2-Methyl-2-[2-(4-nitro-phenoxy)-phenoxy]-propionic Acid Methyl Ester 、
sodium hydroxide 在
silica gel 、
methanol-dichloromethane 作用下,
以
tetrahydrofuran methanol 为溶剂,
反应 2.5h,
以gave 433B (4.38 g, 91%) as a light yellow solid的产率得到2-methyl-2-[2-(4-nitro-phenoxy)-phenoxy]-propionic acid