Hydrochloric Acid → 7-[2-methoxyimino-2-(2-amino-1,3-thiazol-4-yl)acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid

HRID 1065858Notes

Reaction equation

HRID 1065858 reaction equation
[CH3:1][O:2][N:3]=[C:4]([C:28]1[N:29]=[C:30]([NH:33]C(=O)C(F)(F)F)[S:31][CH:32]=1)[C:5]([NH:7][CH:8]1[C:26](=[O:27])[N:10]2[C:11]([C:23]([OH:25])=[O:24])=[C:12]([CH2:15][S:16][C:17]3[N:21]([CH3:22])[N:20]=[N:19][N:18]=3)[CH2:13][S:14][C@H:9]12)=[O:6].[OH-].[Na+].O.Cl>C(O)C.C(OCC)(=O)C>[CH3:1][O:2][N:3]=[C:4]([C:28]1[N:29]=[C:30]([NH2:33])[S:31][CH:32]=1)[C:5]([NH:7][CH:8]1[C:26](=[O:27])[N:10]2[C:11]([C:23]([OH:25])=[O:24])=[C:12]([CH2:15][S:16][C:17]3[N:21]([CH3:22])[N:20]=[N:19][N:18]=3)[CH2:13][S:14][C@H:9]12)=[O:6]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 14798Sodium HydroxideHCID 1317116147-[2-methoxyimino-2-{2-(2,2,2-trifloroacetamido)-1,3-thiazol-4-yl}acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid

Product 1

HCID 1317116137-[2-methoxyimino-2-(2-amino-1,3-thiazol-4-yl)acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acidYield 47.5%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 7-[2-methoxyimino-2-{2-(2,2,2-trifluoroacetamido)-1,3-thiazol-4-yl}acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (syn isomer) (0.3 g.) in a 0.1 N aqueous solution of sodium hydroxide (10.5 ml.) was warmed at 45° C. for 6 hours. Water (15 ml.) and ethyl acetate (30 ml.) were added to the reaction mixture and the resulting mixture was adjusted to pH 3.5 with 10% hydrochloric acid. The aqueous layer was separated, washed with ethyl acetate and adjusted to pH 5.0 with an aqueous solution of sodium bicarbonate. The aqueous solution was subjected to column chromatography on Amberlite XAD-2 (20 ml.) (prepared by Rohm & Haas Co.) using 10% ethanol as developing solvent. The eluate containing object compound was collected and lyophilized to give 7-[2-methoxyimino-2-(2-amino-1,3-thiazol-4-yl)acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (syn isomer) (0.12 g.).

Workup

  1. customThe aqueous layer was separated
  2. washwashed with ethyl acetate
  3. customThe aqueous solution was subjected to column chromatography on Amberlite XAD-2 (20 ml.) (prepared by Rohm & Haas Co.)
  4. additionThe eluate containing object compound
  5. customwas collected

Sources & evidence

ORD record
ord-130e451af7644c7d81d4019258592759
Source dataset
uspto-grants-1982_05
Patent number
US04331664

Reaction notes

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