1
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Šloufová I, Urválková T, Hissler M, Vohlídal J. Novel Metallo-Supramolecular Polymers with 1-Thioxophosphole Main-Chain Units and Remarkable Photoinduced Changes in Their Resonance Raman Spectra. Polymers (Basel) 2022; 14:polym14235207. [PMID: 36501602 PMCID: PMC9739564 DOI: 10.3390/polym14235207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/17/2022] [Accepted: 11/22/2022] [Indexed: 12/02/2022] Open
Abstract
New low-bandgap unimers, with the central thiophene-(1-thioxophosphole)-thiophene (TPT) ring sequence and 2,2':6',2″-terpyridin-4'-yl (tpy) end groups connected to the central unit via conjugated linkers of different size, are prepared and assembled with Zn(II) and Fe(II) ions to metallo-supramolecular polymers (MSPs) that are studied regarding their properties. The most interesting feature of Zn-MSPs is the luminescence extended deep into the NIR region. Fe-MSPs not only show the metal-to-ligand charge transfer (MLCT) manifested by the MLCT band (an expected feature) but also an as-yet-undescribed remarkable phenomenon: specific damping of the bands of the TPT sequence in the resonance Raman spectra taken from solid Fe-MSPs using the excitation to the MLCT band (532 nm). The damping is highly reversible at the low laser power of 0.1 mW but gradually becomes irreversible as the power reaches ca. 5 mW. The revealed phenomenon is not shown by the same Fe-MSPs in solutions, nor by Fe-MSPs containing no phosphole units. A hypothesis is proposed that explains this phenomenon and its dependence on the irradiation intensity as a result of the interplay of three factors: (i) enhancement of the MLCT process by excitation radiation, (ii) the electron-acceptor character of the 1-thioxophosphole ring, and (iii) morphological changes of the lattice and their dependence on the population of new structures in the lattice.
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Affiliation(s)
- Ivana Šloufová
- Deptartment of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, 128 40 Prague 2, Czech Republic
- Correspondence: (I.Š.); (M.H.); (J.V.)
| | - Tereza Urválková
- Deptartment of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, 128 40 Prague 2, Czech Republic
- CNRS, University Rennes, ISCR-UMR 6226, 35000 Rennes, France
| | - Muriel Hissler
- CNRS, University Rennes, ISCR-UMR 6226, 35000 Rennes, France
- Correspondence: (I.Š.); (M.H.); (J.V.)
| | - Jiří Vohlídal
- Deptartment of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, 128 40 Prague 2, Czech Republic
- Correspondence: (I.Š.); (M.H.); (J.V.)
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2
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Chang S, Bu J, Li J, Lin J, Liu Z, Ma W, Zhang J. Highly efficient electrocatalytic deuteration of acetylene to deuterated ethylene using deuterium oxide. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Lee MY, Kahl C, Kaeffer N, Leitner W. Electrocatalytic Semihydrogenation of Alkynes with [Ni(bpy) 3] 2. JACS AU 2022; 2:573-578. [PMID: 35373211 PMCID: PMC8970006 DOI: 10.1021/jacsau.1c00574] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Electrifying the production of base and fine chemicals calls for the development of electrocatalytic methodologies for these transformations. We show here that the semihydrogenation of alkynes, an important transformation in organic synthesis, is electrocatalyzed at room temperature by a simple complex of earth-abundant nickel, [Ni(bpy)3]2+. The approach operates under mild conditions and is selective toward the semihydrogenated olefins with good to very good Z isomer stereoselectivity. (Spectro)electrochemistry supports that the electrocatalytic cycle is initiated in an atypical manner with a nickelacyclopropene complex, which upon further protonation is converted into a putative cationic Ni(II)-vinyl intermediate that produces the olefin after electron-proton uptake. This work establishes a proof of concept for homogeneous electrocatalysis applied to alkyne semihydrogenation, with opportunities to improve the yields and stereoselectivity.
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4
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Kadikova RN, Gabdullin AM, Mozgovoj OS, Ramazanov IR, Dzhemilev UM. NbCl 5-Mg Reagent System in Regio- and Stereoselective Synthesis of (2 Z)-Alkenylamines and (3 Z)-Alkenylols from Substituted 2-Alkynylamines and 3-Alkynylols. Molecules 2021; 26:3722. [PMID: 34207186 PMCID: PMC8234592 DOI: 10.3390/molecules26123722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/11/2021] [Accepted: 06/13/2021] [Indexed: 11/16/2022] Open
Abstract
The reduction of N,N-disubstituted 2-alkynylamines and substituted 3-alkynylols using the NbCl5-Mg reagent system affords the corresponding dideuterated (2Z)-alkenylamine and (3Z)-alkenylol derivatives in high yields in a regio- and stereoselective manner through the deuterolysis (or hydrolysis). The reaction of substituted propargylamines and homopropargylic alcohols with the in situ generated low-valent niobium complex (based on the reaction of NbCl5 with magnesium metal) is an efficient tool for the synthesis of allylamines and homoallylic alcohols bearing a 1,2-disubstituted double bond. It was found that the well-known approach for the reduction of alkynes based on the use of the TaCl5-Mg reagent system does not work for 2-alkynylamines and 3-alkynylols. Thus, this article reveals a difference in the behavior of two reagent systems-NbCl5-Mg and TaCl5-Mg, in relation to oxygen- and nitrogen-containing alkynes. A regio- and stereoselective method was developed for the synthesis of nitrogen-containing E-β-chlorovinyl sulfides based on the reaction of 2-alkynylamines with three equivalents of methanesulfonyl chloride in the presence of stoichiometric amounts of niobium(V) chloride and magnesium metal in toluene.
