PROCESS FOR PREPARING CEPHEM DERIVATIVES

    公开(公告)号:KR860002184B1

    公开(公告)日:1986-12-24

    申请号:KR780000888

    申请日:1978-03-30

    Applicant: HOECHST AG

    Abstract: Title compds. I[R1=H, protected amino; R2=H, alkyl, alkenyl, Ph, benzyl; R3=H, ester, anion; R4=H, alkoxy; A=-CH2SR5, -CH2Y; R5=hetero cyclic group; Y=pyridinium, quinolinium group! were prepd. Thus, 2.6 g mixt. of H2O, ethanol, and 7-beta-[alpha-sinmethoximino-alpha-(2- amino-thiazol-4-yl)-acetamido!-cephalosporanic acid were dissolved in 50ml H2O with 1.5 g 2-mercapto-3-oxy-4phenyl-1,3-thiazole and incubated for 2 h at 64≦̸C at pH 6.0-7.0 to give 0.9 g 7-beta-[alpha- sin-methoximino-alpha-(2-amino-thiazol-4yl)-acetamido!-3-(3-oxy-4- phenyl-1,3-thiazol-2-yl-thiomethyl)-3cephem-4-carboxylic acid.

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