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Recent Advances for the Selective Synthesis of Heterocycles. Boshun Wan ( 万伯顺 ) E-mail: bswan@dicp.ac.cn. Heterocycles for Sustainable Chemistry. Natural products. Pharmaceuticals. Heterocycles. Chemicals for R&D. Polymer Materials. Top 100 Brand Name Drugs by US Retail Sales in 2010.
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Recent Advances for the Selective Synthesis of Heterocycles Boshun Wan (万伯顺) E-mail: bswan@dicp.ac.cn
Heterocycles for Sustainable Chemistry Natural products Pharmaceuticals Heterocycles Chemicals for R&D Polymer Materials
Top 100 Brand Name Drugs by US Retail Sales in 2010 Heterocycles: ~50%; Pyridine/Pyrrole: ~10% http://cbc.arizona.edu/njardarson/group/top-pharmaceuticals-poster
Developed Catalytic Systems Louie, J. Saá, C. Vollhardt Takahashi, T. “CpCo” “Ni/NHC” “Zr/Ni” Generic description of the 6 factors Metal-catalyzed [2 + 2 + 2] cycloaddition Urabe, H. Tanaka, K. “Ti(OiPr)4/iPrMgCl” “Rh/P-P” Yamamoto, Y. Guerchais, V. Saá, C. Zenneck, U. “Cp*Ru” “Fe(0)” “Fe(+I)” (a) Varela, J. A.; Saá, C. Chem. Rev. 2003, 103, 3787. (b) Chopade, P. R.; Louie, J. Adv. Synth. Catal. 2006, 348, 2307. (c) Heller, B.; Hapke, M. Chem. Soc. Rev. 2007, 36, 1085. (d) Varela, J. A.; Saá, C. Synlett2008, 2571. (e) Wang, C. X.; Li, X. C.; Xu, F.; Wan, B. S. Prog. Chem. 2010, 22, 610.
Why Iron? US$ per mol Iron(I) complex 2011 Iron(0) complex Iron (0.02 US$/mol)
Problems and Solutions Three crucial problems: 1. Low-valent metal 2. Substrate Coordination & Product Dissociation 3. Benzene byproducts
Cycloaddition of Diynes and Unactivated Nitriles (Continued)
Cycloaddition of Tetrayne All-intramolecular Cycloaddition
Iron-Catalyzed Cycloaddition With Wang, C. X.Angew. Chem. Int. Ed. 2011, 50, 7162
Ruthenium-catalyzed [2+2+2] Cycloaddition in Pure Water WithXu, F.ChemSusChem. 2012, 5, 854 (IF 6.325)
Mechanism Study "α" Migration
Mechanism Study Crossover Experiment anticipated products new products
Mechanism Study "β" Migration
Crossover Experiment Competition Experiment
Highly Regioselective Sulfonyl-Group Migration Reactions With Xin, X. Y.Angew. Chem. Int. Ed. 2012, 51, 1693.