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Oxobenzofuranylide-dihydroindolone

  • US 6,503,937 B1
  • Filed: 04/03/2001
  • Issued: 01/07/2003
  • Est. Priority Date: 10/22/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. An oxobenzofuranylidene-dihydroindolone of formula trans-(Ia) or cis-(Ib) embedded imagewherein A1 and A2 are each independently of the other unsubstituted or mono- to tetra-substituted 1,2-phenylene and R1 is hydrogen, C1-C25alkyl, C5-C12cycloalkyl, C6-C24aryl, a heteroaromatic radical, —

  • (CH2)n

    COR2 or —

    (CH2)m

    OR3, wherein R2 is hydroxy, —

    OX, or, unsubstituted or mono- or poly-substituted by hydroxy, —

    OX or by amino, C1-C25alkoxy, C1-C25alkylamino or C1-C25dialkylamino, di(C6-C24aryl)amino, C1-C12alkyl, C2-C24alkenyl, and X is a cation, and R3 is hydrogen or —

    CO—

    (C1-C25alkyl), and n and m denote each independently of the other a whole number in the range from 0 to 6, and a single C—

    C bond also may have been replaced by a corresponding ether unit, C—

    O—

    C, with the proviso that, when R1 is hydrogen and A2 is 1,2-phenylene, A1 is not 4-chloro-3,5-dimethyl-1,2-phenylene or 3,5-dimethyl-1,2-phenylene.

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