Convenient and Efficient Synthesis of 1,1‐Bis‐(4‐alkylthiophenyl)‐1‐alkenes via Tandem Friedel–Crafts Acylation and Alkylation of Sulfides and Acyl Chlorides

Abstract

1,1‐Bis(4‐alkylthiophenyl)‐1‐alkenes were conveniently and efficiently prepared from alkyl phenyl sulfides and acyl chlorides via a tandem Friedel–Crafts acylation and alkylation in the presence of anhydrous aluminum chloride. The scope, limitation, and mechanism of the tandem reaction were also discussed.

Keywords:

• Acylation
• alkene
• alkylation
• Friedel–Crafts reaction
• sulfide
• tandem reaction

Acknowledgment

The project was supported partly by National Natural Science Foundation of China (Nos. 20272002 and 20472005), Ministry of Education of P.R. China (EYTP), and Peking University (President Grant).