Carbon tetrabromide → HCID 57557953, compound

Participants

Reaction Steps

The (4R,5R)-5-hydroxymethyl-2,2-dimethyl-[1,3]dioxolan-4-carboxylic acid [1-oxo-3-(2-trifluoromethylphenyl)-1,2-dihydroisoquinolin-7-yl]amide (1.5 g, 3.24 mmol) obtained in step A was dissolved in an anhydrous methylene chloride solution (30 ml). Thereafter, triphenylphosphine (2.21 g, 8.43 mmol) and carbon tetrabromide (2.80 g, 8.43 mmol) were added to the solution, and the obtained mixture was stirred at a room temperature for 3 hours. Thereafter, the solvent was distilled away. The obtained residue was purified by silica gel column chromatography (methylene chloride:methanol=50:1), so as to obtain (4R,5S)-5-bromomethyl-2,2-dimethyl-[1,3]dioxolan-4-carboxylic acid [1-oxo-3-(2-trifluoromethylphenyl)-1,2-dihydroisoquinolin-7-yl]amide (3.0 g).

Provenance & Evidence