5-((3aR,6S,6aS)-2-oxo-hexahydro-thieno[3,4-d]imidazol-6-yl)-pentanoic acid {5-[2-((6S,7R)-7-amino-8-oxo-6-phenyl-7,8-dihydro-6H-5-oxa-9-aza-benzocyclohepten-9-yl)-acetylamino]-pentyl}-amide 、
N-叔丁氧羰基-L-丙氨酸 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
二氯甲烷 为溶剂,
反应 7.0h,
以97%的产率得到{(S)-1-[(6S,7R)-8-oxo-9-({5-[5-((3aR,6S,6aS)-2-oxo-hexahydro-thieno[3,4-d]imidazol-6-yl)-pentanoylamino]-pentylcarbamoyl}-methyl)-6-phenyl-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylcarbamoyl]-ethyl}-carbamic acid tert-butyl ester