慕尼黑工業大學Thorsten Bach教授
做客第211期化苑講壇
報告題目：Chirality and Light: Enantioselective Catalysis of Photochemical Reactions
報 告 人：Thorsten Bach（德國科學院院士，慕尼黑工業大學教授）
報告時間：2016年10月18日上午10：00
報告地點：化學樓二樓一號會議室
報告人簡介：
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.
報告內容：
[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.
