11-[N-acetyl-(dl)-leucyl]amino-23-benzotriazolyloxycarbonyl-25,27-dihydroxy-26,28-dipropoxycalix[4]arene 、
甘胺酸甲酯 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以31%的产率得到Methyl 2-[[17-[(2-acetamido-4-methylpentanoyl)amino]-26,28-dihydroxy-25,27-dipropoxypentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9(27),10,12,15(26),16,18,21,23-dodecaene-5-carbonyl]amino]acetate