Syntheses of Thiophenes – Recent Advances

Abstract Thiophene, as an important sulfur‐containing heterocyclic, is widely used in pharmaceuticals, functional materials, and natural products. Furthermore, thiophene is of great interest to synthetic chemists due to its diverse reactivities. Over the past few decades, many synthetic strategies are developed for functionalized thiophenes. Several reviews have been reported. However, there is no review on thiophene synthesis summarized based on the sulfur sources. The current review envisioned to summary the synthesis methods for thiophene with the respect of sulfur sources and give support for choose the appropriate tools to obtain thiophene substrates.