Cesium carbonate → 4-((S)-2-{[5-Benzyloxycarbonylmethoxy-1-(3-fluoro-phenyl)-1H-pyrazole-3-carbonyl]-amino}-4-tert-butoxycarbonyl-butyryl)-piperazine-1-carboxylic acid ethyl ester

Reaction equation

[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:39])[C@@H:13]([NH:23][C:24]([C:26]2[CH:30]=[C:29]([OH:31])[N:28]([C:32]3[CH:37]=[CH:36][CH:35]=[C:34]([F:38])[CH:33]=3)[N:27]=2)=[O:25])[CH2:14][CH2:15][C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:8][CH2:7]1)=[O:5])[CH3:2].Br[CH2:41][C:42]([O:44][CH2:45][C:46]1[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=1)=[O:43].C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C.C(OCC)(=O)C>[CH2:1]([O:3][C:4]([N:6]1[CH2:11][CH2:10][N:9]([C:12](=[O:39])[C@@H:13]([NH:23][C:24]([C:26]2[CH:30]=[C:29]([O:31][CH2:41][C:42]([O:44][CH2:45][C:46]3[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=3)=[O:43])[N:28]([C:32]3[CH:37]=[CH:36][CH:35]=[C:34]([F:38])[CH:33]=3)[N:27]=2)=[O:25])[CH2:14][CH2:15][C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:8][CH2:7]1)=[O:5])[CH3:2]