Chloromethyl pivalate → 3-[(Acetyloxy)methyl]-7-[[2-carboethoxy-2-(1-pyrryl)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid pivaloyloxymethyl ester

Reaction equation

[Na].[C:2]([O:5][CH2:6][C:7]1[CH2:14][S:13][CH:12]2[N:9]([C:10](=[O:29])[CH:11]2[NH:15][C:16](=[O:28])[CH:17]([C:23]([O:25][CH2:26][CH3:27])=[O:24])[N:18]2[CH:22]=[CH:21][CH:20]=[CH:19]2)[C:8]=1[C:30]([OH:32])=[O:31])(=[O:4])[CH3:3].[C:33]([O:39][CH2:40]Cl)(=[O:38])[C:34]([CH3:37])([CH3:36])[CH3:35]>CN(C)C=O.C(OCC)(=O)C>[C:33]([O:39][CH2:40][O:31][C:30]([C:8]1[N:9]2[CH:12]([S:13][CH2:14][C:7]=1[CH2:6][O:5][C:2](=[O:4])[CH3:3])[CH:11]([NH:15][C:16](=[O:28])[CH:17]([C:23]([O:25][CH2:26][CH3:27])=[O:24])[N:18]1[CH:19]=[CH:20][CH:21]=[CH:22]1)[C:10]2=[O:29])=[O:32])(=[O:38])[C:34]([CH3:37])([CH3:36])[CH3:35]