Modern Organonickel Chemistry
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Functionalization of Heterocycles: a Metal Catalyzed Approach Via
FUNCTIONALIZATION OF HETEROCYCLES: A METAL CATALYZED APPROACH VIA ALLYLATION AND C-H ACTIVATION A Dissertation Submitted to the Graduate Faculty of the North Dakota State University of Agriculture and Applied Science By Sandeepreddy Vemula In Partial Fulfillment of the Requirements for the Degree of DOCTOR OF PHILOSOPHY Major Department: Chemistry and Biochemistry October 2018 Fargo, North Dakota North Dakota State University Graduate School Title FUNCTIONALIZATION OF HETEROCYCLES: A METAL CATALYZED APPROACH VIA ALLYLATION AND C-H ACTIVATION By Sandeepreddy Vemula The Supervisory Committee certifies that this disquisition complies with North Dakota State University’s regulations and meets the accepted standards for the degree of DOCTOR OF PHILOSOPHY SUPERVISORY COMMITTEE: Prof. Gregory R. Cook Chair Prof. Mukund P. Sibi Prof. Pinjing Zhao Prof. Dean Webster Approved: November 16, 2018 Prof. Gregory R. Cook Date Department Chair ABSTRACT The central core of many biologically active natural products and pharmaceuticals contain N-heterocycles, the installation of simple/complex functional groups using C-H/N-H functionalization methodologies has the potential to dramatically increase the efficiency of synthesis with respect to resources, time and overall steps to key intermediate/products. Transition metal-catalyzed functionalization of N-heterocycles proved as a powerful tool for the construction of C-C and C-heteroatom bonds. The work in this dissertation describes the development of palladium catalyzed allylation, and the transition metal catalyzed C-H activation for selective functionalization of electron deficient N-heterocycles. Chapter 1 A thorough study highlighting the important developments made in transition metal catalyzed approaches for C-C and C-X bond forming reactions is discussed with a focus on allylation, directed indole C-2 substitution and vinylic C-H activation. -
Structures and Reaction Mechanisms of Organocuprate Clusters in Organic Chemistry
REVIEWS Wherefore Art Thou Copper? Structures and Reaction Mechanisms of Organocuprate Clusters in Organic Chemistry Eiichi Nakamura* and Seiji Mori Organocopper reagents provide the principles. This review will summarize example of molecular recognition and most general synthetic tools in organic first the general structural features of supramolecular chemistry, which chemistry for nucleophilic delivery of organocopper compounds and the pre- chemists have long exploited without hard carbanions to electrophilic car- vious mechanistic arguments, and then knowing it. Reasoning about the bon centers. A number of structural describe the most recent mechanistic uniqueness of the copper atom among and mechanistic studies have been pictures obtained through high-level neighboring metal elements in the reported and have led to a wide variety quantum mechanical calculations for periodic table will be presented. of mechanistic proposals, some of three typical organocuprate reactions, which might even be contradictory to carbocupration, conjugate addition, Keywords: catalysis ´ conjugate addi- others. With the recent advent of and SN2 alkylation. The unified view tions ´ copper ´ density functional physical and theoretical methodolo- on the nucleophilic reactivities of met- calculations ´ supramolecular chemis- gies, the accumulated knowledge on al organocuprate clusters thus ob- try organocopper chemistry is being put tained has indicated that organocup- together into a few major mechanistic rate chemistry represents an intricate 1. Introduction 1 R Cu X The desire to learn about the nature of elements has been R or R1 R and will remain a main concern of chemists. In this review, we R Cu will consider what properties of copper make organocopper R1 chemistry so useful in organic chemistry. -
Mechanistic Considerations on the Hydrodechlorination Process of Polychloroarenes
