|Speaker||Prof. Sunkyu Han|
|Date||Thursday 2 June 2016|
|Venue||#331, Asan Hall, College of Science|
Total Syntheses of Complex Alkaloids Inspired by Biosynthetic Hypotheses
One of the major goals of synthetic organic chemists is a controlled and rapid generation of complex molecules with high functional impact. Natural products, secondary metabolites produced by living organisms, can serve as outstanding platforms to achieve this goal. Structural complexity of natural products can spark the development of novel synthetic approaches and their biological activity can boost the discovery of new therapeutics.
Biological systems have developed enzymes for the formation of bonds that can streamline the assembly of secondary metabolites. We are interested in identifying those key bonds and developing chemical tools for the formation of those bonds, which would result in efficient total syntheses. Herein, I present the total syntheses of agelastatins,1 trigonoliimines2 and oxa-azaspirononedione containing natural products as examples of the biosynthetic hypotheses-guided synthetic approaches.
1. Han, S.; Siegel, D. S.; Morrison, K. C.; Hergenrother, P. J.; Movassaghi, M. “Synthesis and Anticancer Activity of all Known (–)-Agelastatin Alkaloids.” J. Org. Chem. 2013, 78, 11970.
2. Han, S.; Morrison, K.; Hergenrother, P. J.; Movassaghi, M. “Total Synthesis, Stereochemical Assignment, and Biological Activity of All Known (–)-Trigonoliimines.” J. Org. Chem. 2014, 79, 473.
Prof. Sunkyu Han
Department of Chemistry, KAIST, Republic of Korea
|Notice||Fall semester 2017 Seminar Schedule||-||-|
|48||7th Jilin-Korea-Waseda Alliance Annual Symposium||-||August 17 ~ 19, 2017|
|47||Fall semester 2016 Seminar Schedule||-||-|
|46||Spring semester 2017 Seminar Schedule||-||-|
|45||[Fri. 13 Oct. 2017] Dr. J. Nathan Hohman/The Molecular Foundry, Lawrence Berkeley National Laboratory, California, USA||Dr. J. Nathan Hohman||Fri. 13 Oct. 2017|
|44||[Fri. 16 Jun. 2017] Prof. Martin Thuo/Department of Materials Science and Engineering, Iowa State University, USA||Prof. Martin Thuo||Fri. 16 Jun. 2017|
|43||[Fri. 17 Jun. 2016] Prof. Jianwei Sun/Remote Control in Brønsted Acid Catalysis: New Strategies for the Synthesis of Chiral Building Blocks and Medium Rings||Prof. Jianwei Sun||Friday 17 June 2016|
|42||[Fri. 17 Mar. 2017] 9th RINS Symposium||-||Fri. 17 Mar. 2017|
|41||[Fri. 30 Oct. 2017] Prof. Igor Rodin/Department of Chemistry, Moscow State University, Moscow, Russia||Prof. Igor Rodin||Fri. 30 Oct. 201|
|40||[January 24, 2018] Electro-Optic Organic THz Wave Sources||Prof. O-Pil Kwon(Ajou University)||January 24, 2018 (Wednesday)|
|39||[Mon. 13 Oct. 2016] Prof. Amir H. Hoveyda/Multicomponent Catalytic Synthesis of Organoboron Compounds for Scalable Natural Product Synthesis||Prof. Amir H. Hoveyda||Monday 13 October 2016|
|38||[Mon. 16 Oct. 2017] Prof. Kirk S. Schanze/Department of Chemistry, University of Texas at San Antonio, Texas, USA||Prof. Kirk S. Schanze||Mon. 16 Oct. 2017|
|37||[Mon. 9 Jan. 2017] Prof. Sungwook Woo/Wyss Institute for Biologically Inspired Engineering, Harvard University, USA||Prof. Sungwook Woo||Mon. 9 Jan. 2017|
|36||[November 14, 2017] Zero-Point Energy, Fluctuations, and Dissipation : A (Mostly) Quantum-Optical Perspective||Prof. Milonni, Peter||November 14, 2017|
|35||[October 10, 2017] Novel Terahertz Spectroscopies||Director Mischa Bonn||Tue, October 10, 2017|
|34||[October 25, 2017] Ultrafast electron microscopy: applications in chemical and materials sciences||Dr. Byung-Kuk Yoo||October 25, 2017|
|33||[October 31, 2017] New ways of vision: Protein structures in translational medicine and business development, my experience||Prof. Robert Huber(1988 Nobel Prize in Chemistry)||October 31, 2017|
|32||[Thu. 1 Dec. 2016] Prof. Sang-Yong Ju/Highly Pure Carbon Nanotubes sorted by a Flavin for Thin Film Transistor Applications||Prof. Sang-Yong Ju||Thursday 1 December 2016|
|31||[Thu. 1 Jun. 2017] Prof. Jong-Man Kim/Department of Chemical Engineering, Hanyang University, Seoul, Korea||Prof. Jong-Man Kim||Thu. 1 Jun. 2017|
|30||[Thu. 11 May. 2017] Prof. Andreas Heinrich/IBS Research, Center for Quantum Nanoscience, Seoul, South Korea||Prof. Andreas Heinrich||Thu. 11 May. 2017|
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