PROCESS FOR PREPARING 3-SUBSTITUTED METHYL-3-CEPHEM DERIVATIVES

PROCESS FOR PREPARING 3-SUBSTITUTED METHYL-3-CEPHEM DERIVATIVES

Various 7-amino-3-substituted-methyl-3-cephem-4-carboxylic acids and lower alkylsilyl derivatives such as 7-amino-3-(2,3-cyclopenteno-1-pyridiniomethyl)-3-cephem-4-carboxylic acid iodide and trimethylsilyl 7-trimethyl- silylamino-3-(5,6,7,8-tetrahydro-2-isoquinoliniomethyl)-3-cephem-4-carboxylate io...

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Bibliographische Detailangaben
Hauptverfasser: HARA, RYUICHIRO, SHIBANUMA, TATAOH, KOTA, AKIOH, YAMAJAKI, ATSUKI, NAKANO, GOCHI, NAKANO, NORIAKI, MURAKAMI, YUKIYATSU
Format: Patent
Sprache:eng ; kor
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC CHEMISTRY
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
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Zusammenfassung:Various 7-amino-3-substituted-methyl-3-cephem-4-carboxylic acids and lower alkylsilyl derivatives such as 7-amino-3-(2,3-cyclopenteno-1-pyridiniomethyl)-3-cephem-4-carboxylic acid iodide and trimethylsilyl 7-trimethyl- silylamino-3-(5,6,7,8-tetrahydro-2-isoquinoliniomethyl)-3-cephem-4-carboxylate iodide are valuable intermediates in the preparation of cephalosporin antibacterial agents. A new process for the preparation of these acids and derivatives has been devised.