Acetic Acid → 7-[2-(2-Aminothiazol-4-yl)-2-carboxymethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylic acid
Reaction equation
[NH2:1][C:2]1[S:3][CH:4]=[C:5]([C:7](=[N:25][O:26][CH2:27][C:28]([O:30]CC)=[O:29])[C:8]([NH:10][CH:11]2[C:23](=[O:24])[N:13]3[C:14]([C:20]([OH:22])=[O:21])=[C:15]([CH:18]=[CH2:19])[CH2:16][S:17][C@H:12]23)=[O:9])[N:6]=1.C(=O)(O)[O-].[Na+].C(O)(=O)C>O>[NH2:1][C:2]1[S:3][CH:4]=[C:5]([C:7](=[N:25][O:26][CH2:27][C:28]([OH:30])=[O:29])[C:8]([NH:10][CH:11]2[C:23](=[O:24])[N:13]3[C:14]([C:20]([OH:22])=[O:21])=[C:15]([CH:18]=[CH2:19])[CH2:16][S:17][C@H:12]23)=[O:9])[N:6]=1Participants
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Procedure
A mixture of 7-[2-(2-aminothiazol-4-yl)-2-ethoxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylic acid (syn isomer) (1.45 g) and sodium bicarbonate (0.63 g) in water (5 ml) was stirred at ambient temperature for 7 days. The reaction mixture was adjusted to pH 6.0 with acetic acid. The solution was subjected to column chromatography on macroporous nonionic adsorption resin "Diaion HP-20" (30 ml) and eluted with water. The eluate was acidified to pH 2.2 with 10% hydrochloric acid under ice-cooling. The precipitates were collected by filtration and dried to give 7-[2-(2-aminothiazol-4-yl)-2-carboxymethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylic acid (syn isomer) (0.7 g), which was identified by comparing the physico-chemical data with those of the object compound in Example 90.
Workup
- wash" (30 ml) and eluted with water
- temperaturecooling
- filtrationThe precipitates were collected by filtration
- customdried
Sources & evidence
- ORD record
- ord-5f038fb5a74b446cb1cc6564c5f47784
- Source dataset
- uspto-grants-1993_10
- Patent number
- US05252731
Reaction notes
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