Hydrochloric Acid → Diphenylmethyl 7-phenoxyacetamido-3-hydroxy-3-cephem-4-carboxylate

HRID 1679234Notes

Reaction equation

HRID 1679234 reaction equation
[O:1]([CH2:8][C:9]1[S:15][CH:14]2[CH:11]([C:12](=[O:37])[N:13]2[C:16](=[C:33]([OH:36])[CH2:34]Cl)[C:17]([O:19][CH:20]([C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[O:18])[N:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.C[OH:40]>O1CCCC1>[O:1]([CH2:8][C:9]([NH:10][CH:11]1[C:12](=[O:37])[N:13]2[C:16]([C:17]([O:19][CH:20]([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=3)[C:21]3[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=3)=[O:18])=[C:33]([OH:36])[CH2:34][S:15][C@H:14]12)=[O:40])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 887MethanolHCID 70504488Diphenylmethyl alpha-[3-phenoxymethyl-7-oxo-2,6-diaza-4-thiabicyclo[3,2,0]hept-2-en-6-yl]-alpha-(2-chloro-1-hydroxyethylidene)acetate

Product 1

HCID 67789034Diphenylmethyl 7-phenoxyacetamido-3-hydroxy-3-cephem-4-carboxylate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To an ice cooled solution of diphenylmethyl α-[3-phenoxymethyl-7-oxo-2,6-diaza-4-thiabicyclo[3,2,0]hept-2-en-6-yl]-α-(2-chloro-1-hydroxyethylidene)acetate (36 mg) in a mixture of methanol and tetrahydrofuran (1:1) (1.1 ml) is added 1N-hydrochloric acid (0.39 ml), warmed to the room temperature, and the mixture is stirred for 1.5 hours. The reaction mixture is poured into ice water, and is extracted with methylene chloride. The extract solution is washed with 5% aqueous sodium hydrogen carbonate solution and water, dried over sodium sulfate, and evaporated. Purification of the obtained residue by thin-layer chromatography using a mixture of benzene and ethyl acetate (3:2) gives diphenylmethyl 7-phenoxyacetamido-3-hydroxy-3-cephem-4-carboxylate (6 mg). m.p. 125°-126° C.

Workup

  1. extractionis extracted with methylene chloride
  2. washThe extract solution is washed with 5% aqueous sodium hydrogen carbonate solution and water
  3. dry with materialdried over sodium sulfate
  4. customevaporated
  5. customPurification of the obtained residue by thin-layer chromatography
  6. additiona mixture of benzene and ethyl acetate (3:2)

Sources & evidence

ORD record
ord-527bc8efd68248e2986a966f2999fb84
Source dataset
uspto-grants-1978_03
Patent number
US04079181

Reaction notes

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