Highly Selective Synthesis of 1,3-Enynes, Pyrroles, and Furans by Manganese(I)-Catalyzed C–H Activation

A highly selective Mn(I)-catalyzed alkenylation of arenes and heteroarenes with 1,3-diynes is described. The reported transformation overcomes regio-, chemo-, and stereoselectivity challenges associated with the use of these coupling partners. Both symmetrical and unsymmetrical diynes can be applied in this protocol, affording single isomers not only in the synthesis of 1,3-enynes but also in the one-step preparation of pyrroles and furans. This...