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Affiliation(s)
- Rita N. Kadikova
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences, 141 Prospekt Oktyabrya, 450075 Ufa, Russia; (A.M.G.); (O.S.M.); (I.R.R.); (U.M.D.)
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5
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Kadikova RN, Ramazanov IR, Gabdullin AM, Mozgovoj OS, Dzhemilev UM. Niobium- and zirconium-catalyzed reactions of substituted 2 alkynylamines with Et 2Zn. RSC Adv 2021; 11:4631-4638. [PMID: 35424400 PMCID: PMC8694551 DOI: 10.1039/d0ra10132j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/13/2021] [Indexed: 01/02/2023] Open
Abstract
The NbCl5-EtMgBr-catalyzed reaction of N,N-disubstituted 2-alkynylamines with Et2Zn followed by hydrolysis or deuterolysis affords (2Z)-alkenylamines (reduction products of alkyne) in high yields. The reaction of N,N-disubstituted 2-alkynylamines with Et2Zn catalyzed by the Cp2ZrCl2-EtMgBr system occurs as 2-zincoethylzincation, resulting, after deuterolysis or iodinolysis, in the regio- and stereoselective formation of the corresponding dideuterated and diiodinated 2-alkenylamine derivatives with a trisubstituted double bond. This study demonstrates the difference between the catalytic effects of NbCl5 and Cp2ZrCl2 on the pathway of reaction of tertiary 2-alkynylamines with Et2Zn in the presence of catalytic amounts of EtMgBr.
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Affiliation(s)
- Rita N Kadikova
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences 141 Prospekt Oktyabrya Ufa 450075 Russian Federation
| | - Ilfir R Ramazanov
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences 141 Prospekt Oktyabrya Ufa 450075 Russian Federation
| | - Azat M Gabdullin
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences 141 Prospekt Oktyabrya Ufa 450075 Russian Federation
| | - Oleg S Mozgovoj
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences 141 Prospekt Oktyabrya Ufa 450075 Russian Federation
| | - Usein M Dzhemilev
- Institute of Petrochemistry and Catalysis of Russian Academy of Sciences 141 Prospekt Oktyabrya Ufa 450075 Russian Federation
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6
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Laktsevich-Iskryk MV, Rudovich AS, Zhabinskii VN, Khripach VA, Hurski AL. A photochemical approach to 18-nor-17β-hydroxymethyl-17α-methylandrost-13-ene steroids. Steroids 2020; 159:108652. [PMID: 32360417 DOI: 10.1016/j.steroids.2020.108652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/14/2020] [Accepted: 04/24/2020] [Indexed: 11/22/2022]
Abstract
A photochemical approach to 18-nor-17β-hydroxymethyl-17α-methylandrost-13-ene unit of the long-term metabolites of 17-methylated androgenic anabolic steroids (AAS) is reported. It is based on a visible light-promoted radical decarboxylative alkynylation of steroidal redox-active ester. The developed method was used in synthesis of the long-term metabolite of AAS oxymesterone.
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Affiliation(s)
- Marharyta V Laktsevich-Iskryk
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich st., 5/2, 220141 Minsk, Belarus
| | - Anton S Rudovich
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich st., 5/2, 220141 Minsk, Belarus
| | - Vladimir N Zhabinskii
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich st., 5/2, 220141 Minsk, Belarus.
| | - Vladimir A Khripach
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich st., 5/2, 220141 Minsk, Belarus
| | - Alaksiej L Hurski
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich st., 5/2, 220141 Minsk, Belarus
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7
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Fischer M, Vincent-Heldt L, Hillje M, Schmidtmann M, Beckhaus R. Synthesis of a titanium ethylene complex via C–H-activation and alternative access to Cp2Ti(η2-Me3SiC2SiMe3). Dalton Trans 2020; 49:2068-2072. [DOI: 10.1039/d0dt00237b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a room temperature stable titanacyclopropane in a one-step-two-transformation protocol is presented. Additionally, a novel one-pot procedure toward Cp2Ti(η2-Me3SiC2SiMe3) was subsequently developed.
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Affiliation(s)
- Malte Fischer
- Institut für Chemie
- Fakultät für Mathematik und Naturwissenschaften
- Carl von Ossietzky Universität Oldenburg
- 26111 Oldenburg
- Germany
| | - Lisa Vincent-Heldt
- Institut für Chemie
- Fakultät für Mathematik und Naturwissenschaften
- Carl von Ossietzky Universität Oldenburg
- 26111 Oldenburg
- Germany
| | - Malena Hillje
- Institut für Chemie
- Fakultät für Mathematik und Naturwissenschaften
- Carl von Ossietzky Universität Oldenburg
- 26111 Oldenburg
- Germany
| | - Marc Schmidtmann
- Institut für Chemie
- Fakultät für Mathematik und Naturwissenschaften
- Carl von Ossietzky Universität Oldenburg
- 26111 Oldenburg
- Germany
| | - Ruediger Beckhaus
- Institut für Chemie
- Fakultät für Mathematik und Naturwissenschaften
- Carl von Ossietzky Universität Oldenburg
- 26111 Oldenburg
- Germany
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8
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MacLeod KC, DiMucci IM, Zovinka EP, McWilliams SF, Mercado BQ, Lancaster KM, Holland PL. Masked Radicals: Iron Complexes of Trityl, Benzophenone, and Phenylacetylene. Organometallics 2019; 38:4224-4232. [PMID: 34103782 DOI: 10.1021/acs.organomet.9b00534] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report the first Fe─CPh3 complex, and show that the long Fe─C bond can be disrupted by neutral π-acceptor ligands (benzophenone and phenylacetylene) to release the triphenylmethyl radical. The products are formally iron(I) complexes, but X-ray absorption spectroscopy coupled with density functional and multireference ab initio calculations indicates that the best description of all the complexes is iron(II). In the formally iron(I) complexes, this does not imply that the π-acceptor ligand has radical character, because the iron(II) description arises from doubly-occupied frontier molecular orbitals that are shared equitably by the iron and the π-acceptor ligand, and the unpaired electrons lie on the metal. Despite the lack of substantial radical character on the ligands, alkyne and ketone fragments can couple to form a high-spin iron(III) complex with a cyclized metalladihydrofuran core.
