Ammonia → HCID 67285565, compound

Participants

Reaction Conditions

Reaction Steps

Liquid ammonia (10 mL) was added to 8-chloro-3-((3aS,4S,6aR)-2,2-dimethyl-6-(trityloxymethyl)-4,6a-dihydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)imidazo[1,2-a]pyrazine (1-8) (180 mg, 0.32 mmol, 1 equiv) in isopropanol (10 mL). The resulting solution was placed in a high pressure vessel and heated to 100° C. (pressure did not exceed 600 psi) for 20 h. The resulting amber solution was concentrated, and the residue was purified via reverse phase HPLC (H2O/CH3CN gradient w/0.1% TFA present) to afford 3-((3aS,4S,6aR)-2,2-dimethyl-6-(trityloxymethyl)-4,6a-dihydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)imidazo[1,2-a]pyrazin-8-amine (1-9) as a white solid. 1H NMR (500 MHz, CDCl3) δ 7.7 (d, 1H, J=5.5 Hz), 7.21-7.50 (m, 17H), 6.06 (s, 1H), 5.19 (d, 1H, J=5.5 Hz), 4.66 (d, 1H, J=5.5 Hz), 4.33 (m, 1H), 3.91 (d, 1H, J=14 Hz), 3.83 (d, 1H, J=14 Hz), 1.43 (s, 3H), 1.33 (s, 3H). LRMS m/z (M+H) 544.9 found, 545.2 required.

Provenance & Evidence