Sodium Bicarbonate → (6R,7R)-7-Amino-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid

HRID 1660640Notes

Reaction equation

[NH2:1][C@@H:2]1[C:20](=[O:21])[N:4]2[C:5]([C:17]([OH:19])=[O:18])=[C:6]([CH2:9]OC(=O)CC(=O)C)[CH2:7][S:8][C@H:3]12.C(=O)([O-])O.[Na+].[SH:27][C:28]1[N:32]([CH3:33])[N:31]=[N:30][N:29]=1>O>[NH2:1][C@@H:2]1[C:20](=[O:21])[N:4]2[C:5]([C:17]([OH:19])=[O:18])=[C:6]([CH2:9][S:27][C:28]3[N:32]([CH3:33])[N:31]=[N:30][N:29]=3)[CH2:7][S:8][C@H:3]12

Participants

Conditions

Temperature: 60 °C

Procedure

In water (30 ml) were dissolved 7β-amino-3-(3-oxobutyryloxy)methyl-3-cephem-4-carboxylic acid (3.14 g), sodium hydrogen carbonate (1.84 g) and 5-mercapto-1-methyl-1H-tetrazole (1.4 g) and the solution was adjusted its pH to 5.5, followed by stirring and heating at 60° C. for one hour. After cooling, the reaction solution was washed with dichloromethane (20 ml) and the aqueous layer was adjusted to pH 3.3, followed by stirring for one hour under ice-cooling. The resultant precipitates were collected by filtration and washed with water, methanol and acetone in this order, followed by drying to give 7β-amino-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (2.7 g).

Workup

temperatureAfter cooling
washthe reaction solution was washed with dichloromethane (20 ml)
stirringby stirring for one hour under ice-
temperaturecooling
customThe resultant precipitates
filtrationwere collected by filtration
washwashed with water, methanol and acetone in this order
customby drying

Sources & evidence

ORD record: ord-55130a626afa49c8b6fd0528fa91f73e
Source dataset: uspto-grants-1981_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04308381

Reaction notes

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