5-(tert-butoxycarbonylaminomethyl)-isophthalic acid bis(2,5-dioxopyrrolidin-1-yl) ester 、 6-amino-2-[bis(benzyloxycarbonylmethylamino)]hexanoic acid benzyl ester ditrifluoroacetate 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 12.0h,
以82%的产率得到6-(3-{5-benzyloxycarbonyl-5-[bis(benzyloxycarbonylmethylamino)]}-5-(tert-butoxycarbonylaminomethyl)benzoylamino)-2-[bis(benzyloxycarbonylmethylamino)]hexanoic acid benzyl ester