23-benzotriazolyloxycarbonyl-25,27-dihydroxy-11-(N-Cbz-L-leucyl-L-isoleucyl)amino-26,28-dipropoxycalix[4]arene 、
L-valyl-L-phenylalanine methyl ester 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32%的产率得到methyl (2S)-2-[[(2S)-2-[[26,28-dihydroxy-17-[[(2S,3S)-3-methyl-2-[[(2S)-4-methyl-2-(phenylmethoxycarbonylamino)pentanoyl]amino]pentanoyl]amino]-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]-3-methylbutanoyl]amino]-3-phenylpropanoate