Presentation on theme: "5 th Winter Conference on Medicinal and Bioorganic Chemistry (WCMBC) Steamboat Springs, Colorado January 26 – 31, 2003 C-H Activation: The New Generation."— Presentation transcript:
5 th Winter Conference on Medicinal and Bioorganic Chemistry (WCMBC) Steamboat Springs, Colorado January 26 – 31, 2003 C-H Activation: The New Generation Victor Snieckus, Christopher Jones, Bert Nolte and VS Group Queen’s University Kingston, ON Canada
Professor Robert Bergman, University of California, Berkeley C-H Activation: the Last Generation Tries to Keep Up with the Next Generation Professor John Hartwig, Yale University Catalytic Regioselective Functionalization of Alkanes and Arenes with Borane Reagents Professor Howard Alper, University of Ottawa Metal Catalyzed Reactions of Pharmaceutical Value Victor Snieckus, Queen’s University, Session Chair C-H Activation: An Overview Professor Shinji Murai, Osaka University Manipulation of usually unreactive C-H bonds for organic synthesis ?
Holy Grails of Chemistry Grail (Holy): cup or platter used (according to legend) by Christ at the Last Supper, and in which Joseph of Arimathea received Christ’s blood at the Cross; this as object of prolonged quest (by medieval knights, or fig.) [ME, OF groal etc. f. med. L. gradalis dish, of unkn. orig.] The Concise Oxford Dictionary 7th Ed. Clarendon Press, Reference works define a Holy Grail (“usually capitalized”) as an “eminently desirable and ultimate object of extended effort”, a “knightly quest”. … Holy Grails are also said to be “achievable only by those chaste in thought, word, and deed”; we leave judgment in this regard to our readers. Bard, A.J., Whitesides, G.M.; Zare, R.N.; McLaffertv, F.W. Acct. Chem. Res. 1995, 28, 91.
Holy Grails of Chemistry One “Holy Grail” of C-H activation research, therefore, is not simply t o find new C-H activation reactions but to obtain an understanding of them that will allow the development of reagents capable of selective transformations of C-H bonds into more reactive functionalized molecules. Arndtsen, B.A.; Bergman, R.G.; Mobley, T.A.; and Peterson, T.H. Acc. Chem. Res. 1995, 28, 154.
Holy Grails of Chemistry I am pleased that you should write to me about the series of articles "Holy Grails." I do not have any interest in any of the Holy Grails mentioned in your letter. I have been interested in several efforts to find the Holy Grail, that is, to find the answer to some question that I had formulated. Linus Pauling, Acct. Chem. Res. 1995, 28, 93
Reaching for the Holy Grail: Activation of Traditionally Unreactive Bonds Efficient, economic, clean (green) methods to bulk commodity chemicals Synthesize new raw materials for industry, medicine, research Overcome traditional dependence on C-X (X = heteroatom) SMs C – H Activation: inexpensive, available sources of functionalized carbon from hydrocarbon feedstocks - oil, petroleum (50% methane), natural gas C – X (X = Cl, F, OR) Activation: destruction of man-made environmental toxic compounds C – C Activation: application in synthesis Si – Si Activation: materials N triple bond N Activation: discover an environmentally friendly Haber process – production of ammonia Murai, S. Ed. Activation of Unreactive Bonds and Organic Synthesis, Springer: Berlin, (Book review: Snieckus, V. Advanced Synthesis & Catalysis, 2001, 3, 139) Herrmann,W.A.; Cornils, B. Angew. Chem. Int. Ed. 1999, 36, 1048.
C-H Activation: The New Generation. Reviews Jones, W.D. In Murai, S. Ed. Activation of Unreactive Bonds and Organic Synthesis, Springer: Berlin, 1999, p 9. See also Jones, W.D.et al Organometallics 2002, 21, 5320 (mechanism). Kakiuchi, F.; Murai, S. In Murai, S. Ed. Activation of Unreactive Bonds and Organic Synthesis, Springer: Berlin, 1999, p 47. Reviews: Thermal Activation of Hydrocarbon C-H Bonds by Cp*M(NO) Complexes of Molybdenum and Tungsten, Pamplin, C.B.; Legzdins, P. Acc. Chem. Res. 2003, Web Release Date: 09-Jan-2003; (Article) DOI: /ar Kakiuchi, F.; Murai, S. Acc. Chem. Res. 2002, 35, 826. Ritleng, V.; Sirlin, C.; Pfeffer, M. Chem. Rev. 2002, 102, Jia, C.; Kitamura, T.; Fujiwara, Y. Acc. Chem. Res. 2001, 34, 633. Guari, Y.; Sabo-Etienne, S.; Chaudret, B. Eur. J. Inorg. Chem. 1999, Dyker, G. Angew. Chem. Int. Ed. 1999, 38, Stahl, S.S.; Labinger, J.A.;Bercaw, J.E. Angew. Chem. Int. Ed. 1998, 37, Shilov, A.E.; Shul’pin, G.B. Chem. Rev. 1997, 97, Arndtsen, B.A.; Bergman, R.G.; Mobley, T.A.; and Peterson, T.H. Acc. Chem. Res. 1995, 28, 154. Crabtree, R.H. Chem. Rev. 1995, 95, 2599.
