(2R,3S)-N1-((25S,37S)-1-amino-25-(4-benzoylbenzyl)-38,38-dimethyl-10,13,24,27,36-pentaoxo-3,6,17,20,29,32-hexaoxa-9,14,23,26,35-pentaazanonatriacontan-37-yl)-N4,3-dihydroxy-2-isobutylsuccinamide 、
D-生物素 在
(1-cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylaminomorpholinocarbenium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基乙酰胺 为溶剂,
以15%的产率得到(2R,3S)-N1-((3S,15S)-15-(4-benzoylbenzyl)-2,2-dimethyl-4,13,16,27,30,41-hexaoxo-45-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)-8,11,20,23,34,37-hexaoxa-5,14,17,26,31,40-hexaazapentatetracontan-3-yl)-N4,3-dihydroxy-2-isobutylsuccinamide