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Affiliation(s)
- K Cory MacLeod
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511
| | - Ida M DiMucci
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca New York 14853
| | - Edward P Zovinka
- Department of Chemistry, Saint Francis University, Loretto, Pennsylvania 15940
| | - Sean F McWilliams
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511
| | - Brandon Q Mercado
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511
| | - Kyle M Lancaster
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca New York 14853
| | - Patrick L Holland
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511
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9
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Sanogo Y, Othman RB, Dhambri S, Selkti M, Jeuken A, Prunet J, Férézou JP, Ardisson J, Lannou MI, Sorin G. Ti(II) and Rh(I) Complexes as Reagents toward a Thapsigargin Core. J Org Chem 2019; 84:5821-5830. [PMID: 30964681 DOI: 10.1021/acs.joc.8b03249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A novel approach toward the [5-7]fused bicyclic core of thapsigargin, a subnanomolar inhibitor of the endo/sarcoplasmic calcium ATPase (SERCA), is presented. The synthetic route includes an original Ti(II)-mediated hydroxy-directed reductive coupling of an enantiomerically enriched propargylic alcohol and an intramolecular Rh(I)-catalyzed cyclocarbonylation reaction as key steps. Interestingly, through the first experiments of titanocene-mediated reductive cyclization of a 1,8-enyne, a seven-membered cycle was isolated as a unique product with a total diastereoselectivity.
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Affiliation(s)
- Youssouf Sanogo
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Raja Ben Othman
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Sabrina Dhambri
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Mohamed Selkti
- Unité CNRS UMR 8015 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Alan Jeuken
- WestCHEM, School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , United Kingdom
| | - Joëlle Prunet
- WestCHEM, School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , United Kingdom
| | - Jean-Pierre Férézou
- Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO (CNRS UMR 8182) , Université Paris-Sud, Université Paris-Saclay , Bâtiment 410 , Orsay F-91405 , France
| | - Janick Ardisson
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Marie-Isabelle Lannou
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Geoffroy Sorin
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
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10
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Han X, Hu J, Chen C, Yuan Y, Shi Z. Copper-catalysed, diboron-mediated cis-dideuterated semihydrogenation of alkynes with heavy water. Chem Commun (Camb) 2019; 55:6922-6925. [PMID: 31139796 DOI: 10.1039/c9cc03213d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Methods to incorporate deuterium atoms into organic molecules are valuable for the pharmaceutical industry. Here, we found that diboron reagents can efficiently mediate the transfer of two D atoms from heavy water directly onto alkynes through copper-catalysed cis-selective semihydrogenation. Avoiding the use of costly and flammable D2 gas, this safe and practical process can proceed with excellent chemoselectivity and stereoselectivity. Utilizing the present method as the key step, the formal asymmetric total synthesis of d2-deuterium-labeled cis-combretastatin A4 is demonstrated. Mechanistic studies suggest that monoborylation of alkynes is the key step for this semihydrogenation process.
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Affiliation(s)
- Xiaowei Han
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
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11
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Suzuki N, Kurita R, Kawamura A, Ono T, Masuyama Y. Five-membered zircona- and titanacycloallenes; their diverse reactivity depending upon the position of substituents. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Han XW, Zhang T, Zheng YL, Yao WW, Li JF, Pu YG, Ye M, Zhou QL. Brønsted Acid Enabled Nickel-Catalyzed Hydroalkenylation of Aldehydes with Styrene and its Derivatives. Angew Chem Int Ed Engl 2018; 57:5068-5071. [PMID: 29498163 DOI: 10.1002/anie.201801817] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 02/28/2018] [Indexed: 01/01/2023]
Abstract
A Brønsted acid enabled nickel-catalyzed hydroalkenylation of aldehydes and styrene derivatives has been developed. The Brønsted acid acts as a proton shuttle to transfer a proton from the alkene to the aldehyde, thereby leading to an economical and byproduct-free coupling. A series of synthetically useful allylic alcohols were obtained through one-step reactions from readily available styrene derivatives and aliphatic aldehydes in up to 88 % yield and with high linear selectivity.
