Sodium Carbonate → 6-(4-Methoxyphenyl)naphthalene-2-carboxylic acid

Participants

Reaction Steps

In an 100 mL three-necked RB flask equipped with a magnetic bar, a condenser, and a nitrogen gas inlet, 6-bromo-2-naphthoic acid (2.62 g, 96%, 10 mmol), 4-methoxy-benzeneboronic acid (1.52 g, 10 mmol) and 1-propanol (20 mL) were mixed and stirred at room temperature for about 30 min. Palladium acetate (0.007 g, 0.003 equiv., 0.03 mmol), triphenylphosphine (0.024 g, 0.009 equiv., 0.9 mmol), Na2CO3 solution (2 M, 8 mL, 1.20 equiv., 12 mmol) and water (4 mL) were added and the mixture was refluxed for 2 h. When the mixture was still hot, 20 mL of water was added and the mixture was stirred and cooled to room temperature. The resultant crystals were filtered, washed with water and refluxed with 50 mL of acetic acid for 3-4 h. A white solid was obtained (2.55 g) and recrystallization from acetone gave the title compound as white crystals (2.24 g, 81%): mp 267-269° C.

Provenance & Evidence