5,11,17,23-tert-butyl-25,27-bis(chlorocarbonylmethoxy)-26,28-hydroxycalix[4]arene   、                                                                                      
2-[2-[2-[(2S)-2-amino-3-methylbutanoyl]oxyethoxy]ethoxy]ethyl (2S)-2-amino-3-methylbutanoate                                                                                                                                                              在
                                                                                                                                                                                 
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷   、                                                                                         
乙酸乙酯                                                                                  为溶剂,
                                                                                                                                                                                        以15%的产率得到(7S,20S)-28,34,40,45-tetratert-butyl-49,50-dihydroxy-7,20-di(propan-2-yl)-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