Facile Synthesis of Rubicenes by Scholl ReactionThis work was partly supported by JSPS KAKENHI for Scientific Research (C) (26410060).
Received: 26 July 2017
Accepted after revision: 28 August 2017
25 September 2017 (eFirst)
The treatment of 9,10-diphenylanthracenes with DDQ in the presence of TfOH readily gave the corresponding rubicene derivatives in good yields. The effects of oxidant, acid, substituent, and other conditions are discussed. This protocol involving the Scholl reaction is convenient for the preparation of some rubicene derivatives from conventional starting materials.