Tetrahedron Vol. 67, Issue 45, 2011 Contents REPORT Aspartimide formation in peptide chemistry: occurrence, prevention strategies and the role of N-hydroxylamines pp 8595e8606 Ramon Subiros-Funosas, Ayman El-Faham * , Fernando Albericio * ARTICLES An efcient catalytic method for fulvene synthesis pp 8607e8614 Necdet Cos ¸ kun, Ihsan Erden* Contents lists available at SciVerse ScienceDirect Tetrahedron journal homepage: www.elsevier.com/locate/tet Tetrahedron 67 (2011) 8585e8593