Facile access to benzofuran-based bis-stilbene for organic laser dyes

Abstract

A concise and efficient synthetic protocol for the synthesis of furan-based bis-stilbene derivatives (BPBFCz1) was described, which is a very promising organic laser dye. Starting with 4,4’-diethynylbiphenyl, BPBFCz1 was prepared with a total yield of 40% through a three-step classical reaction of Sonogashira Coupling, intramolecular cyclization of 2-alkynyl phenol, and Buchwald Hartwig cross-coupling. The crystal structure of BPBFCz1 was presented for the first time. The synthesis strategy was applied to the synthesis of other three materials with similar structure and the yields of 28.6–36.6% were obtained.

GRAPHICAL ABSTRACT

Key Words:

• Organic laser dyes
• organic gain media
• bis-stilbene
• benzofuran
• sonogashira coupling

Additional information

Funding

The authors gratefully acknowledge financial support from The Key Laboratory of Coal to Ethylene Glycol and Its Related Technology; State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences.