Sulphamylanthranilic acids prepared from nitrobenzoic

    公开(公告)号:DE1808016A1

    公开(公告)日:1970-01-08

    申请号:DE1808016

    申请日:1968-11-09

    Applicant: HOECHST AG

    Abstract: Prepn. of sulphamylanthranilic acids of formula (I) by the method given under 'PREPARATION'. Hal = Cl, Br R = benzyl, thienyl, furfuryl (I) are diuretic and saluretic agents. A mixt. of 3-sulphamyl-4-chloro-6-nitrobenzoic acid (10 g) and benzylamine (40 ml) is stirred at 100-110 deg. for 1 hr. and the hot mixt. poured into 2N-HCl (400 ml). The recovered product is dried, powdered, extd. several times with CH2Cl2 and then purified by charcoal treatment in aq. NaHCO3 soln. to yield 3-sulphamyl-4-chloro-6-benzylaminobenzoic acid (65%). m.p. 240 deg.

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