Hydrochloric Acid → 7-[2-(2-Aminothiazol-4yl)-2-n-hexyloxyiminoacetamido]-3-chloro-3-cephem-4-carboxylic acid

HRID 544074Notes

Reaction equation

C([NH:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:26][O:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33])[C:10]([NH:12][CH:13]2[C:24](=[O:25])[N:15]3[C:16]([C:21]([OH:23])=[O:22])=[C:17]([Cl:20])[CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1)=O.Cl.CO>O1CCCC1>[NH2:3][C:4]1[S:5][CH:6]=[C:7]([C:9](=[N:26][O:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH3:33])[C:10]([NH:12][CH:13]2[C:24](=[O:25])[N:15]3[C:16]([C:21]([OH:23])=[O:22])=[C:17]([Cl:20])[CH2:18][S:19][C@H:14]23)=[O:11])[N:8]=1

Participants

Conditions

Temperature: 30 °C

Procedure

A mixture of 7-[2-(2-formamidothiazol-4-yl)-2-n-hexyloxyiminoacetamido]-3-chloro-3-cephem-4-carboxylic acid (syn isomer, 2.4 g.), conc. hydrochloric acid (1.84 g.), methanol (36 ml.) and tetrahydrofuran (30 ml.) was stirred at 30° C. for 2 hours. The resultant solution was concentrated in vacuo. Water (60 ml.) was added to the residue and the precipitates were collected by filtration, washed with water and dried over phosphorus pentoxide to give 7-[2-(2-aminothiazol-4-yl)-2-n-hexyloxyiminoacetamido]-3-chloro-3-cephem-4-carboxylic acid (syn isomer, 1.86 g.).

Workup

concentrationThe resultant solution was concentrated in vacuo
additionWater (60 ml.) was added to the residue
filtrationthe precipitates were collected by filtration
washwashed with water
dry with materialdried over phosphorus pentoxide

Sources & evidence

ORD record: ord-1914c96c523243e5903462882f4b71a1
Source dataset: uspto-grants-1984_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04447430

Reaction notes

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