Reactivity of 3,6-dimethoxy-3,6-dimethylcyclohexa-1,4-diene (part 2). Regioselective arylation of electron-rich aromatic compounds
作者:Francisco Alonso、Miguel Yus
DOI:10.1016/s0040-4020(01)80926-1
日期:1991.1
The reaction of 3,6-dimethoxy-3,6-dimethylcyclohexa-1,4-diene (1) with electron-rich heterocycles (furan, thiophene, pyrrole, 2-methyl-furan indole) and 1,3,5-trimethoxybenzene in the presence of catalytic amounts of zinc dichloride or concentrated sulftiric acid leads to the corresponding 2-aryl substituted p-xylenes4 in good yields and in a regioselective manner.
3,6-二甲氧基-3,6-二甲基环己-1,4-二烯(1)与富电子杂环(呋喃,噻吩,吡咯,2-甲基呋喃吲哚)和1,3,5-三甲氧基苯的反应在催化量的二氯化锌或浓硫酸存在下,以良好的产率和区域选择性的方式得到相应的2-芳基取代的对二甲苯4。