Sodium Carbonate → 7-Methyl-5-(3-methylsulfonylphenyl) imidazo[1,5-a]pyrazin-8-one

Participants

Reaction Steps

A solution of compound from Example 129, step 1 (80 mg, 0.35 mmol), (3-methylsulfonylphenyl)boronic acid (77 mg, 0.6 mmol), Na2CO3 (106 mg, 1 mmol), Pd(PPh3)2Cl2 (30.0 mg) in dioxane (3 mL) and water (0.5 mL) was stirred at 120° C. for 18 h under N2. After cooling to room temperature, the mixture was filtered, concentrated and purified by prep-HPLC to give the title compound (20.0 mg, 20%). 1H NMR (Methanol-d4 400 MHz): δ 8.70-8.65 (m, 1H), 8.30-8.20 (m, 2H), 8.16 (d, J=8.0 Hz, 1H), 8.05 (d, J=8.0 Hz, 1H), 7.88 (t, J=8.0 Hz, 1H), 7.22 (s, 1H), 3.56 (s, 3H), 3.24 (s, 3H). LCMS (M+H)+304.

Provenance & Evidence