Hydrochloric Acid → 7-[2-Carboxymethoxyimino-2-(2-aminothiazol-4-yl)acetamido]-3-vinyl-3-cephem-4-carboxylic acid mono-hydrochloride

HRID 1195572Notes

Reaction equation

HRID 1195572 reaction equation
[ClH:1].C([O:6][C:7]([CH2:9][O:10][N:11]=[C:12]([C:43]1[N:44]=[C:45]([NH2:48])[S:46][CH:47]=1)[C:13]([NH:15][CH:16]1[C:41](=[O:42])[N:18]2[C:19]([C:25]([O:27]C(C3C=CC=CC=3)C3C=CC=CC=3)=[O:26])=[C:20]([CH:23]=[CH2:24])[CH2:21][S:22][C@H:17]12)=[O:14])=[O:8])(C)(C)C.C(OC(C)C)(C)C>C(O)=O>[ClH:1].[C:7]([CH2:9][O:10][N:11]=[C:12]([C:43]1[N:44]=[C:45]([NH2:48])[S:46][CH:47]=1)[C:13]([NH:15][CH:16]1[C:41](=[O:42])[N:18]2[C:19]([C:25]([OH:27])=[O:26])=[C:20]([CH:23]=[CH2:24])[CH2:21][S:22][C@H:17]12)=[O:14])([OH:8])=[O:6]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 7914Diisopropyl EtherHCID 131713177Benzhydryl 7-[2-(2-aminothiazol-4-yl)-2-tert-butoxycarbonylmethoxyiminoacetamido]-3-vinyl-3-cephem-4-carboxylate

Product 1

HCID 1317132147-[2-Carboxymethoxyimino-2-(2-aminothiazol-4-yl)acetamido]-3-vinyl-3-cephem-4-carboxylic acid mono-hydrochlorideYield 73.6%

Reagents, catalysts & solvents 1

HCID 284Formic AcidSolvent

Procedure

Conc. hydrochloric acid (0.18 g) was added to a solution of benzhydryl 7-[2-(tert-butoxycarbonylmethoxyimino]-2-(2-aminothiazol-4-yl)acetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer)(3.0 g) in formic acid (12 ml) at 10° C. and stirred for 2.5 hours at ambient temperature. The reaction mixture was poured into diisoproply ether (100 ml). The precipitates were collected by filtration, washed with diisopropyl ether and dried to give 7-[2-carboxymethoxyimino-2-(2-aminothiazol-4-yl)acetamido]-3-vinyl-3-cephem-4-carboxylic acid mono-hydrochloride (syn isomer)(1.6 g).

Workup

  1. filtrationThe precipitates were collected by filtration
  2. washwashed with diisopropyl ether
  3. customdried

Sources & evidence

ORD record
ord-4614b122b5da46509e8d2068e0500c8e
Source dataset
uspto-grants-1992_05
Patent number
US05110921

Reaction notes

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