Chapter 3 Mechanistic Considerations on the Hydrodechlorination Process of Polychloroarenes YoshiharuYoshiharu Mitoma, Mitoma, Yumi KatayamaYumi Katayama andand CristianCristian Simion Simion Additional information is available at the end of the chapter http://dx.doi.org/10.5772/intechopen.79083 Abstract Defunctionalization of organochlorines through reductive dechlorination (also known as hydrodechlorination—replacement of chlorine atoms by hydrogen—is one of the main methodologies used in the detoxification of these harmful compounds. Most of the pub- lished papers on this particular matter focused on specific reagents, reaction conditions, and mainly result efficiency. Some of the authors were also concerned with reaction -path ways (e.g., the order in which chlorine atoms were removed from a polychlorinated aro- matic substrate—polychlorinated biphenyls, PCBs; polychlorinated dibenzo-p-dioxins, PCDDs; or polychlorinated dibenzofurans, PCDFs). However, the papers that dealt with the investigation of reaction mechanism were rather scarce. This chapter presents the advances made by researchers in understanding, from a mechanistic point of view, the hydrodechlorination process, along with our own assumptions. In doing so, it would be easier to predict the behavior of such compounds in a specific environment, showing more clearly the scope and limitations of each process, depending on the reaction condi- tions and reagents. Keywords: hydrodechlorination, reaction mechanism, metal/hydrogen donor 1. Introduction Most chlorinated and especially polychlorinated arenes (such as polychloro-dibenzo-p-diox- ins 1, polychloro-dibenzofurans 2, or polychlorobiphenyls 3) are persistent organic pollutants (POPs) that are harmful to both man and the environment [1–5]. © 2016 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons © 2018 The Author(s). -
Novel Microbiocides
(19) TZZ _Z__T (11) EP 2 641 901 A1 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: (51) Int Cl.: 25.09.2013 Bulletin 2013/39 C07D 215/40 (2006.01) C07D 401/12 (2006.01) A61K 31/4709 (2006.01) A01N 43/42 (2006.01) (21) Application number: 12160780.8 (22) Date of filing: 22.03.2012 (84) Designated Contracting States: (72) Inventor: The designation of the inventor has not AL AT BE BG CH CY CZ DE DK EE ES FI FR GB yet been filed GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (74) Representative: Herrmann, Jörg Designated Extension States: Syngenta Crop Protection BA ME Münchwilen AG Intellectual Property Department (71) Applicant: Syngenta Participations AG Schaffhauserstrasse 4058 Basel (CH) 4332 Stein (CH) (54) Novel microbiocides (57) The invention relates to compounds of formula I wherein R1, R2, X, Y1, Y2, Y3, D1, D2, D3, G1, G2, G3 and p are as defined in the claims. The invention further provides intermediates used in the preparation of these compounds, to compositions which comprise these compounds and to theiruse in agriculture or horticulture for controlling orpreventing infestation of plants by phytopathogenic microorganisms, preferably fungi. EP 2 641 901 A1 Printed by Jouve, 75001 PARIS (FR) EP 2 641 901 A1 Description [0001] The present invention relates to novel microbiocidally active, in particular fungicidally active, cyclic bisoxime derivatives. Itfurther relatesto intermediates used inthe preparationof these compounds, to compositions which comprise 5 these compounds and to their use in agriculture or horticulture for controlling or preventing infestation of plants by phytopathogenic microorganisms, preferably fungi. -
202 Section: B Course Instructor: Dr BK Singh Study Material (Name of T
Course Name: Methods in Organic Synthesis Paper Number: 202 Section: B Course Instructor: Dr BK Singh Study Material (Name of Topic/Chapter): Organosilicone Compounds, Preparation and applications in organic synthesis; Application of Pd(0) and Pd(II) Complexes in Organic Synthesis- Stille, Suzuki and Sonogashira Coupling, Heck reaction and Negishi Coupling. Dr. BK SINGH, Department of Chemistry, University of Delhi Applications of Pd(0) and Pd(II) complexes in organic synthesis- Heck, Negishi, Suzuki, Stille and Sonogashira Coupling 2010 Nobel Prize in Chemistry awarded jointly to Richard F. Heck, Ei-ichi Negishi, and Akira Suzuki "for palladium-catalyzed cross couplings in organic synthesis" Dr. BK SINGH, Department of Chemistry, University of Delhi Palladium-catalyzed carbon-carbon bond formation via cross coupling The principle of palladium-catalyzed cross couplings is that two molecules are assembled on the metal via the formation of metal-carbon bonds. In this way the carbon atoms bound to palladium are brought very close to one another. In the next step they couple to one another and this leads to the formation of a new carbon-carbon single bond. There are two types of cross-coupling reactions that have become important in organic synthesis. Both reactions are catalyzed by zero valent Pd and both reactions employ an organohalide RX (or analogous compound) as the electrophilic coupling partner. The nucleophilic coupling partner differs in these two reactions. In the first type it is an olefin whereas in the second type it is an organometallic compound R’’M where, M is typically zinc, boron, or tin. Both reactions begin by generating an organopalladium complex RPdX from the reaction of the organic halide with Pd(0). -