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Affiliation(s)
- Xing-Wang Han
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Tao Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yan-Long Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Wei-Wei Yao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Jiang-Fei Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - You-Ge Pu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
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13
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Han XW, Zhang T, Zheng YL, Yao WW, Li JF, Pu YG, Ye M, Zhou QL. Brønsted Acid Enabled Nickel-Catalyzed Hydroalkenylation of Aldehydes with Styrene and its Derivatives. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xing-Wang Han
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Tao Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Yan-Long Zheng
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Wei-Wei Yao
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Jiang-Fei Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - You-Ge Pu
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Tianjin 300071 China
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14
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Liao G, Yao QJ, Zhang ZZ, Wu YJ, Huang DY, Shi BF. Scalable, Stereocontrolled Formal Syntheses of (+)-Isoschizandrin and (+)-Steganone: Development and Applications of Palladium(II)-Catalyzed Atroposelective C−H Alkynylation. Angew Chem Int Ed Engl 2018; 57:3661-3665. [DOI: 10.1002/anie.201713106] [Citation(s) in RCA: 149] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Gang Liao
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Qi-Jun Yao
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Zhuo-Zhuo Zhang
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Yong-Jie Wu
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Dan-Ying Huang
- School of Chemical and Environmental Engineering; Wuyi University; Jiangmen 529020 China
| | - Bing-Feng Shi
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
- State Key Laboratory of Elemento-organic Chemistry; Nankai University; Tianjin 300071 China
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15
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Liao G, Yao QJ, Zhang ZZ, Wu YJ, Huang DY, Shi BF. Scalable, Stereocontrolled Formal Syntheses of (+)-Isoschizandrin and (+)-Steganone: Development and Applications of Palladium(II)-Catalyzed Atroposelective C−H Alkynylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713106] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gang Liao
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Qi-Jun Yao
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Zhuo-Zhuo Zhang
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Yong-Jie Wu
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Dan-Ying Huang
- School of Chemical and Environmental Engineering; Wuyi University; Jiangmen 529020 China
| | - Bing-Feng Shi
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
- State Key Laboratory of Elemento-organic Chemistry; Nankai University; Tianjin 300071 China
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16
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Foschi F, Roth T, Enders M, Wadepohl H, Clot E, Gade LH. Isolation and structural characterization of a titanacyclopropane as key intermediate in the double aryl Grignard addition to 2-(arylethynyl)pyridine derivatives. Chem Commun (Camb) 2018; 54:2228-2231. [DOI: 10.1039/c8cc00478a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A titanacyclopropane species, which is a key reaction intermediate in the Ti(OiPr)4-mediated double aryl Grignard addition to 1,2-di(pyridin-2-yl)ethyne and related alkynes, was isolated and fully characterized.
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Affiliation(s)
- Francesco Foschi
- Anorganisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Torsten Roth
- Anorganisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Markus Enders
- Anorganisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Eric Clot
- Institut Charles Gerhardt Montpellier
- UMR 5253 CNRS-UM-ENSCM
- Université de Montpellier
- F-34095 Montpellier Cedex 5
- France
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut
- Universität Heidelberg
- 69120 Heidelberg
- Germany
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17
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Abstract
A convergent total synthesis of (-)-nahuoic acid Ci(Bii) (3), a novel cis-decalin polyketide, has been achieved. Key synthetic transformations include Type II Anion Relay Chemistry (ARC) to construct the polyol chain, a Ti-catalyzed asymmetric Diels-Alder reaction to generate the cis-decalin skeleton, and a late-stage large fragment union exploiting a Micalizio alkoxide-directed alkyne-alkene coupling tactic.
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Affiliation(s)
- Qi Liu
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Yifan Deng
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Amos B. Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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18
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Kier MJ, Leon RM, O'Rourke NF, Rheingold AL, Micalizio GC. Synthesis of Highly Oxygenated Carbocycles by Stereoselective Coupling of Alkynes to 1,3- and 1,4-Dicarbonyl Systems. J Am Chem Soc 2017; 139:12374-12377. [PMID: 28844136 PMCID: PMC5600187 DOI: 10.1021/jacs.7b06286] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Densely substituted and highly oxygenated carbocycles are challenging targets for synthesis. In particular, those possessing numerous contiguous, fully substituted carbon atoms (i.e., tertiary alcohols and quaternary centers) are often not accessible in a direct fashion, necessitating the strategic decoupling of ring-formation from the establishment of functionality about the system. Here, we describe an approach to the construction of highly oxygenated mono-, di-, and polycyclic carbocycles from the reaction of disubstituted alkynes with β- or γ-dicarbonyl systems. These processes embrace a variant of metallacycle-mediated annulation chemistry where initial alkyne-carbonyl coupling is followed by a second, now intramolecular, stereoselective C-C bond-forming event. In addition to revealing the basic reactivity pattern in intermolecular settings, we demonstrate that this class of reactivity is quite powerful in a fully intramolecular context and, when terminated by a stereoselective oxidation process, can be used to generate polycyclic systems containing a fully substituted and highly oxygenated five-membered ring.
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Affiliation(s)
- Matthew J Kier
- Department of Chemistry, Burke Laboratory, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Robert M Leon
- Department of Chemistry, Burke Laboratory, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Natasha F O'Rourke
- Department of Chemistry, Burke Laboratory, Dartmouth College , Hanover, New Hampshire 03755, United States
| | - Arnold L Rheingold
- Department of Chemistry, University of California-San Diego , La Jolla, California 92093, United States
| | - Glenn C Micalizio
- Department of Chemistry, Burke Laboratory, Dartmouth College , Hanover, New Hampshire 03755, United States
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19
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Zubrytski DM, Kananovich DG, Matiushenkov EA. Preparation of stereochemically pure E- and Z-alkenoic acids and their methyl esters from bicyclo[n.1.0]alkan-1-ols. Application in the synthesis of insect pheromones. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s107042801706001x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Levine DR, Messersmith RE, Siegler MA, Tovar JD. Ring fusion isomers of dithienoborepins: perturbations of electronic structure, aromaticity, and reactivity in boron-containing polycyclic heteroaromatics. CAN J CHEM 2017. [DOI: 10.1139/cjc-2016-0493] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Through a combination of rational design and synthetic serendipity, two new structural isomers of the dithienoborepin (DTB) architecture have been realized. Unlike previous members of this family, these boron-containing polycyclic aromatics are unsymmetrical with respect to the fusion orientation of the central borepin and flanking thiophene rings. Characterization of the unsymmetrical dithienoborepins through spectroscopic, crystallographic, electrochemical, and computational methods reveal that the electronics, aromaticity, and chemical reactivity can differ subtly (as for DTB 3) or in dramatic fashion (DTB 4) throughout the series, as dictated by the nature of the unique π-conjugation in each structure. Synthetic elaboration of the three most closely related DTB isomers (1, 2, and 3) into π-extended derivatives by Pd-catalyzed cross-couplings revealed an enhancement in their inherent electronic property differences, demonstrating the feasibility of such an approach for molecular property tuning.
