Water → Ammonia

Participants

Reaction Conditions

Reaction Steps

A mixture of benzyl {[trans-4-(8-amino-1-iodoimidazo[1,5-a]pyrazin-3-yl)cyclohexyl]methyl}carbamate (1.00 g, 0.00180 mol), 1-(tert-butoxycarbonyl)-1H-indole-2-boronic acid (0.517 g, 0.00198 mol), 1,2-dimethoxyethane (7.7 mL), water (1.4 mL, 0.081 mol) and Cesium Carbonate (1.17 g, 0.00360 mol) degassed three times, treated with tetrakis (triphenylphosphine)palladium(0) (200 mg, 0.0002 mol) and degassed once more. The resulting mixture was heated at 100° C. overnight before being diluted with EtOAc (40 mL), washed with water (2×30 ml) and brine (20 ml) then dried over Na2SO4 and concentrated in vacuo. The crude product thus isolated was chromatographed over silica gel eluting with hexane→EtOAc:hexane:5% 2M NH3 in MeOH 1:1:0.05 to afford the title compound. 1H NMR (400 MHz, CDCl3): δ 1.13-1.22 (m, 2H), 1.75-1.86 (m, 2H), 1.94-1.97 (m, 2H), 2.11-2.13 (m, 2H), 2.86 (m, 1H), 3.12-3.16 (m, 2H), 4.82 (m, 1H), 5.12 (s, 2H), 5.69 (br, 2H), 6.78 (s, 1H), 7.13-7.15 (m, 2H), 7.19-7.25 (m, 2H), 732-7.38 (m, 5H), 7.42 (d, J=8.0 Hz, 1H), 7.64 (d, J=8.4 Hz, 1H), 9.09 (br, 1H). MS (ES+): m/z 495 [MH+].

Provenance & Evidence