Neutral, Cationic and Anionic Organonickel and -Palladium Complexes Supported by Cite This: Dalton Trans., 2020, 49, 322 Iminophosphine/Phosphinoenaminato Ligands†‡
Dalton Transactions View Article Online PAPER View Journal | View Issue Neutral, cationic and anionic organonickel and -palladium complexes supported by Cite this: Dalton Trans., 2020, 49, 322 iminophosphine/phosphinoenaminato ligands†‡ Tomás G. Santiago, Carmen Urbaneja, Eleuterio Álvarez, Elena Ávila, Pilar Palma and Juan Cámpora * We report a series of organometallic nickel and palladium complexes containing iminophosphine ligands R2PCH2C(Ph) = N-Dipp (Dipp = 2,6-diisopropylphenyl; R = iPr, La; R = Ph, Lb; and R = o-C6H4OMe, Lc), synthesized by ligand exchange or oxidative addition reactions, and we investigate the capacity of such ligands to undergo reversible deprotonation to the corresponding phosphinoenaminato species. In the attempted ligand exchange reaction of the nickel bis(trimethylsilyl)methyl precursor [Ni(CH2SiMe3)2Py2] with Lb, the iminophosphine acts as a weak acid rather than a neutral ligand, cleaving one of the Ni–C bonds, to afford the phosphinoenaminato complex [Ni(CH2SiMe3)(L’b)(Py)] (L’b = conjugate base of Lb). Creative Commons Attribution-NonCommercial 3.0 Unported Licence. + We disclose a general method for the syntheses of complexes [Ni(CH2SiMe3)(L)(Py)] (L = La, Lb or Lc), and demonstrate that iminophosphine deprotonation is a general feature and occurs reversibly in the coordination sphere of the metal. By studying proton exchange reactions of the cation [Ni(CH2SiMe3)(Lb) (Py)]+ with bases of different strength we show that the conjugate phosphinoenaminato ligand in Received 17th October 2019, [Ni(CH2SiMe3)(L’b)(Py)] is a base with strength comparable to DBU in THF. The acyl group in the function- Accepted 19th November 2019 alized aryl complex [Ni(p-C6H4COCH3)(Br)(La)] does not interfere in the iminophosphine deprotonation with DOI: 10.1039/c9dt04062e − + NaH. -
Recollections of Organopalladium Chemistry*
Pure Appl. Chem., Vol. 71, No. 8, pp. 1539±1547, 1999. Printed in Great Britain. q 1999 IUPAC Recollections of organopalladium chemistry* Jiro Tsuji Emeritus Professor, Tokyo Institute of Technology, Tsu 602±128, Kamakura, Japan Abstract: Organopalladium chemistry has 40 years' history. It was born in late 1950s by the invention of the Wacker process. Inspired by the Wacker reaction, we discovered the ®rst example of the carbon±carbon bond formation by means of a Pd complex, and opened the ®eld of p-allylpalladium chemistry. Historical account of organopalladium chemistry, and major accomplishments in our laboratory in 1960s are presented. INTRODUCTION Invention of the Wacker process to produce acetaldehyde using PdCl2±CuCl2 as catalysts in 1959 is the ®rst example of the homogeneous palladium-catalyzed reaction [1]. Soon after the invention of the Wacker process, formation of vinyl acetate by the oxidative acetoxylation of ethylene with PdCl2 in AcOH in the presence of NaOAc was reported by Moiseev [2]. Vinyl acetate is now produced commercially based on this reaction using supported Pd catalyst in a gas phase (Scheme 1). Scheme 1 As mechanistic explanation of the formation of acetaldehyde, Smidt and co-workers made the following statement in their review [1]. `Nucleophilic attack on ole®n and hydride transfer are characteristic for this reaction. The oxygen required for the oxidation of the ole®n is provided by the water. According to our hypothesis only the oxygen atom of the water is transferred to the ole®n, while the four hydrogen atoms originally present in ethylene remain there.' The early 1960s was the dawn of the research on OMCOS. -
Redox-Induced Aromatic C–H Bond Functionalization in Metal Complex Catalysis from the Electrochemical Point of View
