Disazo compound, method for preparing the same, and electrophotographic element containing the same for use in electrophotography

Claim 1

A photosensitive material for use in electrophotography, comprising: an electroconductive substrate; a photosensitive layer on said substrate, said photosensitive layer containing a disazo compound having the formula (V), ##STR209## wherein A is selected from the group consisting of radicals of the formulas (VI), (VII), (VIII), (IX), (X), (XI) and (XII), ##STR210## wherein X 1 is --OH, ##STR211## or --NHSO 2 --R 3 in which R 1 and R 2 are hydrogen, alkyl or substituted alkyl, and R 3 is alkyl, substituted alkyl, aryl or substituted aryl; Y 1 is hydrogen, halogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, carboxyl, sulfo, sulfamoyl, substituted sulfamoyl, ##STR212## in which R 4 is hydrogen, alkyl, substituted alkyl, phenyl or substituted phenyl, Y 2 is cyclic hydrocarbon, substituted cyclic hydrocarbon, heterocycle or substituted heterocycle, R 5 is cyclic hydrocarbon, substituted cyclic hydrocarbon, heterocycle, substituted heterocycle, styryl, or substituted styryl, and R 6 is hydrogen, alkyl, substituted alkyl, phenyl, substituted phenyl, or ##STR213## forms a ring, Z is a cyclic hydrocarbon, substituted cyclic hydrocarbon, heterocycle or substituted heterocycle; n is an integer of 1 or 2; m is an integer of 1 or 2; ##STR214## in which R 7 is hydrocarbon or substituted hydrocarbon group, and X 1 is the same as defined above; ##STR215## in which R 8 is alkyl, carbamoyl, carboxyl or ester thereof, and Ar 1 is a cyclic hydrocarbon or substituted cyclic hydrocarbon, and X 1 is the same as defined above.