| Abstract
| - A class of 3,4-diaryl-2,5-dibromothiophenes (1b−5b) was synthesized by a one-pot reaction of 3,4-diaryl-2,5-dihydrothiophenes with Br2 reagent in excellent yield (83−92%). It was found that Br2 performeda double function (oxidation and bromination) during the conversion of 3,4-diaryl-2,5-dihydrothiophenesto 3,4-diaryl-2,5-dibromothiophenes. The application of 3,4-diaryl-2,5-dibromothiophenes used as buildingblocks was also investigated. Employing 3,4-diphenyl-2,5-dibromothiophene (1b) as a template, a classof 2,3,4,5-tetraarylthiophenes was prepared by the Suzuki coupling reaction. This provided a new andsimple approach to the preparation of 2,3,4,5-tetraarylthiophenes.
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