N-(4-甲酰基噻唑-2-基)乙酰胺 、 (4-carboxy-2,3-difluorobenzyl)(triphenyl)phosphonium bromide 以to give 4-{2-[2-(acetylamino)-1,3-thiazol-4-yl]vinyl}-2,3-difluorobenzoic acid (1.550 g, 4.778 mmol, yield 76.0%) as a yellow solid的产率得到4-{2-[2-(acetylamino)-1,3-thiazol-4-yl]vinyl}-2,3-difluorobenzoic acid