Condensation of naphthalenediols with benzene in the presence of aluminum bromide: an efficient synthesis of 5-, 6-, and 7-hydroxy-4-phenyl-1- and 2-tetralones
作者:Konstantin Yu. Koltunov
DOI:10.1016/j.tetlet.2008.04.062
日期:2008.6
Isomeric 1,5-, 1,6-, 1,7-, 2,6-, and 2,7-naphthalenediols react smoothly with benzene at room temperature in the presence of an excess of aluminum bromide to give 5-, 6-, and 7-hydroxy-4-phenyl-1-tetralones and 5- and 6-hydroxy-4-phenyl-2-tetralones, respectively. The mechanism of these reactions is interpreted in terms of key di- or tri-cationic (superelectrophilic) intermediates.
在室温下,在过量溴化铝的存在下,异构的1,5-,1,6-,1,7-,2,6-和2,7-萘二醇与苯平稳反应,生成5-,6-分别是7-羟基-4-苯基-1-四氢萘酮和5-羟基和6-羟基-4-苯基-2-四氢萘酮。这些反应的机理可以通过关键的双阳离子或三阳离子(超亲电子)中间体来解释。