An ICIQ publication in the field of gold catalysis has been distinguished as a Hot Paper in the Journal of the American Chemical Society. In the article Intramolecular [4 + 2] cycloadditions of 1,3-enynes or arylalkynes with alkenes with highly reactive cationic phosphine Au(I) complexes (J. Am. Chem. Soc. 2005, 127, 6178-6179), co-authored by Cristina Nieto-Oberhuber, Salomé López and Antonio M. Echavarren, the authors have found novel reactivity of substituted 1,6-enynes by using highly alkynophilic Au(I) complexes with biphenyl phosphines as ligands and best results are obtained with the complex which bears an electron-rich aryl ring. While thermal intramolecular [4 + 2] cycloadditions (dehydro-Diels-Alder reactions) of enynes with alkenes only take place at high temperatures, these transformations proceed with Au(I) catalysts under mild conditions to provide bi- or tricyclic ring systems.