PROCESS FOR PREPARATION OF CEPHALOSPORIN COMPOUNDS

    公开(公告)号:KR790000420B1

    公开(公告)日:1979-05-14

    申请号:KR740004319

    申请日:1974-12-20

    Applicant: GLAXO LAB LTD

    Abstract: Non-toxic 7- acylamidoceph-3 em -4-carboxylic acid derivs. (I; R= thienyl, furyl, Ra=Rb=H, C1-4 alkyl, C2-4 alkenyl, C3-7 cycloalkyl, phenyl, thienyl, furyl, carboxy, C2-5 alkoxycarbonyl, cyano) of syn-isomer or syn-and anti-mixt. contg. >90% syn-isomer were manufd. Acylation for I was carried out at -20-30≦̸C in the reactive media such as methylene chloride, dimethlformamide or acetonitril. I showed broad spectral action, esp. to gram-negative bacteria.

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