4-[2-ethoxy-2-(2,2,2-trichloro-ethoxycarbonyl)-ethyl]-benzoic acid 、
4-(hydroxymethyl)phenyl methanesulfonate 、
3-{3-benzyl-4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-acetoxy]-phenyl}-2-ethoxy-propionic acid benzyl ester 在
4-[2-ethoxy-2-(2,2,2-trichloro-ethoxycarbonyl)-ethyl]-benzoic acid 4-methanesulfonyloxy-benzyl ester 、 crude product 作用下,
以to afford the title compound as a solid (0.023, 47%)的产率得到4-[2-ethoxy-2-(2,2,2-trichloro-ethoxycarbonyl)-ethyl]-benzoic acid 4-methanesulfonyloxy-benzyl ester