5,11,17,23-tert-butyl-25,27-bis(chlorocarbonylmethoxy)-26,28-hydroxycalix[4]arene 、
2-[2-[2-[2-[(2S)-2-amino-3-phenylpropanoyl]oxyethoxy]ethoxy]ethoxy]ethyl (2S)-2-amino-3-phenylpropanoate 在
三乙胺 作用下,
以
二氯甲烷 、
乙酸乙酯 为溶剂,
以17%的产率得到(7S,23S)-7,23-dibenzyl-31,37,43,48-tetratert-butyl-52,53-dihydroxy-3,9,12,15,18,21,27-heptaoxa-6,24-diazahexacyclo[27.15.7.135,39.146,50.02,41.028,33]tripentaconta-1,28,30,32,35(53),36,38,41,43,46,48,50(52)-dodecaene-5,8,22,25-tetrone