Boron tribromide → HCID 10715977, compound

Participants

Reaction Steps

A solution of methyl (R)-7-(3-acetyl-6-methoxy-2,4,5-trimethylphenyl)-7-(4-fluorophenyl)heptanoate (2.0 g, 4.7 mmol) in dichloromethane (10 ml) was added dropwise to boron tribromide (2.0 ml, 5.3 g, 21.0 mmol) in dichloromethane (30 ml) at -78° C. The temperature of the reaction solution was elevated gradually to room temperature, and the reaction solution was stirred for 6 hours at the same temperature. To the reaction solution was was added ice-water at 0° C., and the mixture was extracted with ethyl acetate. The organic layer was washed with water, a saturated aqueous solution of sodium chloride in the order mentioned, and dried over magnesium sulfate. The solvent was distilled off under reduced pressure and the residue was subjected to a silica gel column chromatography to give (R)-7-(3-acetyl-6-hydroxy-2,4,5-trimethylphenyl)-7-(4-fluorophenyl)heptanoic acid (1.56 g). Physico-chemical properties and spectral data are shown in [Table 5].

Provenance & Evidence