Copper-Mediated Regioselective Homocoupling of Thiophenes and Indoles via Directed C–H Cleavage
摘要:
We have developed a copper-mediated regioselective homocoupling reaction of thiophenes and indoles via functional-group-directed C H cleavage to afford the corresponding bisthiophenes (bithiophenes) and bisindoles directly. The copper-based system can provide a concise and precious-metal-free access to the above heterocyclic cores of fundamental importance in material and pharmaceutical chemistry.