Sodium Carbonate → HCID 131712328, compound

HRID 894789Notes

Reaction equation

HRID 894789 reaction equation
[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:13][O:14][CH2:15][CH2:16][S:17][CH2:18][CH:19]=[CH2:20])[C:10]([OH:12])=O)[N:8]=1)=[O:2].P(Cl)(Cl)(Cl)=O.[NH2:26][CH:27]1[C:37](=[O:38])[N:29]2[C:30]([C:34]([OH:36])=[O:35])=[CH:31][CH2:32][S:33][C@H:28]12.C(=O)([O-])[O-].[Na+].[Na+]>CC(C)=O.O.O1CCCC1.CN(C)C=O>[CH:1]([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:13][O:14][CH2:15][CH2:16][S:17][CH2:18][CH:19]=[CH2:20])[C:10]([NH:26][CH:27]2[C:37](=[O:38])[N:29]3[C:30]([C:34]([OH:36])=[O:35])=[CH:31][CH2:32][S:33][C@H:28]23)=[O:12])[N:8]=1)=[O:2]

Participants

9

Reactant 4

HCID 10340Sodium CarbonateHCID 24813Phosphorus oxychlorideHCID 12941984(6R)-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acidHCID 54085586HCID 54085586, compound

Product 1

HCID 131712328HCID 131712328, compoundYield 68.3%

Reagents, catalysts & solvents 4

HCID 180AcetoneSolventHCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8028TetrahydrofuranSolvent

Procedure

2-(2-Formamidothiazol-4-yl)-2-allylthioethoxyiminoacetic acid (syn isomer, 1.95 g.), N,N-dimethylformamide (0.543 g.), phosphoryl chloride (1.14 g.) and tetrahydrofuran (19 ml.) were treated in a similar manner to that of Example 1-(1) to give an activated acid solution. A suspension of 7-amino-3-cephem-4-carboxylic acid (1.24 g.) in a mixture of acetone (12.4 ml.) and water (6.2 ml.) was adjusted to pH 7 with 20% aqueous sodium carbonate. To the solution was added dropwise the activated acid solution at -5° to 0° C. while keeping at pH 7.0 to 7.5 and stirred at the same temperature for 30 minutes. After distilling off the organic solvent in vacuo, the aqueous solution was adjusted to pH 2 with 10% hydrochloric acid and extracted with ethyl acetate twice. The extract was washed with a saturated aqueous solution of sodium chloride, dried over magnesium sulfate and concentrated in vacuo. The residue was pulverized with diethyl ether and the precipitates were collected by filtration to give 7-[2-(2-formamidothiazol-4-yl)-2-(2-allylthioethoxyimino)-acetamido]-3-cephem-4-carboxylic acid (syn isomer, 2.1 g.).

Workup

  1. customto give an activated acid solution
  2. additionTo the solution was added dropwise the activated acid solution at -5° to 0° C.
  3. distillationAfter distilling off the organic solvent in vacuo
  4. extractionextracted with ethyl acetate twice
  5. washThe extract was washed with a saturated aqueous solution of sodium chloride
  6. dry with materialdried over magnesium sulfate
  7. concentrationconcentrated in vacuo
  8. filtrationthe precipitates were collected by filtration

Sources & evidence

ORD record
ord-e12a524b632b4a0d8bde486d6379cc3f
Source dataset
uspto-grants-1981_08
Patent number
US04284631

Reaction notes

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