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

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.sub.1 is --OH, ##STR211## or --NHSO.sub.2 --R.sub.3 in which R.sub.1 and R.sub.2 are hydrogen, alkyl or substituted alkyl, and R.sub.3 is alkyl, substituted alkyl, aryl or substituted aryl;
• Y.sub.1 is hydrogen, halogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, carboxyl, sulfo, sulfamoyl, substituted sulfamoyl, ##STR212## in which R.sub.4 is hydrogen, alkyl, substituted alkyl, phenyl or substituted phenyl, Y.sub.2 is cyclic hydrocarbon, substituted cyclic hydrocarbon, heterocycle or substituted heterocycle, R.sub.5 is cyclic hydrocarbon, substituted cyclic hydrocarbon, heterocycle, substituted heterocycle, styryl, or substituted styryl, and R.sub.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.sub.7 is hydrocarbon or substituted hydrocarbon group, and X.sub.1 is the same as defined above;
• ##STR215## in which R.sub.8 is alkyl, carbamoyl, carboxyl or ester thereof, and Ar.sub.1 is a cyclic hydrocarbon or substituted cyclic hydrocarbon, and X.sub.1 is the same as defined above.