Ethyl (E)-6-(4-methoxyethoxymethoxy-1,3-dihydro-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-2-amino-4-methyl-4-hexenoate 、
三乙胺 、
甲基磺酰氯 在
水 、
Sodium sulfate-III 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以giving 368 mg (82%) of ethyl (E)-6-(4-hydroxy-1,3-dihydro-6-methoxy-7-methyl-3-oxoisobenzofuran-5yl) -2-methylsulfonylamino-4-methyl-4-hexenoate as a colorless oil的产率得到ethyl (E) 6-(4-hydroxy-1,3-dihydro-6-methoxy-7-methyl-3-oxoisobenzofuran-5-yl)-2-methylsulfonylamino-4-methyl-4-hexenoate