摘要 |
The compound has the formula (I) or formula VIII (X)n-D-O-A-C(Hal)(COOR1)-COOR1' (I) (X)n-D-O-A-C(H)(Hal)-COOH (VIII) wherein A is optionally saturated optionally substituted alkylene; D is a homo- or heterocarbon mono-, di- or tricyclic aromatic structure, which may include one or more heteroatoms; X is H, alkyl, alkoxy, alkoxyalkyl, aryl, aralkyl, aralkylaryl, halo, CF3, CN, OH, NO2, NH2, carboxyl, alkoxycarbonyl, carboxamide, sulphonyl, sulphone, sulphonamide, sulphamoyl, alkylsulphonamino, acylamino or CF3O; Hal is Cl or Br; R1 and R1' are alkyl and n is 1 to 3 provided that if A is butyl, then (X)n-D- is not 4-chlorophenyl.
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