The Formation of 1-Aryl-Substituted Naphthalenes by an Unusual Cyclization of Arylethynes Catalyzed by Ruthenium and Rhodium Porphyrins
作者:Elfituri Elakkari、Barbara Floris、Pierluca Galloni、Pietro Tagliatesta
DOI:10.1002/ejoc.200400746
日期:2005.3
The dimerization of arylethynes to give 1-aryl-substituted naphthalenes through catalysis by rhodium and ruthenium porphyrins has been investigated. When performed at temperatures above 130 °C, this reaction affords a mixture of triarylbenzenes and 1-aryl-substituted naphthalenes. The yields of naphthalene derivatives range from low to high, depending on the temperature and the phenyl substituents
已经研究了通过铑和钌卟啉的催化,芳基乙炔二聚生成1-芳基取代的萘。当在 130 °C 以上的温度下进行时,该反应会得到三芳基苯和 1-芳基取代的萘的混合物。萘衍生物的产率从低到高,取决于温度和苯基取代基。初始化合物的浓度会影响反应的选择性:1,2-二氯苯中的二聚/三聚比率随着浓度的降低而增加。反应机理由催化剂配体的特殊结构决定,并涉及金属卟啉的亚乙烯基中间体的形成。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)