3.
    发明专利
    未知

    公开(公告)号:FI108725B

    公开(公告)日:2002-03-15

    申请号:FI923966

    申请日:1992-09-04

    Applicant: HOECHST AG

    Abstract: Enterally absorbable diastereomers of (6R,7R)-7-[2-(2-aminothiazol-4-yl)-2-(Z)-(methoxyimino)acetamido]-3-(m ethoxymethyl)-3-cephem-4-carboxylic acid 1-(isopropoxycarbonyloxy)ethyl ester of the formula I and its physiologically acceptable salts and also diastereomerically pure salts of the compounds of the general formula II where HX represents a mono- or polybasic acid and where X represents an inorganic or organic physiologically acceptable anion, and a process for the preparation of these compounds of the formula I or II are described, which is characterised in that on mixing together one equivalent of a solution of the diastereomer mixture of the formula III with 0.2 - 2 equivalents of a solution of the acid component HY the more poorly soluble diastereomer of the general formula IV is first precipitated and separated off by filtration, then the more readily soluble diastereomer of the general formula IV is precipitated from the filtration solution, it being possible in the subsequent subsidiary steps for the acid components HY to be identical or different and any desired sequence of the addition of different acid components HY to be used, and the salts obtained are optionally further purified by crystallisation.

    PROCESS FOR THE PRODUCTION OF CEPHEM PRODROG-ESTERS

    公开(公告)号:HU219587B

    公开(公告)日:2001-05-28

    申请号:HU9300374

    申请日:1993-02-12

    Applicant: HOECHST AG

    Abstract: The invention relates to a process for the preparation of cephem prodrug esters of the formula in which R is C1-C5-alkanoyloxy-C1-C3-alkyl or C1-C5-alkoxycarbonyloxy-C1-C3-alkyl and X is an inorganic or organic anion, and in which the hydroxyimino group is present in the syn form, characterised in that a compound of the formula II in which R is a protective group which can be eliminated by acid hydrolysis, is reacted with a bis(2-benzothiazolyl) disulphide of the formula VI in which R is hydrogen, C1-C6-alkyl, C2-C6-alkenyl, C3-C6-alkynyl, C1-C6-alkyloxy, C2-C6-alkenyloxy, C3-C6-alkynyloxy, hydroxyl, acetoxy, halogen, nitro, amino, carboxyl or the sulpho group, and triphenylphosphine in an inert solvent in the presence of a tertiary amine to give a compound of the formula V in which R and R have the abovementioned meanings, subsequently this compound is reacted with a 7-aminoceph-3-em-4-carboxylic ester of the formula III in which R has the abovementioned meaning, in inert organic or dipolar aprotic solvents at temperatures between 0 DEG C and +80 DEG C, and the oxime-protected compound of the formula IV which is formed in which R and R have the abovementioned meanings, and in which the protected oxime group is present in the syn form, is treated with inorganic acids or with aliphatic or aromatic sulphonic acids in organic solvents at temperatures between +20 DEG and +110 DEG C to form the compound of the formula I.

    DIASTEREOMERS OF 1-(ISOPROPOXYCARBONYLOXY)ETHYL 3-CEPHEM-4-CARBOXYLATE AND PROCESSES FOR THEIR PREPARATION

    公开(公告)号:AU2218392A

    公开(公告)日:1993-03-11

    申请号:AU2218392

    申请日:1992-09-08

    Applicant: HOECHST AG

    Abstract: Enterally absorbable diastereomers of (6R,7R)-7-[2-(2-aminothiazol-4-yl)-2-(Z)-(methoxyimino)acetamido]-3-(m ethoxymethyl)-3-cephem-4-carboxylic acid 1-(isopropoxycarbonyloxy)ethyl ester of the formula I and its physiologically acceptable salts and also diastereomerically pure salts of the compounds of the general formula II where HX represents a mono- or polybasic acid and where X represents an inorganic or organic physiologically acceptable anion, and a process for the preparation of these compounds of the formula I or II are described, which is characterised in that on mixing together one equivalent of a solution of the diastereomer mixture of the formula III with 0.2 - 2 equivalents of a solution of the acid component HY the more poorly soluble diastereomer of the general formula IV is first precipitated and separated off by filtration, then the more readily soluble diastereomer of the general formula IV is precipitated from the filtration solution, it being possible in the subsequent subsidiary steps for the acid components HY to be identical or different and any desired sequence of the addition of different acid components HY to be used, and the salts obtained are optionally further purified by crystallisation.

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