乙酰氯 、 、
2,3-dihydro-3,3-dimethyl-2-hydroxybenzofuran-5-yl-dimethylaminosulfonate 、
三乙胺 以
乙醚 为溶剂,
以the compound 2,3-dihydro-3,3-dimethyl-2-methylcarbonyloxybenzofuran-5-yl dimethylaminosulfonate being obtained in the form of crystals的产率得到2,3-dihydro-3,3-dimethyl-2-methylcarbonyloxybenzofuran-5-yl dimethylaminosulfonate