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Affiliation(s)
- David R. Levine
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
| | - Reid E. Messersmith
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
| | - Maxime A. Siegler
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
| | - John D. Tovar
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
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21
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Micalizio GC, Mizoguchi H. The Development of Alkoxide-Directed Metallacycle-Mediated Annulative Cross-Coupling Chemistry. Isr J Chem 2017; 57:228-238. [PMID: 28652644 PMCID: PMC5482546 DOI: 10.1002/ijch.201600098] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Alkoxide-directed metallacycle-mediated cross-coupling is a rapidly growing area of reaction methodology in organic chemistry. Over the last decade, developments have resulted in > thirty new and highly selective intermolecular (or "convergent") C-C bond-forming reactions that have established powerful retrosynthetic relationships in stereoselective synthesis. While early studies were focused on developing transformations that forge a single C-C bond by way of a functionalized and unsaturated metallacyclopentane intermediate, recent advances mark the ability to employ this organometallic intermediate in additional stereoselective transformations. Among these more advanced coupling processes, those that embrace the metallacycle in subsequent [4+2] chemistry have resulted in the realization of a number of highly selective annulative cross-coupling reactions that deliver densely functionalized and angularly substituted carbocycles. This review discusses the early development of this chemistry, recent advances in reaction methodology, and shares a glimpse of the power of these processes in natural product synthesis.
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22
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O'Rourke NF, Kier MJ, Micalizio GC. Metallacycle-Mediated Cross-Coupling in Natural Product Synthesis. Tetrahedron 2016; 72:7093-7123. [PMID: 27765997 PMCID: PMC5067085 DOI: 10.1016/j.tet.2016.08.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Natasha F O'Rourke
- Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH 03755, United States
| | - Matthew J Kier
- Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH 03755, United States
| | - Glenn C Micalizio
- Burke Laboratory, Department of Chemistry, Dartmouth College, Hanover, NH 03755, United States
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23
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Mizoguchi H, Micalizio GC. Synthesis of Angularly Substituted trans-Fused Decalins through a Metallacycle-Mediated Annulative Cross-Coupling Cascade. Angew Chem Int Ed Engl 2016; 55:13099-13103. [PMID: 27634059 PMCID: PMC5056368 DOI: 10.1002/anie.201606962] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Indexed: 01/07/2023]
Abstract
A convergent coupling reaction is described that enables the stereoselective construction of angularly substituted trans-fused decalins from acyclic precursors. The process builds on our alkoxide-directed titanium-mediated alkyne-alkyne coupling and employs a 1,7-enyne coupling partner. Overall, the reaction is thought to proceed through initial formation of a tetrasusbstituted metallacyclopentadiene, stereoselective intramolecular [4+2] cycloaddition, elimination, isomerization, and regio- and stereoselective protonation. Distinct from our early studies directed at the synthesis of trans-fused hydrindanes, the current annulative coupling reveals an important effect of TMSCl in controlling the final protonation-the event that establishes the stereochemistry of the ring fusion.
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Affiliation(s)
- Haruki Mizoguchi
- Department of Chemistry, Dartmouth College, 6128 Burke Laboratory, Hanover, NH, 03755, USA
| | - Glenn C Micalizio
- Department of Chemistry, Dartmouth College, 6128 Burke Laboratory, Hanover, NH, 03755, USA.
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24
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Mizoguchi H, Micalizio GC. Synthesis of Angularly Substituted trans
-Fused Decalins through a Metallacycle-Mediated Annulative Cross-Coupling Cascade. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606962] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Haruki Mizoguchi
- Department of Chemistry; Dartmouth College; 6128 Burke Laboratory Hanover NH 03755 USA
| | - Glenn C. Micalizio
- Department of Chemistry; Dartmouth College; 6128 Burke Laboratory Hanover NH 03755 USA
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25
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Cassidy JS, Mizoguchi H, Micalizio GC. Acceleration of metallacycle-mediated alkyne-alkyne cross-coupling with TMSCl. Tetrahedron Lett 2016; 57:3848-3850. [PMID: 27713588 DOI: 10.1016/j.tetlet.2016.07.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Investigation of titanium-centered metallacycle-mediated cross-coupling between unsymmetrical internal alkynes has led to the discovery that TMSCl significantly accelerates the C-C bond forming event. We report a collection of results that compare the efficiency of this reaction employing Ti(Oi-Pr)4/2n-BuLi in PhMe with and without TMSCl, demonstrating in every case that the presence of TMSCl has a profound impact on efficiency. While relevant in the context of developing this fundamental bond-forming process as an entry to more complex organometallic transformations, these modified reaction conditions allow coupling processes to be run at > 10 times the concentrations previously possible [in 2.4M n-BuLi (hexanes)], without the requirement of additional solvent. Finally, we demonstrate the effectiveness of these modified reaction conditions for the annulative cross-coupling between TMS-alkynes and 1,6-enynes leading to the formation of angularly substituted hydrindanes with, now well appreciated, high levels of regio- and stereoselection.
