| 摘要 |
NEW MATERIAL:A compound shown by formula I. USE:A color former useful for pressure-sensitive copying paper, heat-sensitive copying paper, temperature-indicating material and photosensitive color recording sheet. PREPARATION:3,6-Dichlorofluoran shown by formula II is bonded to a compound shown by formula III in trichlorobenzene in the presence of Zinc chloride and zinc oxide at 200-210 deg.C to give 6-bis{(4-phenylaminophenyl)amino}fluoran shown by formula IV. This compound is reacted with iodobenzene in the presence of copper powder at 180-185 deg.C. After the reaction, the reaction mixture is extracted with toluene and toluene and excess iodobenzene are distilled away to give a compound shown by formula I. |