Direct C-H Activation. Consequences
Enantioselective Synthesis of β-Amino Acids C sp3 -H C-C Bond
Immobilized di-Rh Complex for Asymmetric C-H Activation C sp 3 -H C-C Bond
Immobilized di-Rh Complex for Asymmetric C-H Activation C sp3 -H C-C Bond
Catalytic Arylation, Alkenylation of Unactivated C-H Bonds C sp3 -H C-C Bond
Ar, HetAr C-H Activation. Addition to Olefins C sp 2 -H C-C Bond
Ar, HetAr C-H Activation. Addition to Olefins C sp 2 -H C-C Bond
Gallegher, T. 02 OL 3115; see also Larock, R.C. 02 JACS Review: Dyker, G. 99 ACIEE 1699; Fujiwara, Y. O1 ACR 633 (via -complexes) Competitive Heck Intramolecular C-H Activation Ar-H Act C-CBond Form
Cross Metathesis (CM) as Conceptual Equivalent for Vinyl Substitution and Allylic Oxidation C sp2 -H C-C Bond
Activation. Hydroacylation of Olefins
Catalyzed Hydroacylation Reactions. Imines
Enantioselective Synthesis of Alkaloids C sp3 -H C-N Bond
Activation of Traditionally Unreactive Bonds: Some Categories
α – OSiR 3 Insertion: Phosphonocyclopentenones
Acidic C-H Activation. Addition to and Aldehydes Ar-H Act C-CBond Form
C sp3 -H C-C Bond Enantioselective Synthesis of β-Amino Acids
C sp3 -H C-C Bond Catalytic Arylation, Alkenylation of Unactivated C-H Bonds
Chelation-Assisted β-Alkylation of Unsaturated Ketones C sp 2 -H C-C Bond
Vinyl C-H Activation. Addition to Olefins
Ar C-H Activation. Coupling with Olefins. Addition to Acetylenes
Ar C – H Activation. Coupling with CO and Olefins
Catalyzed Hydroacylation Reactions. Aldehydes
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Robert Bergman and Group Present Gerald E.K. Branch Distinguished Professor University of California, Berekeley 1977 Professor University of California, Berkeley 1969 Assistant Professor California Institute of Technology 1966 Ph.D. University of Wisconsin (Prof. Berson) 1963 B.A. Carleton College Selected Awards and Honours 2003 ACS James Flack Norris Award in Physical Organic Chemistry 1999 American Institute of Chemists Chemical Pioneer Award 1996 American Chemical Society Arthur C. Cope Award
Professor Robert Bergman University of California, Berkeley C-H Activation: the Last Generation Tries to Keep Up with the Next Generation
1992-Present Professor Yale University Post Doctoral Fellow Massachusetts Institute of Technology (Prof. Stephen Lippard) Ph.D. University of California, Berkeley (Prof. Robert Bergman) B.A. Princeton University John Hartwig and Group Selected Awards and Honours: 1997 Camille Dreyfus Teacher-Scholar Award 1997 Arthur C. Cope Scholar 1996 Alfred P. Sloan Research Fellow
Professor John Hartwig Yale University Catalytic Regioselective Functionalization of Alkanes and Arenes with Borane Reagents
Howard Alper 1963 B.Sc Sir George Williams University 1967 Ph.D. McGill University Post Doctoral Princeton University Assistant Professor State University of New York at Binghamton Associate Professor State University of New York at Binghamton Associate Professor University of Ottawa 1978 Professor University of Ottawa 1997-Present Vice-Rector, Research University of Ottawa Selected Awards and Honours: 2000 Gerhard Herzberg Canada Gold Medal for Science and Engineering 1999 Officer of the Order of Canada, Killam Research Fellow 1996 Associate Vice-Rector, Research University of Ottawa
Professor Howard Alper University of Ottawa Metal Catalyzed Reactions of Pharmaceutical Value
Professor Murai and Group 1999-Present Dean, Faculty Of Engineering Osaka University M. Eng. Osaka University D. Eng. Osaka University Assistant Professor Osaka University Associate Professor Osaka University Professor Osaka University Selected Awards and Honours: 1998 The Chemical Society of Japan Award 1985 Divisional Award of the Chemical Society of Japan (Organic Chemistry)
Professor Shinji Murai Osaka University Manipulation of usually unreactive C-H bonds for organic synthesis ?