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Affiliation(s)
- James S Cassidy
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755
| | - Haruki Mizoguchi
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755
| | - Glenn C Micalizio
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755
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26
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Plundrich GT, Wadepohl H, Clot E, Gade LH. η(6) -Arene-Zirconium-PNP-Pincer Complexes: Mechanism of Their Hydrogenolytic Formation and Their Reactivity as Zirconium(II) Synthons. Chemistry 2016; 22:9283-92. [PMID: 27258989 DOI: 10.1002/chem.201601213] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 11/08/2022]
Abstract
The cyclometalated monobenzyl complexes [(Cbzdiphos(R) -CH)ZrBnX] 1 (iPr) Cl and 1 (Ph) I reacted with dihydrogen (10 bar) to yield the η(6) -toluene complexes [(Cbzdiphos(R) )Zr(η(6) -tol)X] 2 (iPr) Cl and 2 (Ph) I (cbzdiphos=1,8-bis(phosphino)-3,6-di-tert-butyl-9H-carbazole). The arene complexes were also found to be directly accessible from the triiodide [(Cbzdiphos(Ph) )ZrI3 ] through an in situ reaction with a dibenzylmagnesium reagent and subsequent hydrogenolysis, as exemplified for the η(6) -mesitylene complex [(Cbzdiphos(Ph) )Zr(η(6) -mes)I] (3 (Ph) I). The tolyl-ring in 2 (iPr) Cl adopts a puckered arrangement (fold angle 23.3°) indicating significant arene-1,4-diido character. Deuterium labeling experiments were consistent with an intramolecular reaction sequence after the initial hydrogenolysis of a Zr-C bond by a σ-bond metathesis. A DFT study of the reaction sequence indicates that hydrogenolysis by σ-bond metathesis first occurs at the cyclometalated ancillary ligand giving a hydrido-benzyl intermediate, which subsequently reductively eliminates toluene that then coordinates to the Zr atom as the reduced arene ligand. Complex 2 (Ph) I was reacted with 2,6-diisopropylphenyl isocyanide giving the deep blue, diamagnetic Zr(II) -diisocyanide complex [(Cbzdiphos(Ph) )Zr(CNDipp)2 I] (4 (Ph) I). DFT modeling of 4 (Ph) I demonstrated that the HOMO of the complex is primarily located as a "lone pair on zirconium", with some degree of back-bonding into the C≡N π* bond, and the complex is thus most appropriately described as a zirconium(II) species. Reaction of 2 (Ph) I with trimethylsilylazide (N3 TMS) and 2 (iPr) Cl with 1-azidoadamantane (N3 Ad) resulted in the formation of the imido complexes [(Cbzdiphos(R) )Zr=NR'(X)] 5 (iPr) Cl-NAd and 5 (Ph) I-NTMS, respectively. Reaction of 2 (iPr) Cl with azobenzene led to N-N bond scission giving 6 (iPr) Cl, in which one of the NPh-fragments is coupled with the carbazole nitrogen to form a central η(2) -bonded hydrazide(-1), whereas the other NPh-fragment binds to zirconium acting as an imido-ligand. Finally, addition of pyridine to 2 (iPr) Cl yielded the dark purple complex [(Cbzdiphos(iPr) )Zr(bpy)Cl] (7 (iPr) Cl) through a combination of CH-activation and C-C-coupling. The structural data and UV/Vis spectroscopic properties of 7 (iPr) Cl indicate that the bpy (bipyridine) may be regarded as a (dianionic) diamido-type ligand.
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Affiliation(s)
- Gudrun T Plundrich
- Anorganisch Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Eric Clot
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, cc 1501, Place Eugène Bataillon, 34095, Montpellier Cedex 5, France.
| | - Lutz H Gade
- Anorganisch Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.
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27
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Szeto KC, Sahyoun W, Merle N, Castelbou JL, Popoff N, Lefebvre F, Raynaud J, Godard C, Claver C, Delevoye L, Gauvin RM, Taoufik M. Development of silica-supported frustrated Lewis pairs: highly active transition metal-free catalysts for the Z-selective reduction of alkynes. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01372k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Supported Lewis acid/base systems based have been prepared and characterized.
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28
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Kamitani M, Searles K, Chen CH, Carroll PJ, Mindiola DJ. β-Hydrogen Abstraction of an Ethyl Group Provides Entry to Titanium and Zirconium Ethylene Complexes. Organometallics 2015. [DOI: 10.1021/om501226k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Masahiro Kamitani
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Keith Searles
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Chun-Hsing Chen
- Department
of Chemistry and Molecular Structure Center, Indiana University, Bloomington, Indiana 47405, United States
| | - Patrick J. Carroll
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Daniel J. Mindiola
- Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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29
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Silwal S, Rahaim RJ. Regioselective Synthesis of Enones via a Titanium-Promoted Coupling of Unsymmetrical Alkynes with Weinreb Amides. J Org Chem 2014; 79:8469-76. [DOI: 10.1021/jo5014417] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sajan Silwal
- Department
of Chemistry, Oklahoma State University, 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
| | - Ronald J. Rahaim
- Department
of Chemistry, Oklahoma State University, 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
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30
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Hermant F, Urbańska E, Seizilles de Mazancourt S, Maubert T, Nicolas E, Six Y. Reductive Alkylation of Thioamides with Grignard Reagents in the Presence of Ti(OiPr)4: Insight and Extension. Organometallics 2014. [DOI: 10.1021/om500603v] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fabien Hermant
- Laboratoire
de Synthèse Organique (DCSO), UMR 7652 CNRS/Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Ewelina Urbańska
- Laboratoire
de Synthèse Organique (DCSO), UMR 7652 CNRS/Ecole Polytechnique, 91128 Palaiseau Cedex, France
- Faculty
of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100 Toruń, Poland
| | | | - Thomas Maubert
- Laboratoire
de Synthèse Organique (DCSO), UMR 7652 CNRS/Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Emmanuel Nicolas
- Laboratoire
