PROCESS FOR THE PREPARATION OF BETA-LACTAM COMPOUNDS

    公开(公告)号:PT83334A

    公开(公告)日:1986-10-01

    申请号:PT8333486

    申请日:1986-09-09

    Applicant: CIBA GEIGY AG

    Abstract: An improved process for the preparation of compounds of the formula … … or salts thereof, starting from compounds of the formulae … … via compounds of the formulae … … in which compounds R1 represent hydrogen or lower alkyl, R2 represents an organic radical which may carry a functional group which is unprotected or protected by a customary protecting group R, R3 represents hydrogen or a customary carboxyl protecting group R, W represents a group exchangeable for a thiocarboxyl radical of the formula III and Z represents oxygen or sulphur.

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