{2-[2-(2-hydroxy-phenylazo)-phenoxy]-acetylamino}-acetic acid benzhydryl ester 、 2-{2-[2-(2-bromo-acetylamino)-acetylamino]-acetylamino}-3-phenyl-propionic acid benzyl ester 在
caesium carbonate 作用下,
以
乙腈 为溶剂,
反应 8.0h,
以60%的产率得到2-(2-{2-[2-(2-{2-[(benzhydryloxycarbonylmethyl-carbamoyl)-methoxy]-phenylazo}-phenoxy)-acetylamino]-acetylamino}-acetylamino)-3-phenyl-propionic acid benzyl ester