de Chimie Moléculaire (LCM), UMR 9168 CNRS/Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Yvan Six
- Laboratoire
de Synthèse Organique (DCSO), UMR 7652 CNRS/Ecole Polytechnique, 91128 Palaiseau Cedex, France
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31
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Hermant F, Nicolas E, Six Y. Ti-mediated intramolecular cyclopropanation of N-alkenyl thioamides: scope and mechanistic study. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Rassadin VA, Six Y. A study of the reaction of n-BuLi with Ti(Oi-Pr)4 as a method to generate titanacyclopropane and titanacyclopropene species. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Satoh Y, Obora Y. Early Transition Niobium Compounds in Organic Transformation^|^mdash;From Stoichiometric Reaction to Catalytic Reaction. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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34
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Ozaki M, Obora Y, Tada Y, Ishii Y. Generation of low-valent alkoxy niobium from Nb(OEt)5 and Grignard reagents and their use as catalysts in the cyclotrimerization of isocyanates. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.05.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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35
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Shintaku K, Nishino Y, Maeda H, Segi M. Synthetic transformation of homopropargylic selenides to conjugated diene-substituted alcohols and amines using diisopropoxy(η2-alkyne)titanium intermediates. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Oger C, Balas L, Durand T, Galano JM. Are alkyne reductions chemo-, regio-, and stereoselective enough to provide pure (Z)-olefins in polyfunctionalized bioactive molecules? Chem Rev 2012. [PMID: 23194255 DOI: 10.1021/cr3001753] [Citation(s) in RCA: 251] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Camille Oger
- Institut des Biomolécules Max Mousseron, UMR CNRS 5247, Université Montpellier 1, Faculté de Pharmacie, 15 av. Charles Flahault, Bât. D, 34093 Montpellier Cedex 05, France
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37
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Greszler SN, Reichard HA, Micalizio GC. Asymmetric synthesis of dihydroindanes by convergent alkoxide-directed metallacycle-mediated bond formation. J Am Chem Soc 2012; 134:2766-74. [PMID: 22235773 DOI: 10.1021/ja2105043] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A convergent synthesis of highly substituted and stereodefined dihydroindanes is described from alkoxide-directed Ti-mediated cross-coupling of internal alkynes with substituted 4-hydroxy-1,6-enynes (substrates that derive from 2-directional functionalization of readily available epoxy alcohol derivatives). In addition to describing a new and highly stereoselective approach to bimolecular [2 + 2 + 2] annulation that delivers products not available with other methods in this area of chemical reactivity, evidence is provided to support annulation by way of regioselective alkyne-alkyne coupling, followed by metal-centered [4 + 2] rather than stepwise alkene insertion and reductive elimination. Overall, the reaction proceeds with exquisite stereochemical control and defines a convenient, convergent, and enantiospecific entry to fused carbocycles of great potential value in target-oriented synthesis and medicinal chemistry.
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Affiliation(s)
- Stephen N Greszler
- Department of Chemistry, The Scripps Research Institute, Scripps Florida, Jupiter, Florida 33458, USA
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38
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Schäfer C, Miesch M, Miesch L. Intramolecular reductive ketone–alkynoate coupling reaction promoted by (η2-propene)titanium. Org Biomol Chem 2012; 10:3253-7. [DOI: 10.1039/c2ob07049a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Abstract
This chapter offers a general review of the evolvement of methods for the stereoselective synthesis of Z-alkenes, with a focus on the development of catalytic systems towards this goal in recent years.
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Affiliation(s)
- Woon-Yew Siau
- Department of Chemistry, National University of Singapore, Singapore, Singapore
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40
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Wu J, Panek JS. Total synthesis of (-)-virginiamycin M2: application of crotylsilanes accessed by enantioselective Rh(II) or Cu(I) promoted carbenoid Si-H insertion. J Org Chem 2011; 76:9900-18. [PMID: 22070230 DOI: 10.1021/jo202119p] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A stereoselective synthesis of the antibiotic (-)-virginiamycin M(2) is detailed. A convergent strategy was utilized that proceeded in 10 steps (longest linear sequence) from enantioenriched silane (S)-15. This reagent, which was prepared via a Rh(II)- or Cu(I)-catalyzed carbenoid Si-H insertion, was used to introduce the desired olefin geometry and stereocenters of the C1-C5 propionate subunit. A modified Negishi cross-coupling or an efficient alkoxide-directed titanium-mediated alkyne-alkyne reductive coupling strategy was utilized to assemble the trisubstituted (E,E)-diene. An underutilized late-stage SmI(2)-mediated macrocyclization was employed to construct the 23-membered macrocycle scaffold of the natural product.
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Affiliation(s)
- Jie Wu
- Department of Chemistry and Center for Chemical Methodology and Library Development, Metcalf Center for Science and Engineering, 590 Commonwealth Avenue, Boston University, Boston, Massachusetts 02215, USA
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41
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Canterbury DP, Micalizio GC. A convergent route to the CDEF-tetracycle of pectenotoxin-2. Org Lett 2011; 13:2384-7. [PMID: 21476517 DOI: 10.1021/ol200627d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A convergent synthesis of the CDEF-tetracyclic region of pectenotoxin-2 (PTX-2) is described. The synthetic pathway derives from a head-to-tail union of 2 equiv of linalool to establish a stereodefined DEF-tricyclic aldehyde. Subsequent coupling with a "northern" fragment enolate, followed by a tandem Sharpless epoxidation/cyclization, delivers the C10-C26 polycyclic region of the natural product.
