| 摘要 |
NEW MATERIAL:A compound expressed by formula I {R1 and R2 are H, (substituted)alkyl or R1 and R2 mutually link to form a 5--6-membered ring; R3-R6 are H, halogen, (substituted)alkyl, (substituted)alkoxy or (substituted) amide; R7 and R8 are H, (substituted)alkyl, (substituted)aryl or R11-CO- [R11 is H, (substituted)alkyl, etc.], etc., R9 and R10 are monofunctional substituent group; n and mare 0-4}. EXAMPLE:A compound expressed by formula II. USE:An image medium in photographic heat transfer processes, ink jet methods, color electrophotographies, printings, etc., having excellent absorption characteristics as a cyan coloring matter and light, heat resistance, etc., with hardly any secondary absorption. PREPARATION:A compound expressed by formula III and a p-phenylenediamine based compound expressed by formula IV are subjected to oxidation coupling in the presence of an oxidizing agent. |
