N-dimethylcarbamoylmethoxy-2-(2,2-dimethyl-5-oxo-[1,3]-dioxolan-4-ylidene)-N-(4-fluorobenzyl)-acetamide 在
3-[(4-Fluoro-benzyl)-methoxy-carbamoyl]-2-hydroxy-acrylic acid methyl ester 作用下,
以
甲醇 为溶剂,
以gave the title ester as white crystals (54% yield)的产率得到3-[Dimethylcarbamoylmethoxy-(4-fluorobenzyl)-carbamoyl]-2-hydroxy-acrylic acid methyl ester