5,11,17,23-tert-butyl-25,27-bis(chlorocarbonylmethoxy)-26,28-hydroxycalix[4]arene 、
(S)-2-Amino-3-phenyl-propionic acid 2-{2-[2-((S)-2-amino-3-phenyl-propionyloxy)-ethoxy]-ethoxy}-ethyl ester 在
三乙胺 作用下,
以
二氯甲烷 、
乙酸乙酯 为溶剂,
以12%的产率得到(7S,20S)-7,20-dibenzyl-28,34,40,45-tetratert-butyl-49,50-dihydroxy-3,9,12,15,18,24-hexaoxa-6,21-diazahexacyclo[24.15.7.132,36.143,47.02,38.025,30]pentaconta-1,25,27,29,32(50),33,35,38,40,43,45,47(49)-dodecaene-5,8,19,22-tetrone