S1 SUPPORTING INFORMATION Zn(OTf) 2 Promoted Rearrangement of 1,2- Cyclopropanated Sugars with Amines: A Convenient Method for the Synthesis of 3-Poly- hydroxyalkyl- substituted Pyrrole Derivatives Xudong Shen a, c Jianhui Xia b , Peng Liang a, c , Xiaofeng Ma a, c , Wei Jiao a and Huawu Shao* a a Natural Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu, China. b National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang, Jiangxi, China c University of Chinese Academy of Science, China. *Correspondence author: E-mail: [email protected] Fax: (+86) 28-82890288 Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry. This journal is © The Royal Society of Chemistry 2015