophenyl)-5H-pyrrolo[3,2-d]pyrimidin-7-yl)cyclohexanol (0.012 g+0.040 g, 52% over 3 steps). Cis-isomer (UNC1861A): 1H NMR (400 MHz, CD3OD) δ 8.47 (s, 1H), 7.55-7.49 (m, 3H), 7.32-7.25 (m, 2H), 4.06-3.99 (m, 1H), 3.43 (t, J=7.1 Hz, 2H), 2.97 (tt, J=10.6, 3.7 Hz, 1H), 2.06-1.96 (m, 2H), 1.93-1.82 (m, 4H), 1.79-1.68 (m, 2H), 1.68-1.59 (m, 2H), 1.49-1.39 (m, 2H), 0.97 (t, J=7.4 Hz, 3H); MS m/z 383.3 [M+H]+. Trans-isomer (UNC1860A): 1H NMR (400 MHz, CD3OD) δ 8.45 (s, 1H), 7.53-7.47 (m, 3H), 7.28 (t, J=8.7 Hz, 2H), 3.69-3.57 (m, 1H), 3.42 (t, J=7.1 Hz, 2H), 2.83 (tt, J=12.4, 3.2 Hz 1H), 2.20-2.13 (m, 2H), 2.11-2.02 (m, 2H), 1.73-1.58 (m, 4H), 1.53-1.39 (m, 4H), 0.98 (t, J=7.4 Hz, 3H); MS m/z 383.3 [M+H]+.
