NEW MATERIAL:2-Hydroxy-3-(2-methyl-4-chlorophenyl)carbamoylbenzo>>a] carbazole.
USE: Useful as a coupler to obtain an azo compound usable as an electric charger generating substance in an electrophotographic sensitized material.
PREPARATION: Benzadilic acid(R) (2-hydroxy-3-carboxybenzo>>a]carbazole) is reacted with 2-methyl-4-chloroaniline in a solvent in the presence of a conden sation agent such as phosphorous trichloride under heating to give a compound shown by formula. In the operation, since the solvent is suitable for condensation reaction through dehydration and required to dissolved benzadilic acid in a certain degree, a solvent having ≥100°C boiling point, immisicible with water and having ≥1.20 Debye dipole moment, such as anisole, chlorobenzene or benzonitrile is preferable as the solvent. When azo pigment is produced by using a compound shown by the formula as a coupler and used as an electrophotographic sensitized material, a sensitized material having high sensitiv ity and high stability is obtained.
HIROSE HISAHIRO
ITAMI AKIHIKO
MATSUZAWA YUMI
