Trifluoroacetic acid → HCID 131713091, compound

HRID 1995796Notes

Reaction equation

HRID 1995796 reaction equation
[CH3:1][O:2][N:3]=[C:4]([C:43]1[N:44]=[C:45]([NH2:48])[S:46][CH:47]=1)[C:5]([NH:7][CH:8]1[C:41](=[O:42])[N:10]2[C:11]([C:25]([O:27]C(C3C=CC=CC=3)C3C=CC=CC=3)=[O:26])=[C:12]([CH2:15][S:16][C:17]3[N:18]=[N:19][N:20]([CH2:22][C:23]#[CH:24])[N:21]=3)[CH2:13][S:14][C@H:9]12)=[O:6].C1(OC)C=CC=CC=1.FC(F)(F)C(O)=O>C(Cl)Cl>[CH3:1][O:2][N:3]=[C:4]([C:43]1[N:44]=[C:45]([NH2:48])[S:46][CH:47]=1)[C:5]([NH:7][CH:8]1[C:41](=[O:42])[N:10]2[C:11]([C:25]([OH:27])=[O:26])=[C:12]([CH2:15][S:16][C:17]3[N:18]=[N:19][N:20]([CH2:22][C:23]#[CH:24])[N:21]=3)[CH2:13][S:14][C@H:9]12)=[O:6]

Participants

5

Reactant 3

HCID 6422Trifluoroacetic acidHCID 7519AnisoleHCID 131713092HCID 131713092, compound

Product 1

HCID 131713091HCID 131713091, compoundYield 65.5%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a mixture of benzhydryl 7-[2-methoxyimino-2-(2-aminothiazol-4-yl)acetamido]-3-[2-(2-propynyl)-2H-tetrazol-5-yl]thiomethyl-3-cephem-4-carboxylate (syn isomer)(1.9 g) in methylene chloride (19.0 ml) were added anisole (2.3 g) and trifluoroacetic acid (6.2 g) with stirring under ice-cooling and then the resulting mixture was stirred for an hour at room temperature. After the evaporation of the reaction mixture, to the residue were added water and ethyl acetate. The organic layer was separated and adjusted to pH 7.0 with an aqueous solution of sodium bicarbonate. The aqueous layer was separated, washed with ethyl acetate (x2) and then concentrated. The concentrate was adjusted to pH 3.0 with 10% hydrochloric acid. The precipitates were collected by filtration, washed with water and then dried over phosphorus pentoxide to give 7-[2-methoxyimino-2-(2-aminothiazol-4-yl)acetamido]-3-[2-(2-propynyl)-2H-tetrazol-5-yl]thiomethyl-3-cephem-4-carboxylic acid (syn isomer) (0.95 g).

Workup

  1. temperaturecooling
  2. stirringthe resulting mixture was stirred for an hour at room temperature
  3. customAfter the evaporation of the reaction mixture
  4. additionto the residue were added water and ethyl acetate
  5. customThe organic layer was separated
  6. customThe aqueous layer was separated
  7. washwashed with ethyl acetate (x2)
  8. concentrationconcentrated
  9. filtrationThe precipitates were collected by filtration
  10. washwashed with water
  11. dry with materialdried over phosphorus pentoxide

Sources & evidence

ORD record
ord-d3f35d5e5bc346228da2ff05f93e0b7c
Source dataset
uspto-grants-1983_09
Patent number
US04405617

Reaction notes

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