| abstract |
THE INVENTION RELATES TO THE PREPARATION OF VARIOUS B-LACTAM DERIVATIVES BY USE OF HALOGENATION AGENTS OF THE KINETIC COMPLEX TYPE TRIARYLEHALOGEN PHOSPHITE. THE USE OF VARIABLE QUANTITIES OF THESE VARIOUS REAGENTS ON VARIOUS CEPHALOSPORINS AND PENICILLINS MAKES IN PARTICULAR OBTAIN IMINO-HALOGENIDES, HALOGEN DERIVATIVES IN POSITION C-3 OF CEPHALOSPORINS, Sulfalosporins and Sulfurosulfin Forms of CEPHULOSPORIN AND AC SULFALOSPORIN AND FORMULAS. THE COMPOUNDS OBTAINED IN THESE PROCESSES ARE INTERESTING ANTIBIOTICS OR INTERMEDIARIES ALLOWING THE PREPARATION OF INTERESTING ANTIBIOTICS. |