Cesium carbonate → Methyl 3-(3-bromo-4-phenoxyphenyl)propionate

Participants

Reaction Conditions

Reaction Steps

A solution of Intermediate 5 (3.08 g) in anhydrous N-methylpyrrolidone (9.5 ml, WAKO) was successively added with cesium carbonate (3.58 g, WAKO), iodobenzene (1.4 ml, TCI), dipivaloylmethane (0.12 ml, TCI) and copper(I) chloride (275 mg, WAKO), and stirred 120° C. for 16 hours under argon gas atmosphere. The reaction mixture was added with t-butyl methyl ether (25 ml), and insoluble solids were removed by filtration. The filtrate was washed successively with 2 N aqueous hydrochloric acid and saturated brine and dried, and then the solvent was evaporated under reduced pressure. The residue was purified by flash column chromatography (hexane:ethyl acetate=1:10) to obtain the title compound (Compound No. A-31, 1.00 g).

Provenance & Evidence