3-(2-{(S)-2-(Butane-1-sulfonylamino)-3-[4-(3-piperidin-4-yl-propoxy)-phenyl]-propionyloxy}-4,6-dimethoxy-phenyl)-3-methyl-butyric acid 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 20.0h,
以9%的产率得到N-[(13S)-6,8-dimethoxy-4,4-dimethyl-2,12-dioxo-11,19-dioxa-1-azatetracyclo[21.2.2.215,18.05,10]nonacosa-5(10),6,8,15(29),16,18(28)-hexaen-13-yl]butane-1-sulfonamide