A one-pot coupling-addition-cyclocondensation sequence (CACS) to 2-substituted 3-acylpyrroles initiated by a copper-free alkynylation

A novel three-component synthesis of 2-substituted 3-acylpyrroles can be initiated by a copper-free Pd-catalyzed alkynylation in a one-pot fashion. The reaction sequence proceeds under mild reaction conditions and in moderate to good yields with a broad scope of diversity.