| 摘要 |
NEW MATERIAL:A 2,4,5-triphenylimidazole compound having 3,4- methylenedioxyphenyl groups at 4- and 5-sites and expressed by formula I {A is phenyl compound of formula II (R1-R5 are H, lower alkyl, lower alkoxy, F, Cl, Br, trifluoromethyl or trichloromethyl)]. EXAMPLE:2-(2-Chlorophenyl)-4,5-bis(3,4-methylenedioxyphenyl)-imidazole. USE:Chlorine source for photographic image-forming composition and intermediate for pharmaceuticals and agricultural chemicals. An intermediate for 2,4,5- triphenylimidazole dimer useful as a radical generator, photo-oxidization agent of photoresist, PS printing plate, proofing material, etc., sunglasses, window glass, etc. PREPARATION:A solution of piperyl, glacial acetic acid and ammonium acetate is added with o-chlorobenzaldehyde, refluxed and added with water to obtain the objective compound as precipitate. |
