Hydrochloric Acid → HCID 131712589, compound

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Reaction Steps

A mixture of 7-[2-methylthiomethoxyimino-2-(2-formamidothiazol-4-yl)acetamido]-3-(1-allyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (syn isomer)(0.95 g), conc.hydrochloric acid (0.324 g), methanol (9.5 ml) and tetrahydrofuran (2 ml) was stirred for 2 hours at ambient temperature. The solvent was distilled off under reduced pressure and the residue was dissolved in a saturated aqueous solution of sodium bicarbonate. The aqueous solution was washed with ethyl acetate (25 ml) and adjusted to pH 1.5 with 10% hydrochloric acid. Precipitates were collected by filtration, washed with water and dried to give 7-[2-methylthiomethoxyimino-2-(2-aminothiazol-4-yl)acetamido]-3-(1-allyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid (syn isomer)(0.78 g).

Provenance & Evidence