Hydrochloric Acid → 7beta-Amino-3-(3-amino-2-methyl-1-pyrazolio)methyl-3-cephem-4-carboxylate trihydrochloride

HRID 1614073Notes

Reaction equation

HRID 1614073 reaction equation
[ClH:1].[NH2:2][C@@H:3]1[C:23](=[O:24])[N:5]2[C:6]([C:20]([O-:22])=[O:21])=[C:7]([CH2:10][N+:11]3[N:12]([CH3:19])[C:13]([NH:16]C=O)=[CH:14][CH:15]=3)[CH2:8][S:9][C@H:4]12.C(OCC)(=O)C>O1CCCC1.CO>[ClH:1].[ClH:1].[ClH:1].[NH2:2][C@@H:3]1[C:23](=[O:24])[N:5]2[C:6]([C:20]([O-:22])=[O:21])=[C:7]([CH2:10][N+:11]3[N:12]([CH3:19])[C:13]([NH2:16])=[CH:14][CH:15]=3)[CH2:8][S:9][C@H:4]12

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 8857Ethyl AcetateHCID 108068457beta-Amino-3-(3-formamido-2-methyl-1-pyrazolio)methyl-3-cephem-4-carboxylate

Product 1

HCID 1317163857beta-Amino-3-(3-amino-2-methyl-1-pyrazolio)methyl-3-cephem-4-carboxylate trihydrochloride

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

Concentrated hydrochloric acid (0.353 ml) was added to a mixture of bis(trifluoroacetic acid) salt of 7β-amino-3-(3-formamido-2-methyl-1-pyrazolio)methyl-3-cephem-4-carboxylate (0.565 g) in tetrahydrofuran (3 ml) and methanol (3 ml) at ambient temperature. After being stirred at the same temperature for 12 hours, the mixture was added dropwise to ethyl acetate (100 ml). The resulting precipitate was collected by filtration to give 7β-amino-3-(3-amino-2-methyl-1-pyrazolio)methyl-3-cephem-4-carboxylate trihydrochloride (292 mg).

Workup

  1. filtrationThe resulting precipitate was collected by filtration

Sources & evidence

ORD record
ord-a3a121248a82475693f60e2ee3be48b0
Source dataset
uspto-grants-1993_03
Patent number
US05194432

Reaction notes

Loading…