慕尼黑工业大学Thorsten Bach教授

做客第211期化苑讲坛

报告题目：Chirality and Light: Enantioselective Catalysis of Photochemical Reactions

报 告 人：Thorsten Bach（德国科学院院士，慕尼黑工业大学教授）

报告时间：2016年10月18日上午10：00

报告地点：化学楼二楼一号会议室

报告人简介：

Thorsten Bach received his Ph.D. in 1991 from the University of Marburg with M. T. Reetz and did postdoctoral work with D. A. Evans at Harvard University. He moved to the University of Marburg as an associate professor in 1997 and was appointed to the Chair of Organic Chemistry I at the Technische Universität München (TUM) in 2000 and has remained there ever since. He has published over 250 papers in international journals, including Nature, Science, Chem. Rev., Angew. Chem. Int. Ed., and J. Am. Chem. Soc.

报告内容：

[2+2] Photocycloaddition reactions belong undisputedly to the most important reaction classes in photochemistry. We have studied catalytic enantioselective reaction courses in [2+2] photocycloaddition reactions via a triplet energy transfer by hydrogen-bonding chiral catalysts. A chiral xanthone turned out to be an efficient organocatalyst providing good turnoverand high enantioselectivities in [2+2] photocycloaddition reactions while a related chiral thioxanthone allowed for enantioselective reactions promoted by visible light. Apart from this approach, we have also looked into the possibility of Lewis-acid mediated enantioselectivity in photochemical reactions. Chiral Lewis acids were developed for [2+2] photocycloaddition reactions and are currently being further explored.