S1 Supporting Information For Synthesis and Cyclodehydration of Hydroxyphenols: A New Stereoselective Approach to 3-Aryl-2,3- Dihydrobenzofuranes Ferruccio Bertolini, Paolo Crotti, Valeria Di Bussolo, Franco Macchia, and Mauro Pineschi*. Dipartimento di Chimica Bioorganica e Biofarmacia, Università di Pisa, Via Bonanno 33, 56126 Pisa, Italy. pineschi@farm.unipi.it List of contents - - Indication of Material and Methods used (page S2). - Text giving all experimental procedures and characterization of new hydroxyphenols of type 3 (page S3-S11) - Text giving all experimental procedures and characterization of new 2,3- dihydrobenzofuranes of type 4 (cis) and 5 (trans) reported in the main text (page S11-S16) - Additional results of cyclodehydratation of hydroxyphenols to 2,3- dihydrobenzofuranes (Table 3) (page S17) - Text giving all experimental procedures and characterization of new compounds of type 4 and 5 not reported in the main text (page S18-S20)