Novel fluoran compounds and production and use thereof
申请人:TAOKA CHEMICAL CO., LTD
公开号:EP0176161A1
公开(公告)日:1986-04-02
A fluoran compound of the formula:
wherein R1 is C3-C13 secondary alkyl with respect to the carbon atom bonded to the nitrogen atpm, R2 is C1-C4 primary alkyl, C3-C4 alkenyl or C3-C4 alkoxyalkyl, R3 and R4 are, same or different, hydrogen, halogen, C1-C4 alkyl or trifluoromethyl, R5 is hydrogen, methyl, ethyl or halogen, which is useful as a color former and develops deep black with a developer.
Process for the preparation of diphenlyamine or nucleus-substituted derivative thereof
申请人:MITSUI TOATSU CHEMICALS, INC.
公开号:EP0803496A1
公开(公告)日:1997-10-29
Described are processes for the preparation of diphenylamine or a nucleus-substituted derivative thereof, which comprise, upon feeding into a reaction system a phenol compound and reacting in the reaction system a cyclohexanone compound with an aniline compound in the presence of a hydrogen transfer catalyst and a catalytic amount of the cyclohexanone compound corresponding to the phenol compound while using the phenol compound as a hydrogen acceptor and forming the cyclohexanone compound in the reaction system, employing a hydroxide, carbonate or bicarbonate of an alkali metal and/or an alkaline earth metal when the hydrogen transfer catalyst is one of noble metals of Group VIII of the periodic table, respectively.