Potassium Phosphate, Tribasic → HCID 57709156, compound

Participants

Reaction Conditions

Reaction Steps

Degassed N,N-dimethylformamide (0.26 mL) was added to t-butyl-(1-{2-[4-(1-ethyl-1-{4-[4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl]-3-methyl-phenyl}-propyl)-2-methyl-phenyl]-ethyl}-2,2-dimethyl-propoxy)dimethylsilane (Example 24-(1); 22.4 mg, 0.0343 mmol), 4-bromo-phenyl-hydroxy-acetic acid methyl ester (Example 154-(1); 10.5 mg, 0.0428 mmol), tetrakis(triphenylphosphine)palladium (0) (6.2 mg, 0.0054 mmol) and potassium phosphate (14.1 mg, 0.0664 mmol). After replacement with nitrogen, the mixture was heated while stirring at an external temperature of 86 to 96° C. for five hours. Water was added to the reaction mixture, followed by extraction with diethyl ether. The extract was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel chromatography (hexane/ethyl acetate=7/1) to give the title compound (7.0 mg, 32%).

Provenance & Evidence