65.
    发明专利
    未知

    公开(公告)号:DD223450A5

    公开(公告)日:1985-06-12

    申请号:DD26208384

    申请日:1984-04-18

    Applicant: CIBA GEIGY AG

    Abstract: Prodn. of benzofuranones of formula (I) (and their salts, tautomers and/or isomers) comprises converting X in cpds. (II) (or their salts) to OH, opt. followed by conversion of salts to free bases (or vice versa) and/or sepn.of isomers. - R1 = H or aliphatic gp. R2 = amino substd. by a divalent hydrocarbyl gp. ring A may contain other substitis.

Patent Agency Ranking