Hydrogen Bromide → HCID 18008905, compound

Participants

Reaction Steps

To a solution of ethyl 6-chloro-3-ethoxy-7-(4-(((4-ethoxycarbonylphenyl)carbamoyloxy)methyl)imidazole-1-yl)quinoxaline-2-carboxylate (64.0 mg, 113 μmol) in acetic acid (3 ml) was added 47% hydrobromic acid (0.3 ml), and the mixture was stirred for 3 hours at room temperature. After allowed to stand overnight, the mixture was stirred for 1 hour at 40° C. After cooling, ethanol was added to the residue obtained by concentrating the reaction mixture under reduced pressure. The precipitated crystals were collected by filtration and air-dried, thereby obtaining 18.8 mg of title compound as brown powder. The residue obtained by concentrating the filtrate under reduced pressure was washed with water and air-dried, thereby obtaining additional 37.4 mg. Total yield 56.2 mg. Yield 97%.

Provenance & Evidence