Synthesis 2012(3): 439-445  
DOI: 10.1055/s-0031-1290066
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Expeditious Synthesis of Papilionaceous Molecules Containing Oligobenzofurans

Wen-Yu Chai, Er-Qun Yang, Yu-Long Zhang, An-Le Xie, Xiao-Ping Cao*
State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. of China
Fax: +86(931)8912582; e-Mail: caoxp@lzu.edu.cn;
Further Information

Publication History

Received 30 August 2011
Publication Date:
16 January 2012 (online)

Abstract

An efficient synthetic route to construct particular papilionaceous molecules containing oligobenzofurans is described. The key steps involved composing the backbone of the molecules by the Sonogashira cross-coupling reaction, followed by closing the benzofuran ring under alkaline conditions, and further aromatic cyclization of a multi-benzofuranyl precursor using ferric chloride as the oxidative reagent. Basic optical studies (UV-Vis, fluorescence, and fluorescence quantum yield) have been carried out on the synthesized molecules.