Review Redox-Induced Aromatic C–H Bond Functionalization in Metal Complex Catalysis from the Electrochemical Point of View Yulia H. Budnikova *, Yulia B. Dudkina and Mikhail N. Khrizanforov A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, Arbuzov str. 8, 420088 Kazan, Russian Federation; [email protected] (Y.B.D.); [email protected] (M.N.K.) * Correspondence: [email protected]; Tel.: +7-843-279-5335 Received: 18 September 2017; Accepted: 12 October 2017; Published: 16 October 2017 Abstract: This review generalizes and specifies the oxidizing ability of a number of oxidants used in palladium (Pd)-catalyzed aromatic C–H functionalizations. The redox potentials have been analyzed as the measure of oxidant strength and applied to the reasoning of the efficiency of known reactions where catalytic cycles include cyclometalated palladium complexes (and other organopalladium key intermediates). Keywords: palladium; oxidant; metal complex catalysis; electrochemistry; redox potential 1. Introduction Transition-metal-catalyzed direct C–H functionalizations open a new road for diverse C–C, C– P, and C–N bond construction in a one-step and atom economical way, without the requirement of prefunctionalized C–H coupling partners [1–6]. The cleavage of high energy C–H bonds (E ~ 110 kcal·mol−1 for C(aryl)–H bonds) typically requires harsh reaction conditions that result in limited substrate scope and low functional group tolerance. The driving force of the current research is the development of the next generation of C–H transformations, which will help make these processes truly useful synthetic tools and develop reactions that proceed under milder conditions. -
Title Investigation of Organoiron Catalysis in Kumada‒Tamao‒Corriu-Type Cross-Coupling Reaction Assisted by Solution-Phase X
Investigation of Organoiron Catalysis in Title Kumada‒Tamao‒Corriu-Type Cross-Coupling Reaction Assisted by Solution-Phase X-ray Absorption Spectroscopy Takaya, Hikaru; Nakajima, Sho; Nakagawa, Naohisa; Isozaki, Katsuhiro; Iwamoto, Takahiro; Imayoshi, Ryuji; Gower, Nicholas J.; Adak, Laksmikanta; Hatakeyama, Takuji; Honma, Author(s) Tetsuo; Takagaki, Masafumi; Sunada, Yusuke; Nagashima, Hideo; Hashizume, Daisuke; Takahashi, Osamu; Nakamura, Masaharu Bulletin of the Chemical Society of Japan (2015), 88(3): 410- Citation 418 Issue Date 2015 URL http://hdl.handle.net/2433/196165 © 2015 The Chemical Society of Japan.; 本文ファイルは出版 社の許可を得て登録しています.; This is not the published Right version. Please cite only the published version.; この論文は出 版社版でありません。引用の際には出版社版をご確認ご 利用ください。 Type Journal Article Textversion author Kyoto University Bull. Chem. Soc. Jpn. in press (doi:10.1246/bcsj.20140376) Graphical Abstract Investigation of Organoiron Catalysis in Kumada–Tamao–Corriu-Type Cross-Coupling Reaction Assisted by Solution-Phase X-ray Absorption Spectroscopy H. Takaya, S. Nakajima, N. Nakagawa, K. Isozaki, T. Iwamoto, R. Imayoshi, N. J. Gower, L. Adak, T. Hatakeyama, T. Honma, M. Takagaki, Y. Sunada, H. Nagashima, D. Hashizume, O. Takahashi, and M. Nakamura Solution-phase molecular structures of organoiron intermediates of Kumada–Tamao–Corriu-type cross-coupling were illuminated by X-ray absorption spectroscopy. The intermediacy of halomesityl iron complex of II II Fe BrMes(SciOPP) and dimesityl iron complex of Fe Mes2(SciOPP) was adequately elucidated with formal non- redox FeII/FeII catalytic cycle. 1 Investigation of Organoiron Catalysis in Kumada–Tamao–Corriu-Type Cross-Coupling Reaction Assisted by Solution-Phase X-ray Absorption Spectroscopy Hikaru Takaya,*a,b Sho Nakajima,a,b Naohisa Nakagawa,a Katsuhiro Isozaki,a,b,g Takahiro Iwamoto,a,b,g Ryuji Imayoshi,a,b Nicholas J. -
X International Conference “Mechanisms of Catalytic Reactions”
Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia Zelinsky Institute of Organic Chemistry RAS, Moscow, Russia Lomonosov Moscow State University, Moscow, Russia 2016 X International Conference “Mechanisms of Catalytic Reactions” Svetlogorsk, Kaliningrad Region, Russia October 2 - 6, 2016 ABSTRACTS Novosibirsk-2016 Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia Zelinsky Institute of Organic Chemistry RAS, Moscow, Russia Lomonosov Moscow State University, Moscow, Russia X International Conference “Mechanisms of Catalytic Reactions” Svetlogorsk, Kaliningrad Region, Russia October 2 - 6, 2016 ABSTRACTS Novosibirsk-2016 УДК 544.47+66.09 ББК Г544 M45 Mechanisms of Catalytic Reactions. X International Conference (MCR-X). (October 2 - 6, 2016, Svetlogorsk, Kaliningrad Region, Russia) [Electronic resourse]: Book of abstracts / Boreskov Institute of Catalysis SB RAS ed.: prof. V.I. Bukhtiyarov, - Novosibirsk: BIC, 2016. p.328, – 1 electronic optical disc (CD-R). ISBN 978-5-906376-15-2 В надзаг.: Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia Zelinsky Institute of Organic Chemistry RAS, Moscow, Russia Lomonosov Moscow State University, Moscow, Russia Topics of book: – First-principles approach, theory and simulation in catalysis; – Advanced methods for studies of mechanisms of catalyzed reactions; – In-situ and operando studies of model and real catalysts; – Kinetics and reaction intermediates of catalyzed processes; – From mechanistic studies to design of advanced catalyst systems. The Conference is accompanied -
Chapter 1 the Basic Chemistry of Organopalladium Compounds
Chapter 1 The Basic Chemistry of Organopalladium Compounds 1.1 Characteristic Features of Pd-Promoted or -Catalyzed Reactions There are several features which make reactions involving Pd catalysts and reagents particularly useful and versatile among many transition metals used for organic synthesis. Most importantly, Pd catalysts offer an abundance of possibilities of carbon–carbon bond formation. Importance of the carbon–carbon bond forma- tion in organic synthesis needs no explanation. No other transition metals can offer such versatile methods of the carbon–carbon bond formations as Pd. Tol- erance of Pd catalysts and reagents to many functional groups such as carbonyl and hydroxy groups is the second important feature. Pd-catalyzed reactions can be carried out without protection of these functional groups. Although reactions involving Pd should be carried out carefully, Pd reagents and catalysts are not very sensitive to oxygen and moisture, and even to acid in many reactions catalyzed by Pd–phosphine complexes. It is enough to apply precautions to avoid oxidation of coordinated phosphines, and this can be done easily. On the other hand, the Ni(0) complex is extremely sensitive to oxygen. Of course, Pd is a noble metal and expensive. Its price frequently fluctuates drastically. A few years ago, Pd was more expensive than Pt and Au but cheaper than Rh. As of October 2003, the comparative prices of the noble metals were: Pd (1), Au (1.8), Rh (2.8), Pt (3.3), Ru (0.2). Recently the price of Pd has dropped dramatically, and Pt is currently the most expensive noble metal. Also, the toxicity of Pd has posed no serious problem so far. -
Mechanistic Aspects of the Kharasch Addition Reaction Catalyzed by Organonickel(II)
Organometallics 1997, 16, 4985-4994 4985 Mechanistic Aspects of the Kharasch Addition Reaction Catalyzed by Organonickel(II) Complexes Containing the Monoanionic Terdentate Aryldiamine Ligand System -† [C6H2(CH2NMe2)2-2,6-R-4] Lucia A. van de Kuil,‡,§ David M. Grove,‡ Robert A. Gossage,‡ Jan W. Zwikker,§ Leonardus W. Jenneskens,§ Wiendelt Drenth,§ and Gerard van Koten*,‡ Debye Institute, Departments of Metal-Mediated Synthesis and Physical Organic Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands Received January 28, 1997X The addition reaction of polyhalogenated alkanes to alkenes (Kharasch addition reaction) is homogeneously catalyzed in the absence of O2 under mild reaction conditions (25 °C) by II the arylnickel complexes [Ni {C6H2(CH2NMe2)2-2,6-R-4}Br] (R ) H, MeC(O), Cl, MeO, NH2) and shows a high selectivity for the 1:1 adduct. Kinetic data on the catalytic system with [Ni{C6H3(CH2NMe2)2-2,6}Br] (R ) H; abbreviated as [Ni(NCN)Br]), methyl methacrylate, and CCl4 reveal a rate of reaction that is first order in nickel complex and in alkene. In our series of para-substituted arylnickel catalysts, the rate of catalysis increases with the electron donating character of the para substituents on the aryl ligand and this rate correlates directly with the NiII/NiIII redox potential. These data, together with separate spectroscopic studies and results from individual experiments employing other solvents, other polyhalogenated alkanes such as CBr4 and CF3CCl3 and other alkene substrates such as styrene, 1-octene, and cyclohexene, lead to the proposal of a catalytic cycle based on a nonchain mechanism with a mononuclear nickel species.