Sodium Hydroxide → Sodium 7-[2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylate dihydrate

HRID 2296148Notes

Reaction equation

HRID 2296148 reaction equation
[OH-:1].[Na+:2].[NH2:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:25][O:26][CH3:27])[C:10]([NH:12][CH:13]2[C:23](=[O:24])[N:15]3[C:16]([C:20]([OH:22])=[O:21])=[CH:17][CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1>C(O)C.O>[OH2:11].[OH2:1].[NH2:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:25][O:26][CH3:27])[C:10]([NH:12][CH:13]2[C:23](=[O:24])[N:15]3[C:16]([C:20]([O-:22])=[O:21])=[CH:17][CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1.[Na+:2]

Participants

5

Reactant 2

HCID 14798Sodium HydroxideHCID 1317124447-[2-(2-Amino-4-thiazolyl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylic acid

Product 1

HCID 131712448Sodium 7-[2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylate dihydrate

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Procedure

20% Aqueous solution of sodium hydroxide was added to a suspension of 7-[2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylic acid (syn isomer, 15 g.) in a mixture of ethanol (8 ml.) and water (8 ml.) at room temperature to make a solution of pH 7.5. After filtration and washing, the filtrate and washings were combined (which contained 18.3 ml. of water) and added dropwise to ethanol (46 ml.) at 20° to 25° C. under stirring and stirred at the same temperature for 30 minutes. Ethanol (28 ml.) was added dropwise to the mixture over 30 minutes, and stirred at the same temperature for 2 hours. The precipitates were collected by filtration, washed with ethanol (20 ml.) and dried in vacuo at room temperature to give plates of sodium 7-[2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-4-carboxylate dihydrate (syn isomer, 13.5 g.), mp 260° C. (dec.).

Workup

  1. filtrationAfter filtration
  2. washwashing
  3. additionadded dropwise to ethanol (46 ml.) at 20° to 25° C.
  4. stirringstirred at the same temperature for 30 minutes
  5. additionEthanol (28 ml.) was added dropwise to the mixture over 30 minutes
  6. stirringstirred at the same temperature for 2 hours
  7. filtrationThe precipitates were collected by filtration
  8. washwashed with ethanol (20 ml.)
  9. customdried in vacuo at room temperature

Sources & evidence

ORD record
ord-14279bea77ab4cd1a5f96f1a19fa33da
Source dataset
uspto-grants-1984_01
Patent number
US04427674

Reaction notes

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