Hydrochloric Acid → HCID 23676283, compound

HRID 1073811Notes

Reaction equation

HRID 1073811 reaction equation
[NH2:1][C@@H:2]1[C:14](=[O:15])[N:4]2[C:5]([C:11]([OH:13])=[O:12])=[C:6]([CH2:9][OH:10])[CH2:7][S:8][C@H:3]12.C(=O)([O-])O.[Na+:20].Cl.ClCC([NH:26][C:27]1[S:28][CH:29]=[C:30](/[C:32](=[N:36]/[O:37][CH3:38])/[C:33](Cl)=[O:34])[N:31]=1)=O.Cl.CNC(=S)[S-].[Na+]>C(OCC)(=O)C.O.C1COCC1>[NH2:26][C:27]1[S:28][CH:29]=[C:30](/[C:32](=[N:36]/[O:37][CH3:38])/[C:33]([NH:1][C@@H:2]2[C:14](=[O:15])[N:4]3[C:5]([C:11]([O-:13])=[O:12])=[C:6]([CH2:9][OH:10])[CH2:7][S:8][C@H:3]23)=[O:34])[N:31]=1.[Na+:20]

Participants

9

Reactant 5

HCID 313Hydrochloric AcidHCID 516892Sodium BicarbonateHCID 5366415Metam-sodiumHCID 11031679(6R-trans)-7-Amino-3-(hydroxymethyl)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acidHCID 12884125(2Z)-2-[2-[(2-chloroacetyl)amino]-1,3-thiazol-4-yl]-2-methoxyiminoacetyl chloride;hydrochloride

Product 1

HCID 23676283HCID 23676283, compoundYield 55.1%

Reagents, catalysts & solvents 3

HCID 962WaterSolvent2×HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

In 500 ml of a (1:1) mixture of water and THF was suspended 11.9 g of 7β-amino-3-hydroxymethyl-3-cephem-4-carboxylic acid, and 19.4 g of sodium hydrogencarbonate was added under ice-cooling and stirring. To the suspension was added 20.6 g of 2-(2-chloroacetamidothiazol-4-yl)-(Z)-2-methoxyiminoacetyl chloride hydrochloride, followed by stirring for 30 minutes. The reaction mixture was shaken with 100 ml of water and 150 ml of ethyl acetate. The aqueous layer was taken and adjusted to pH 7.0 with 1N-hydrochloric acid under ice-cooling and stirring. To the mixture was gradually added 12.0 g of sodium N-methyldithiocarbamate at room temperature under stirring to remove the amino group. After shaking with 200 ml of ethyl acetate, the aqueous layer was taken and concentrated to 50 ml under reduced pressure. The residue was subjected to a column chromatography on XAD-II (1.2l) eluting with water. The fractions containing the objective compound were collected, concentrated under reduced pressure, and then lyophilized to give 12.4 g of sodium 7β-[2-(2-aminothiazol-4-yl)-(Z)-2-methoxyiminoacetamido]-3-hydroxymethyl-3-cephem-4-carboxylate as pale yellow powders.

Workup

  1. additionwas added under ice-
  2. temperaturecooling
  3. stirringby stirring for 30 minutes
  4. temperaturecooling
  5. stirringstirring
  6. customat room temperature
  7. stirringunder stirring
  8. customto remove the amino group
  9. stirringAfter shaking with 200 ml of ethyl acetate
  10. concentrationconcentrated to 50 ml under reduced pressure
  11. washeluting with water
  12. additionThe fractions containing the objective compound
  13. customwere collected
  14. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-30b3fb09926f40758fbf320b0728c48f
Source dataset
uspto-grants-1990_11
Patent number
US04971963

Reaction notes

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