Boron tribromide → HCID 12773913, compound

Participants

Reaction Steps

To a solution of 1-(4-chlorophenoxy)methyl-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline (90 mg) in anhydrous methylene chloride (5 ml) was added boron tribromide (203 mg) at -55° C. under cooling and stirring, and then the reaction temperature was gradually elevated to at 5° C. over 17.5 hours. After the reaction, the reaction mixture was concentrated under reduced pressure. The residue was dissolved in methanol (5 ml) and water (0.5 ml), and the solution was warmed at 60° to 80° C. for 10 minutes and then the solution was concentrated. The amorphous residue was dissolved in acetone, and to the solution was added ether, and the mixture was allowed to stand. The precipitated crystals were collected by filtration and dried to give 1-(4-chlorophenoxy)methyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline hydrobromide (77 mg), mp 232° to 233° C. The product was identified with a sample by I.R. spectrum and N.M.R. spectrum.

Provenance & Evidence