Use of bistrimethylsilylated intermediates in the preparation of semisynthetic 7-amino-3-substituted cephems. Expedient syntheses of a new 3-[(1-methyl-1-pyrrolidinio)methyl]cephalosporin
作者:WILLIAM J. GOTTSTEIN、MURRAY A. KAPLAN、JEAN A. COOPER、VERA H. SILVER、SOLOMON J. NACHFOLGER、ALPHONSE P. GRANATEK
DOI:10.7164/antibiotics.29.1226
日期:——
The synthesis of 7-(2-aminomethylphenylacetamido)-3-(1-carboxymethyltetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid (BL-S786) is described and the antimicrobial activities are compared with cefazolin and cefamandole. The compound exhibits broad antimicrobial spectrum, produces high intramuscular blood levels in mice and demonstrates a high degree of therapeutic efficacy in experimental bacterial infections in rodents.
Process for the preparation of 7-(2-amino-2-phenylacetamido)cephem derivatives and their use for the preparation of antibacterial agents
申请人:Eisai Co., Ltd.
公开号:EP0065270A2
公开(公告)日:1982-11-24
Improved process for the preparation of 7-(2-amino--2-phenyl-acetamido)cephem derivatives of the general formula (I):
wherein R, is a hydrogen atom or hydroxyl group, n stands for 0, 1 or 2, and A denotes a nitrogen-containing heterocyclic group or a direct bond coupling directly the sulfur atom and the -(CH2)nCOOH group together, as well as pharmaceutically acceptable salts thereof. The process is not only simple and easy to carry out, but also provides as crystalline precipitate the intended products with a high yield. The 7-(2-amino-2-phenyl-acetamido)cephem derivatives are useful as intermediates for syntheses of antibacterial agents.
N-(Substituted chromone-3-carbonyl) phenylglycine derivatives represented by the formula
in which R, represents a hydrogen atom, and each R, represents a hydrogen atom, an alkoxycarbonyl group or a chlorine-substituted carbonyl group, are useful intermediates for cephem compounds which are excellent as antibacterial agents.
N-(取代的色酮-3-羰基)苯基甘氨酸衍生物由式(其中 R 代表氢原子,每个 R 代表氢原子、烷氧羰基或氯取代的羰基)表示,是具有优异抗菌性能的头孢类化合物的有用中间体。
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.