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.
Process for the preparation of cephem compounds and cephalosporin derivatives
申请人:GIST-BROCADES N.V.
公开号:EP0300546A1
公开(公告)日:1989-01-25
Process for the preparation of 7β-amino-3-substituted methyl-3-cephem-4-carboxylic acid derivatives, new intermediates comprising 7β-(cyclo)alkylideneammonio-3-halomethyl-3-cephem-4-carboxylic acid derivatives and 7β-amino/ammonio-3-bromomethyl-3-cephem-4-carboxylic acid derivatives and the processes for the preparation of these intermediates.