(+/-)-(7-bromo-5-fluoro-2,3-dihydro-1-benzofuran-2-yl)methanol 、
对甲苯磺酰氯 、 (+/-)-[7-chloro-4-(trifluoromethyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate 以gave 12.50 g (66%) (±)-(7-bromo-5-fluoro-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate as a white solid的产率得到(7-bromo-5-fluoro-2,3-dihydrobenzofuran-2-yl)methyl-4-methylbenzenesulfonate