Convenient Synthesis of Benzo[<i>b</i>]thiophene-5,6-dicarboximide Derivatives and Their Photophysical Properties

Abstract

Phosphine-assisted annulation of thiophene-2,3-dicarbaldehyde with N-substituted maleimides provided the N-substituted benzo[b]thiophene-5,6-dicarboximides in good to high yields. Introduction of cyano and aryl groups to the thiophene moiety of the N-cyclohexyl product was achieved by metal-catalyzed coupling reactions via its bromo derivative. Photophysical properties of the products were also reported.

Synthesis and Physical Properties of Novel 7, 12-Diaryl-<i>N</i>-phenylbenzo[<i>k</i>]fluoranthene-9, 10-dicarbox- imides

“…[9][10] These findings have prompted organic chemists to develop various new synthetic methods access to dicarboximide compounds. [14][15][16][17] We recently developed an efficient annulation between arene-1, 2-dicarbaldehydes and maleimides [18][19][20][21] by improving the previously reported Haddadin's result. [22] As shown in Fig.…”