Short and efficient synthesis of coronene derivatives via ruthenium-catalyzed benzannulation protocol

[[abstract]]TpRuPPh(3)(CH3CN)(2)PF6 (3 mol %) was very active in catalytic benzannulation of 1-phenyl-2-ethynylbenzenes in dichloroethane (60 degrees C, 36 h) to afford phenanthrene in 95% yield. This method is applicable to the synthesis of various polycyclic aromatic hydrocarbons via two- and four-fold benzannulations, including various substituted coronene derivatives (53-86% yields) using this catalyst at a moderate loading (10 mol %).[[fileno]]2010327010128[[department]]化學