Sodium Acetate → Benzhydryl 7-[2-(2-aminothiazol-4-yl)-2-(2,2,2-trichloroethoxycarbonylmethoxyimino)acetamido]-3-vinyl-3-cephem-4-carboxylate

HRID 1088172Notes

Reaction equation

Br[CH2:2][C:3](=O)[C:4](=[N:35][O:36][CH2:37][C:38]([O:40][CH2:41][C:42]([Cl:45])([Cl:44])[Cl:43])=[O:39])[C:5]([NH:7][CH:8]1[C:33](=[O:34])[N:10]2[C:11]([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:12]([CH:15]=[CH2:16])[CH2:13][S:14][C@H:9]12)=[O:6].[NH2:47][C:48]([NH2:50])=[S:49].C([O-])(=O)C.[Na+]>O1CCCC1.O>[NH2:50][C:48]1[S:49][CH:2]=[C:3]([C:4](=[N:35][O:36][CH2:37][C:38]([O:40][CH2:41][C:42]([Cl:44])([Cl:45])[Cl:43])=[O:39])[C:5]([NH:7][CH:8]2[C:33](=[O:34])[N:10]3[C:11]([C:17]([O:19][CH:20]([C:21]4[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=4)[C:27]4[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=4)=[O:18])=[C:12]([CH:15]=[CH2:16])[CH2:13][S:14][C@H:9]23)=[O:6])[N:47]=1

Participants

Conditions

Temperature: 35 °C

Procedure

To a solution of benzhydryl 7-[4-bromo-2-(2,2,2-trichloroethoxycarbonylmethoxyimino)-3-oxobutyramido]-3-vinyl-3-cephem-4-carboxylate (26.0 g) in tetrahydrofuran (100 ml) was added a solution of thiourea (3.1 g) and sodium acetate (3.3 g) in water (100 ml), and the mixture was stirred at 35° C. for 3 hours. The reaction mixture was extracted with ethyl acetate, and the extract was washed with water, followed by drying over magnesium sulfate. Removal of the solvent gave benzhydryl 7-[2-(2-aminothiazol-4-yl)-2-(2,2,2-trichloroethoxycarbonylmethoxyimino)acetamido]-3-vinyl-3-cephem-4-carboxylate (syn isomer) (12.5 g).

Workup

extractionThe reaction mixture was extracted with ethyl acetate
washthe extract was washed with water
dry with materialby drying over magnesium sulfate
customRemoval of the solvent

Sources & evidence

ORD record: ord-2731d62fcbfa448e9a0fb35244f15bc8
Source dataset: uspto-grants-1990_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04960889

Reaction notes

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