Palladium-Catalyzed C–H Homocoupling of Furans and Thiophenes Using Oxygen as the Oxidant
作者:Na-Na Li、Yan-Lei Zhang、Shuai Mao、Ya-Ru Gao、Dong-Dong Guo、Yong-Qiang Wang
DOI:10.1021/ol501019y
日期:2014.5.16
A general and efficient palladium-catalyzedintermolecular direct C–H homocoupling of furans and thiophenes has been developed. The reaction is characterized by using molecular oxygen as the sole oxidant and complete C5-position regioselectivity. Both C2- and C3-substituted furans or thiophenes are appropriate substrates. The approach provides a straightforward, facile, and economical route to bifurans