Hydrochloric Acid → HCID 86717545, compound

Participants

Reaction Steps

To a solution of (1R)-1-{1-[(3S)-piperidin-3-yl]-1H-imidazo[4,5-d]thieno[3,2-b]pyridin-2-yl}ethanol hydrochloride (30.0 mg, 0.0885 mmol) (Example 50, step 4) and triethylamine (37.0 μL, 0.266 mmol) in methylene chloride (0. 5 mL) was added 3-(carbomethoxy)propionyl chloride (12.0 μL, 0.0974 mmol). The resulting mixture was stirred at room temperature for 2 h. Water and dichloromethane were added and the layers separated. The organic was concentrated. The crude residue was taken up in methanol (0.5 mL), tetrahydrofuran (50 μL), and water (40 μL). Lithium hydroxide, monohydrate (18 mg, 0.44 mmol) was added and the mixture stirred at room temperature for 3 h. The mixture was made slightly acidic by adding 1N HCl then concentrated. The mixture was dissolved in dichloromethane, stirred, filtered and concentrated to give 37 mg of clean, crude acid. LCMS calculated for C19H23N4O4S (M+H)+: m/z=403.1. Found: 403.2.

Provenance & Evidence