Facile Synthesis of Naphthothiophenone Derivatives and Anthradithiophenedione via Friedel–Crafts Acylation and Their Fundamental Properties

Facile synthetic methods for constructing naphthothiophenone and its π-extended derivatives were developed. Naphthothiophenone and anthradithiophenedione were synthesized by the S-acylation of thiol to form chlorothioformate and subsequent Friedel–Crafts acylation. A bromination reaction of naphthothiophenone and its application to Suzuki–Miyaura cross-coupling was also carried out. The fundamental physical properties of these compounds were also investigated.