K. Lu, T. P. Luo, Z. Xiang, Z. J. You, R. Fathi, J. H. Chen*, Z. Yang*

J. Comb. Chem., 2005, 7, 958.

A one-pot synthesis of diverse benzofurans and indoles from readily available starting materials was achieved via the sequential Ugi four-component reaction, intramolecular Diels−Alder reaction, and oxidative aromatization.