Potassium Phosphate, Tribasic → HCID 57709130, compound

Participants

Reaction Conditions

Reaction Steps

(4-Bromo-phenyl)acetic acid methyl ester (Tetrahedron Letters 44 (2003) 331-334; 27 mg, 0.118 mmol), palladium acetate (1.8 mg, 0.008 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxy-1,1′-biphenyl (6.6 mg, 0.016 mmol), potassium phosphate (50 mg, 0.234 mmol) and water (0.2 mL) were added to a solution of 2-(4-{1-ethyl-1-[4-(3-ethyl-3-trimethylsilanyloxy-1-pentynyl)-3-methyl-phenyl]-propyl}-2-methyl-phenyl)-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (Example 125-(3); 44 mg, 0.078 mmol) in toluene (2 mL). After replacement with nitrogen, the mixture was stirred at 100° C. for one hour. The reaction mixture was then poured into a saturated aqueous sodium bicarbonate solution, followed by extraction with dichloromethane. The organic layer was dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (hexane:ethyl acetate=2:1) to give the target compound as a colorless oil (19.3 mg, 42%).

Provenance & Evidence