Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1989-03-23
1992-11-17
Rizzo, Nicholas S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
540227, 540221, 514200, 514202, C07D50116, A61K 31545
Patent
active
051644940
ABSTRACT:
Process for the preparation of 7.beta.-amino-3-substituted methyl-3-cephem-4-carboxylic acid derivatives, new intermediates comprising 7.beta.-(cyclo)alkylideneammonio-3-halomethyl-3-cephem-4-carbox ylic acid derivatives and 7.beta.-amino/ammonio-3-bromomethyl-3-cephem-4-carboxylic acid derivatives and the processes for the preparation of these intermediates.
REFERENCES:
patent: 4032521 (1977-06-01), Christensen et al.
Dekoning Jan J.
Grootveld Herman H.
Leenderts Everardus J. A. M.
Verwej Jan
Witkamp Hendrik A.
Gist-Brocades N.V.
Rizzo Nicholas S.
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