Water → 6,6-dimethyl-2-(6-(6-methylpyridin-3-yl)-2,3-dihydrobenzo[b][1,4]oxazin-4-yl)-6,7-dihydrothiazolo[5,4-c]pyridin-4(5H)-one

Participants

Reaction Steps

A stirred solution of Example 39 (0.090 g, 0.23 mmol), 2-methylpyridine-5-boronic acid (0.094 g, 0.69 mmol), Na2CO3 (0.073 g, 0.69 mmol) and tetrakis-(triphenylphosphine)palladium(0) (0.026 g, 0.02 mmol) in THF (3 mL) was heated to 160° C. under microwave irradiation for 30 minutes. After cooling to r.t., water (10 mL) was added and the resulting precipitate filtered off, washed with water (3×20 mL) and dried in vacuo. The solid was then triturated with EtOAc (3×20 mL) and DCM (2×20 mL), then concentrated in vacuo to give the title compound (0.027 g, 29%) as an off-white solid. δH (CDCl3) 8.71 (1H, d, J 2.3 Hz), 8.22 (1H, d, J 2.1 Hz), 7.75 (1H, dd, J 8.1 and J 2.4 Hz), 7.29 (1H, dd, J 7.9 and J 2.3 Hz), 7.22 (1H, d, J 7.9 Hz), 7.05 (1H, d, J 8.5 Hz), 5.30 (1H, br. s), 4.43-4.37 (2H, m), 4.22-4.16 (2H, m), 2.89 (2H, s), 2.60 (3H, s), 1.40 (6H, s). LCMS (ES+) 407.0 (M+H)+, RT 1.99 minutes (Method 1).

Provenance & Evidence