Methyl 4-(2-hydroxyethoxy)benzoic acid methyl ester 、
sodium;hydride 、
1-氯-2-硝基-4-三氟甲烷磺酰基苯 以afforded 4-[2-(2-nitro-4-trifluoromethanesulfonyl-phenoxy)-ethoxy]-benzoic acid methyl ester的产率得到4-[2-(2-nitro-4-trifluoromethanesulfonyl-phenoxy)-ethoxy]-benzoic acid methyl ester