Polychalcogen ester of cephem compound, process for preparing th

Details Polychalcogen ester of cephem compound, process for preparing th Polychalcogen ester of cephem compound, process for preparing th

1978-04-21

1980-09-30

Berch, Mark L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 21, 544 24, 544 25, 544 26, 544 27, 544 28, 544 29, 544 30, C07D50104, C07D50122, C07D50134, C07D50126

Patent

active

042257069

ABSTRACT:
A novel ester of a cephem compound having a carboxyl group at the 4-position in the nucleus; a process for preparing the same by reacting a cephem carboxylic acid or its salt with a halogenide; and a method for removing the protective group for the carboxyl group in the nucleus of a cephem compound by contacting it with an alcohol, or with an organic solvent in the presence of a Lewis acid.

REFERENCES:
patent: 3862004 (1975-01-01), Takahashi
patent: 3945888 (1976-03-01), Takahashi
Merck Index, p. 960, 209.
Fletcher et al., "Nomenclature of Organic Compounds", p. 171.

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