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Viewing upcoming talks in: ScotCHEM Colloquia
Speaker: Prof Kyoko Nozaki (University of Tokyo)
Homogeneous Catalysis for Organic Synthesis and Polymer Synthesis Kyoko Nozaki Department of Chemistry and Biotechnology, The University of Tokyo Hongo 7 -3-1, Bunkyo -ku , Tokyo 113 -8656 Japan Email: nozaki @ chembio.t.u -tokyo.ac.jp
In order to avoid the formation of undesired by -products, development of catalytic reactions affording the desired compound as a sole product is highly desired. We have developed catalysts applicable for small molecules and macromolecules. The former is recognized as organic synthesis which finds its applications as intermediates for fine chemicals while the latter are widely used in bulk material synthesis. The catalysts we studied are organometallic complexes consist of metals with catalytic activities and ligands with ability to control the reactions. Three examples are shown as below. (1) Asymmetric synthesis of chir al polymers 1,2 Two examples are presented for the synthesis of optically active polymers with main -chain chirality from achiral monomers using chiral metal -complexes as catalysts. Asymmetric alternating copolymerization of α-olefins with carbon monoxide provided optically active polyketones with high enantioselectivity .
(2) Copolymeriz ation of ethylene or propylene with polar vinyl monomers 3,4,5 Aiming to expand the application range of polyolefins, metal -catalyzed copolymerization of olefins with easily available polar vinyl monomers has been intensively studied in the last decades. Here in this presentation, our contribution to the development o f coordination –insertion copolymerization of ethylene or propylene with polar vinyl monomers by palladium catalysts will be presented.
(3) Organic synthesis with polymerization catalyst 6 Propylene polymerization catalyst was successfully used for the total s ynthesis of a natural product endowed with deoxypropionate unit.
References  Review and accounts articles: (a) Nozaki,K. J. Polym. Sci., Part A: Polym. Chem ., 2004 , 42 , 215 - 221. (b) Nozaki, K. Pure Appl. Chem ., 2004 , 76 , 541 -546.  Recent publicatio ns: Nakamura, A.; Kageyama, T.; Goto, H.; Carrow, B. P.; Ito, S.; Nozaki, K. J. Am. Chem. Soc ., 2012 , 134 , 12366 -12369.  Review and accounts articles: (a) Nakamura, A.; Anselment, T. M. J.; Claverie , J.; Goodall, B.; Jordan, R. F.; Mecking, S.: Rieger, B.; Sen, A.; van Leeuwen, P. W. N. M.; Nozaki, K. Acc. Che. Res . 2013 , 46 , 1438 -1449. (b) Nakamura, A.; Ito, S.; Nozaki, K. Chem. Rev ., 2009 , 109 , 5215 - 5244. (c) Carrow, B. P.; Nozaki, K. Macromolecul es , 2014 , 47 , 2541 -2555  Recent publications: (a) Carrow, B. P.; Nozaki, K. J. Am. Chem. Soc. 2012 , 134 , 8802 –8805. (b) Nakano, R.; Nozaki, K. J. Am. Chem. Soc ., 2015 , 137 , 10934 -10937. (c) Ota, Y.; Ito, S.; Kobayashi, M.; Kitade, S.; Sakata, K.; Tayano, T.; Nozaki, K. Angew. Chem. Int. Ed ., 2016 , 55 , 7505 -7509. (d) H. Yasuda, R. Nakano, S. Ito, K. Nozaki , J. Am. Chem. Soc. 2018 , 140 , 1876 – 1883 .  X. Wang, K. Nozaki , J. Am. Chem. Soc. , 2018 , 140 , 15635 –15640 .  (a) Ota, Y.; Murayama, T.; Nozaki, K. Proc. Natl. Acad. Sci. USA , 2016 , 113 , 2857 -2861. (b) T. Murayama, K. Nozaki , Angew. Chem. Int. Ed. , 2018 , 57 , 11394 –11398 . Download PDF
On: October 16, 2019 From: 15h30 To: 16h30View talk