ethyl (9R,14S,17R,25S,E)-9,17,25-tribenzyl-14-isobutyl-2,2,6,6,22,22-hexamethyl-4,7,12,15,20,23-hexaoxo-3-oxa-5,8,13,16,21,24-hexaazaoctacos-26-en-28-oate 在
palladium on carbon 、
氢气 作用下,
以
乙醇 为溶剂,
反应 6.0h,
以97%的产率得到ethyl (9R,14S,17R,25R)-9,17,25-tribenzyl-14-isobutyl-2,2,6,6,22,22-hexamethyl-4,7,12,15,20,23-hexaoxo-3-oxa-5,8,13,16,21,24-hexaazaoctacosan-28-oate