New intermediates for the preparation of cephalosporins and process for the preparation of the intermediates
申请人:GIST-BROCADES N.V.
公开号:EP0015629A1
公开(公告)日:1980-09-17
New bromo-substituted deacetoxycephalosporins, of the general formula:
wherein R, represents a benzamido, formamido, phenylacetamido or phenoxyacetamido group, R2 represents a hydrogen or bromine atom and R3 represents a silyl group of the general formula:
wherein R', R" and R"' are the same or different and each represents an alkyl group (having at most 6 carbon atoms), a halogen-substituted alkyl group (having at most 6 carbon atoms) or an aryl group and process for the preparation of the compounds of formula I.
The compounds of formula I are suitable intermediates in processes for the preparation of known and new antibiotics.
通式如下的新型溴代去乙酰氧基头孢菌素
其中 R 代表苯甲酰胺基、甲酰胺基、苯乙酰胺基或苯氧基乙酰胺基,R2 代表氢原子或溴原子,R3 代表通式如下的硅烷基:
其中 R'、R "和 R"'相同或不同,各自代表烷基(最多有 6 个碳原子)、卤素取代的烷基(最多有 6 个碳原子)或芳基,以及式 I 化合物的制备工艺。
式 I 化合物是制备已知和新型抗生素工艺的合适中间体。
Process for the preparation of 7-acylamino-3-(thio-substituted)methyl-3-cephem-4-carboxylic acid 1-oxide derivatives
申请人:GIST-BROCADES N.V.
公开号:EP0047560A2
公开(公告)日:1982-03-17
Process for the preparation of 7-acylamino-3-(thio--substituted)methyl-3-cephem-4-carboxylic acid 1-oxide derivatives by reacting a 7-acylamino-3-bromomethyl-3--cephem-4-carboxylic acid 1-oxide derivative with a silylated thiol of the general formula:
wherein R represents an organic group, preferably a 5- or 6-membered heterocyclic group, which reaction is preferably carried out in the presence of an inert organic solvent at a temperature between - 20° and 80°C thereby obtaining the corresponding 7-acylamino-3-(R--thiomethyl)-3-cephem-4-carboxylic acid 1-oxide derivatives, many of which are valuable intermediates in methods for the preparation of therapeutically active cephalosporins.