PROCESS FOR PREPARING CEPHALOSPORIN DERIVATIVES

    公开(公告)号:KR820001127B1

    公开(公告)日:1982-06-26

    申请号:KR780003624

    申请日:1978-11-30

    Applicant: HOECHST AG

    Abstract: Title compds. (I; n = 0-1; X = H, C1-4 alkyl, carboxymethyl, C1-4 alkoxycarbonylmethyl, cyanomethyl; Y = Me, halogen; A = H, ester, cation) were prepd. from IV (R1 = H, amino protecting group; X1 = X or -CH2CO2R3; R3 = separating group) obtained by reaction of II and III. Thus, 980 mg 7-≮αsyn-methoxyimino-α-(2-amino-5-chloro-thiazol-4-yl)-acetamido≉-cephalosporanic acid was dissolved in a mixed soln. contg. 8 ml 98% formic acid and 2 ml methanol, added 410 mg THF soln. contg. 85% m-chloroperbenzoic acid, and stirred for 1 hr to give 850 mg I.

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