1.
    发明专利
    未知

    公开(公告)号:DE3779352D1

    公开(公告)日:1992-07-02

    申请号:DE3779352

    申请日:1987-04-14

    Applicant: HOECHST AG

    Abstract: (A) 1-Hydroxy-2-pyridones of formula (I) are new: R1-R3 = H or 1-4C alkyl; X = O or S; Y = H or up to 2 halogen atoms, i.e. Cl and/or Br; Z = a direct bond, O, S, C(R)2, or 2-10C alkylene or alkenylenemm (opt. substd. by 1-4C alkyl) in which one or more C atoms may be replaced by O and/or S, provided that these are sepd. by at least 2C atoms. R = H or 1-4C alkyl; Ar = mono- or bicyclic aryl opt. substd. by up to 3 of F, Cl, Br, OMe, 1-4C alkyl, CF3 and OCF3. (B) Intermediates of formula (IV) are also new. Specifically R1 = R3 = A; R2 = Me; X = O; Z = a bond, O or an O-contg. gp.; Ar = opt. substd. phenyl , biphenyl, phenylalkylphenyl or phenoxyphenyl.

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