Trifluoroacetic acid → HCID 131713189, compound

HRID 647720Notes

Reaction equation

HRID 647720 reaction equation
[NH2:1][C:2]1[O:6][N:5]=[C:4]([C:7](=[N:38][O:39][CH3:40])[C:8]([NH:10][CH:11]2[C:36](=[O:37])[N:13]3[C:14]([C:20]([O:22]C(C4C=CC=CC=4)C4C=CC=CC=4)=[O:21])=[C:15]([CH:18]=[CH2:19])[CH2:16][S:17][C@H:12]23)=[O:9])[N:3]=1.C1(OC)C=CC=CC=1.FC(F)(F)C(O)=O.C(OC(C)C)(C)C>C(Cl)Cl>[NH2:1][C:2]1[O:6][N:5]=[C:4]([C:7](=[N:38][O:39][CH3:40])[C:8]([NH:10][CH:11]2[C:36](=[O:37])[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:3]=1

Participants

6

Reactant 4

HCID 6422Trifluoroacetic acidHCID 7519AnisoleHCID 7914Diisopropyl EtherHCID 131713185HCID 131713185, compound

Product 1

HCID 131713189HCID 131713189, compoundYield 94.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a suspension of benzhydryl 7-[2-(5-amino-1,2,4-oxadiazol-3-yl)-2-methoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate (2.4 g) in methylene chloride (15 ml) and anisole (1.8 g) was added trifluoroacetic acid (4.9 g), and the mixture was stirred at ambient temperature for an hour. To the reaction mixture was added diisopropyl ether (150 ml), and the precipitated material was collected by filtration, followed by suspension in a mixture of ethyl acetate and water, and adjusting to pH 7 with 10% aqueous sodium hydroxide. To the separated aqueous solution was added ethyl acetate and saturated with sodium chloride. After adjusting to pH 1.5 with 10% hydrochloric acid, the ethyl acetate solution was separated, washed with a saturated aqueous sodium chloride and then dried over anhydrous magnesium sulfate. Removal of the solvent gave a residue, which was washed with diethyl ether to obtain 7-[2-(5-amino-1,2,4-oxadiazol-3-yl)-2-methoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylic acid (syn isomer)(1.6 g).

Workup

  1. filtrationthe precipitated material was collected by filtration
  2. additionfollowed by suspension in a mixture of ethyl acetate and water
  3. additionTo the separated aqueous solution was added ethyl acetate
  4. customthe ethyl acetate solution was separated
  5. washwashed with a saturated aqueous sodium chloride
  6. dry with materialdried over anhydrous magnesium sulfate
  7. customRemoval of the solvent
  8. customgave a residue, which
  9. washwas washed with diethyl ether

Sources & evidence

ORD record
ord-10a075cbc868459cb3273429b7ea7310
Source dataset
uspto-grants-1983_10
Patent number
US04409214

Reaction notes

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