应功能有机分子化学国家重点实验室院邀请，法国巴黎综合理工大学（École Polytechnique）Samir Zard教授来我校进行学术交流并作学术报告，欢迎广大师生参加。
报告题目：Reversible Reservoirs for Radicals. A Powerful Strategy for the Construction of Carbon-Carbon Bonds
Professor Zard received his doctorate under the supervision of Professor Sir Derek Barton in 1983 at the Institut de Chimie des Substances Naturelles (ICSN) at Gif-sur-Yvette, France. He currently holds the positions of Director of Research (Exceptional Class) in the CNRS and part-time Professor at École Polytechnique. His main research concerns the study and development of new reactions and processes. In addition to a number of academic awards, Professor Zard received the Croix de Chevalier de la Légion d’Honneur in 2007.
Radical reactions offer many of the properties desired by synthetic organic chemists, in terms of variety, mildness of conditions, and a selectivity that is often complementary to that of ionic chemistry, making many protection steps superfluous. Over the years, we have shown that xanthates and related thiocarbonylthio derivatives allow the generation of radicals under conditions where the radicals possess a considerably increased effective lifetime even in a concentrated medium. Intermolecular additions to un-activated alkenes, as well as a variety of reputedly difficult radical transformations can now be easily accomplished. No metals, heavy or otherwise, are required, and the starting materials and reagents are cheap and readily available. Complex, densely functionalized structures can be constructed in a convergent, modular fashion. In the course of our study of the scope and limitations of this chemistry, we have uncovered a few surprising transformations. In this talk, recent results and some mechanistic aspects will be presented and discussed briefly.