1 Supplementary Material (ESI) for Organic & Biomolecular Chemistry This journal is (c) The Royal Society of Chemistry 2010 Supporting Information Chiral Sulfoxides as Activators of Allyl Trichlorosilanes in the Stereoselective Allylation of Aldehydes. Vincenzo De Sio, Antonio Massa,* Arrigo Scettri * Dipartimento di Chimica, Università di Salerno, Via Ponte Don Melillo, 84084 Fisciano, Salerno, Italy scettri@unisa.it