title: Short and efficient synthesis of coronene derivatives via ruthenium-catalyzed benzannulation protocol.
abstract: [reaction: see text] TpRuPPh3(CH3CN)2PF6 (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 %).
authors.affiliation: Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC 30043.
authors.forename: Hung-Chin
authors.initials: HC
authors.lastname: Shen
authors.forename: Jhih-Meng
authors.initials: JM
authors.lastname: Tang
authors.forename: Hsu-Kai
authors.initials: HK
authors.lastname: Chang
authors.forename: Chia-Wei
authors.initials: CW
authors.lastname: Yang
authors.forename: Rai-Shung
authors.initials: RS
authors.lastname: Liu