Catalytic Action of Azolium Salts. III. Aroylation of N-Phenylbenzimidoyl Chlorides with Aromatic Aldehydes in the Presence of 1,3-Dimethylimidazolium Iodide.
作者:Akira MIYASHITA、Hideaki MATSUDA、Takeo HIGASHINO
DOI:10.1248/cpb.40.2627
日期:——
N-Phenylbenzimidoyl chlorides 10, 11, 12, 13, and 14 were aroylated with aromatic aldehydes 9 in the presence of a catalytic amount of 1, 3-dimethylimidazolium iodide (1) to afford N-(α-aroylbenzylidene)anilines 15, 16, 17, 18, and 19. Treatment of the resulting N-(α-aroylbenzylidene)anilines (15-19) with diluted hydrochloric acid (HCl) produced the benzils 20, 21, 22, 23, and 24 in excellent yields.
在一定量的 1,3-二甲基碘化咪唑鎓(1)催化下,N-苯基苯甲酰基氯 10、11、12、13 和 14 与芳香醛 9 发生芳基化反应,生成 N-(α-芳酰基亚苄基)苯胺 15、16、17、18 和 19。用稀盐酸 (HCl) 处理得到的 N-(α-甲酰基亚苄基)苯胺 (15-19),可以得到苯并类化合物 20、21、22、23 和 24,收率极高。