Potassium Phosphate, Tribasic → [5-(4-{1-ethyl-1-[4-(3-ethyl-3-hydroxy-pentyl)-3-methyl-phenyl]-propyl}-2-methyl-phenyl)-pyridin-3-yl]-acetic Acid Methyl Ester

Participants

Reaction Conditions

Reaction Steps

Degassed N,N-dimethylformamide (0.37 mL) was added to 3-ethyl-1-(4-{1-ethyl-1-[3-methyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-propyl}-2-methyl-phenyl)-pentan-3-ol (Example 29; 30.6 mg, 0.0621 mmol), (5-bromo-pyridin-3-yl)acetic acid methyl ester (Example 24-(2); 21.1 mg, 0.0917 mmol), tetrakis(triphenylphosphine)palladium (0) (9.0 mg, 0.0078 mmol) and potassium phosphate (29.4 mg, 0.138 mmol). After replacement with nitrogen, the mixture was heated while stirring at an external temperature of 85 to 94° C. for three 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=1/1) to give the title compound (29.5 mg, 92%).

Provenance & Evidence