The product B (400 mg, 1.04 mmol) or B1, (E)-styrylboronic acid (185 mg, 1.25 mmol), potassium carbonate solution (2.0 M, 4.0 mL) and dried toluene (12 mL) were charged in a two-necked bottle. The bottle was deoxygenated and purged with nitrogen, and the mixture in the bottle was stirred at 60° C. until it was totally dissolved. The nitrogen pressure of the bottle was increased, and Pd(PPh3)4 (120 mg, 0.1 mmol) was rapidly added into the bottle. The reaction was heated to 110° C., and stirred for 48 hours. The resulting was cooled to room temperature to precipitate a solid, and the solid was collected by filtering. The solid was washed by water and methanol, and then sublimated at a temperature of 230° C. to obtain TSP (317 mg, yield=75%) as white solid.
