| 摘要 |
NEW MATERIAL:A squarylium compound of formula I (R is H, F, methyl). USE:An organic photoconductive material such as an electrophotographic photoreceptor. It is used as a photoconductive substance for the electric charge- generating layer in the photosensitive material which is composed of the charge- generating layer and the charge-transferring layer. PREPARATION:For example, the Friedel-Craft reaction between 3,4-dichloro-3- cyclobutene-1,2-dione of formula II and an aniline derivative of formula III is carried out in the presence of a catalyst such as AlCl3 in a solvent at 0-80 deg.C for 30min-20hr. The product of formula IV is hydrolyzed in a water-acetic acid mixed solvent under reflux into a compound of formula V. The compound is heated together with a 3-dimethylaminophenol of formula VI under reflux in a solvent or under reduced pressure as the water formed is removed to effect condensation reaction at 80-140 deg.C for 2-5hr whereby the compound of formula I of high purity is obtained. |
