Non-conventional paths in electrophilic aromatic reactions. Part VI. Chlorination of 3,5-dichloro-2,4,6-trimethylanisole and related compounds
作者:Giancarlo Antinori、Enrico Baciocchi、Gabriello Illuminati
DOI:10.1039/j29690000373
日期:——
The electrophilic chlorination of some hexa-substituted benzenes has been investigated. Both 3,5-dichloro-2,4,6-trimethylanisole and the parent phenol lead to cyclohexadienone formation. The isomer composition of the product depends on the solvent as well as on the substrate. In trifluoroacetic acid the anisole derivative probably undergoes primary attack of the electrophile on the 4-position. The
已经研究了一些六取代苯的亲电子氯化反应。3,5-二氯-2,4,6-三甲基苯甲醚和母体酚都导致形成环己二酮。产品的异构体组成取决于溶剂以及底物。在三氟乙酸中,苯甲醚衍生物可能在4位上经历亲电试剂的初次攻击。反应动力学表明,向中间体溶剂的甲基转移是在中间苯甲醛离子缓慢形成之后的一个快速步骤中发生的。2,4,6-三氯-3,5-二甲基-1-R-苯(R发现Me或OMe是高度不活泼的底物。讨论了这些结果与甲基苯的亲电子侧链氯化反应的机理以及与某些特定的甲硅烷基的脱甲基反应有关的含义。