Hydrogen Bromide → HCID 67000344, compound

Participants

Reaction Steps

A 48% aqueous hydrobromic acid solution (170 μL, 2.4 mmol) was added with ice cooling to a solution of the compound (1.00 g, 2.00 mmol) obtained in Example 3 in 2-propanol (10 mL), and the solution was warmed to room temperature and stirred overnight. The resulting precipitate was collected by filtration, then washed with 2-propanol (1 mL×2), and then dried under reduced pressure to obtain a crude crystal of the title compound (797 mg). The crude crystal (750 mg) was added to 2-propanol (30 mL), and the mixture was heated under reflux. The dissolution of the solid matter was confirmed. The solution was then gradually cooled to room temperature, while it was stirred for 19 hours. The resulting precipitate was collected by filtration, then washed with 2-propanol (1 mL×2), and then dried under reduced pressure to obtain the title compound (613 mg) as a white crystalline solid.

Provenance & Evidence