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Affiliation(s)
- Daniel P Canterbury
- Department of Chemistry, The Scripps Research Institute, Jupiter, Florida 33458, United States
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Oger C, Bultel-Poncé V, Guy A, Balas L, Rossi JC, Durand T, Galano JM. The handy use of Brown's P2-Ni catalyst for a skipped diyne deuteration: application to the synthesis of a [D4]-labeled F4t-neuroprostane. Chemistry 2011; 16:13976-80. [PMID: 21077063 DOI: 10.1002/chem.201002304] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Camille Oger
- Institut des Biomolécules Max Mousseron, UMR CNRS 5247, UM1 & UM2, 15, avenue Charles Flahault, Faculté de Pharmacie, Bâtiment D, 34093 Montpellier cedex 05, France
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Zhao F, Zhang S, Xi Z. Silyl-substituted 1,3-butadienes for Diels–Alder reaction, ene reaction and allylation reaction. Chem Commun (Camb) 2011; 47:4348-57. [DOI: 10.1039/c0cc05665k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Reichard HA, Micalizio GC. Metallacycle-Mediated Cross-Coupling with Substituted and Electronically Unactivated Alkenes. Chem Sci 2011; 4:573-589. [PMID: 21436986 DOI: 10.1039/c0sc00394h] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This perspective surveys the history of- and recent advances in- metallacycle-mediated coupling chemistry of substituted alkenes. While the reaction of preformed metal-π complexes with ethylene was reported nearly 30 years ago, the generalization of this mode of bimolecular C-C bond formation to the regio- and stereoselective union of complex substrates has only recently begun to emerge. This perspective discusses early observations in this area, the challenges associated with controlling such processes, the evolution of a general strategy to overcome these challenges, and a summary of highly regio- and stereoselective convergent coupling reactions that are currently available by metallacycle-mediated cross-coupling with substituted alkenes.
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Affiliation(s)
- Holly A Reichard
- The Department of Chemistry, The Scripps Research Institute; Scripps-Florida, 130 Scripps Way #3A2, Jupiter, FL 33418, USA. ; Tel: 561 228 2463;
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Barlan AU, Micalizio GC. The regio- and stereochemical course of reductive cross-coupling reactions between 1,3-disubstituted allenes and vinylsilanes: Synthesis of ( Z)-dienes. Tetrahedron 2010; 66:4775-4783. [PMID: 24031099 PMCID: PMC3769195 DOI: 10.1016/j.tet.2010.02.062] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In investigations aimed at exploring the potential of disubstituted allenes in stereoselective synthesis, we report studies that explore the reductive cross-coupling reaction of vinylsilanes with a range of substituted allenes. Regiochemical control is attained by employing allenic alkoxides, where the proximal heteroatom dictates the site-selectivity in a process that proceeds by net formal metallo-[3,3] rearrangement (directed carbometalation/elimination). Stereoselectivity in these reactions is complex, with both the nature of allene substitution and relative stereochemistry of the substrate impacting the stereoselective generation of each alkene of a substituted 1,3-diene. 2009 Elsevier Ltd. All rights reserved.
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Affiliation(s)
- Allan U Barlan
- Department of Chemistry, The Scripps Research Institute, Scripps Florida, Jupiter, FL 33458
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Wolan A, Six Y. Synthetic transformations mediated by the combination of titanium(IV) alkoxides and Grignard reagents: selectivity issues and recent applications. Part 2: Reactions of alkenes, allenes and alkynes. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.01.079] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Reichard HA, McLaughlin M, Chen MZ, Micalizio GC. Regioselective Reductive Cross-Coupling Reactions of Unsymmetrical Alkynes. European J Org Chem 2010; 2010:391-409. [PMID: 24634606 PMCID: PMC3951371 DOI: 10.1002/ejoc.200901094] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Indexed: 12/17/2022]
Abstract
The present microreview summarizes our progress over the last few years in defining regioselective reductive cross-coupling reactions of unsymmetrical alkynes with terminal- and internal alkynes, aldehydes, and imines. We begin with a brief historical perspective of metal-mediated reductive dimerization reactions of aromatic alkynes and discuss the challenges associated with "crossed" versions of this mode of reactivity. Next, a collection of available methods that allow for regioselective reductive cross-coupling of internal alkynes with terminal and internal alkynes, aldehydes, and imines is summarized. After an examination of the requirements for regioselectivity in these cases, the logic behind our design of alkoxide-directed titanium-mediated reductive cross-coupling reactions is presented. A nomenclature is introduced to delineate the presumed mechanistic origin of regioselection associated with each reaction design, and a presentation of alkoxide-directed regioselective reductive cross-coupling reactions of alkynes follows. Throughout, principal issues related to reactivity and selectivity are discussed to assess scope and limitations of available methods and to describe the broad challenges that exist for defining complex fragment union reactions based on reductive cross-coupling chemistry.
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Affiliation(s)
| | | | | | - Glenn C. Micalizio
- Department of Chemistry, The Scripps Research Institute Scripps-Florida 130 Scripps Way #3A2 Jupiter, FL 33458 Fax: (561) 228-3092
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Hanamoto T, Yamada K. Generation and reactions of trifluoromethylethenyl titanium(II) species. J Org Chem 2009; 74:7559-61. [PMID: 19715289 DOI: 10.1021/jo901392n] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of (trifluoromethyl)dimethylphenylsilylacetylene and (eta(2)-propene)Ti(O(i)Pr)(2) generated in situ smoothly proceeded giving the corresponding (eta(2)-1-dimethylphenylsilyl-2-trifluoromethylalkyne)Ti(O(i)Pr)(2), which reacted with aldehydes and ketones to afford the corresponding addition products in good yields with good to excellent regioselectivity.
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Affiliation(s)
- Takeshi Hanamoto
- Department of Chemistry and Applied Chemistry, Saga University, Honjyo-machi 1, Saga 840-8502, Japan.
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