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With tetrakis(triphenylphosphine) palladium(0); sodium hydrogencarbonate; In N,N-dimethyl acetamide; at 100℃; for 8h;Inert atmosphere;
In a 3 L four-necked flask purged with nitrogen, 148.3 g of 4-pentylphenylboronic acid, 102 g of <strong>[38573-88-5]1-<strong>[38573-88-5]bromo-2,3-difluorobenzene</strong></strong>, 5.56 g of tetrakistriphenylphosphine palladium (0) complex and 270 g of hydrogen carbonate Sodium and 750 ml of N, N-dimethylacetamide were added, and the mixture was stirred at 100 ° C. for 8 hours. The completion of the reaction was confirmed with a gas chromatograph (GC), and the system was cooled to room temperature. 1 L of water was added to the reaction system and stirring was carried out, 1 L of heptane was added thereto, and the mixture was vigorously stirred. The organic layer was separated and then extracted twice with 1 L of heptane. After washing the obtained heptane solution twice with 300 ml of water, the solvent was distilled off, and purification was carried out using 250 g of silica gel using heptane as a solvent, to obtain 100 g of the desired product as a colorless transparent liquid . Yield 72.8percent. GC purity 97.7percent. M + 260.