51
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Pérez M, Fañanás-Mastral M, Hornillos V, Rudolph A, Bos PH, Harutyunyan SR, Feringa BL. Asymmetric allylic alkylation of acyclic allylic ethers with organolithium reagents. Chemistry 2012; 18:11880-3. [PMID: 22907628 DOI: 10.1002/chem.201202251] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Indexed: 11/11/2022]
Abstract
A highly efficient, regio- and enantioselective Cu(I)/phosphoramidite-catalyzed asymmetric allylic alkylation of allyl ethers with organolithium reagents is reported (see scheme). The use of organolithium reagents is essential for this catalytic C-C bond formation due to their compatibility with different Lewis acids. The versatility of allylic ethers under the copper-catalyzed reaction conditions with organolithium reagents is demonstrated in the shortest synthesis of (S)-Arundic acid.
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Affiliation(s)
- Manuel Pérez
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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52
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Madduri AVR, Harutyunyan SR, Minnaard AJ. Asymmetric Copper-Catalyzed Addition of Grignard Reagents to Aryl Alkyl Ketones. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201109040] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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53
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Madduri AVR, Harutyunyan SR, Minnaard AJ. Asymmetric copper-catalyzed addition of Grignard reagents to aryl alkyl ketones. Angew Chem Int Ed Engl 2012; 51:3164-7. [PMID: 22334477 DOI: 10.1002/anie.201109040] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Ashoka V R Madduri
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747 AG, Groningen, The Netherlands
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54
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Fañanás-Mastral M, Pérez M, Bos PH, Rudolph A, Harutyunyan SR, Feringa BL. Enantioselective Synthesis of Tertiary and Quaternary Stereogenic Centers: Copper/Phosphoramidite-Catalyzed Allylic Alkylation with Organolithium Reagents. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107840] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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55
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Fañanás-Mastral M, Pérez M, Bos PH, Rudolph A, Harutyunyan SR, Feringa BL. Enantioselective synthesis of tertiary and quaternary stereogenic centers: copper/phosphoramidite-catalyzed allylic alkylation with organolithium reagents. Angew Chem Int Ed Engl 2012; 51:1922-5. [PMID: 22262571 DOI: 10.1002/anie.201107840] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Revised: 12/09/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Martín Fañanás-Mastral
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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56
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Bos PH, Rudolph A, Pérez M, Fañanás-Mastral M, Harutyunyan SR, Feringa BL. Copper-catalyzed asymmetric ring opening of oxabicyclic alkenes with organolithium reagents. Chem Commun (Camb) 2012; 48:1748-50. [PMID: 22215200 DOI: 10.1039/c2cc16855c] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Pieter H Bos
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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57
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Madduri AVR, Minnaard AJ, Harutyunyan SR. Access to chiral α-bromo and α-H-substituted tertiary allylic alcohols via copper(i) catalyzed 1,2-addition of Grignard reagents to enones. Org Biomol Chem 2012; 10:2878-84. [DOI: 10.1039/c2ob25080b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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58
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Madduri AVR, Minnaard AJ, Harutyunyan SR. Copper(I) catalyzed asymmetric 1,2-addition of Grignard reagents to α-methyl substituted α,β-unsaturated ketones. Chem Commun (Camb) 2011; 48:1478-80. [PMID: 22124420 DOI: 10.1039/c1cc16725a] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first catalytic enantioselective 1,2-addition of Grignard reagents to ketones is presented. This additive-free copper(I) catalyzed 1,2-addition provides chiral allylic tertiary alcohols with an er of up to 98:2 and excellent yields due to the complete shift of overwhelming 1,4-selectivity of copper(I)-catalysts towards 1,2-selectivity in the addition reaction to enones.
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Affiliation(s)
- Ashoka V R Madduri
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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59
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Kudernac T, Ruangsupapichat N, Parschau M, Maciá B, Katsonis N, Harutyunyan SR, Ernst KH, Feringa BL. Electrically driven directional motion of a four-wheeled molecule on a metal surface. Nature 2011; 479:208-11. [PMID: 22071765 DOI: 10.1038/nature10587] [Citation(s) in RCA: 486] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 09/15/2011] [Indexed: 11/09/2022]
Abstract
Propelling single molecules in a controlled manner along an unmodified surface remains extremely challenging because it requires molecules that can use light, chemical or electrical energy to modulate their interaction with the surface in a way that generates motion. Nature's motor proteins have mastered the art of converting conformational changes into directed motion, and have inspired the design of artificial systems such as DNA walkers and light- and redox-driven molecular motors. But although controlled movement of single molecules along a surface has been reported, the molecules in these examples act as passive elements that either diffuse along a preferential direction with equal probability for forward and backward movement or are dragged by an STM tip. Here we present a molecule with four functional units--our previously reported rotary motors--that undergo continuous and defined conformational changes upon sequential electronic and vibrational excitation. Scanning tunnelling microscopy confirms that activation of the conformational changes of the rotors through inelastic electron tunnelling propels the molecule unidirectionally across a Cu(111) surface. The system can be adapted to follow either linear or random surface trajectories or to remain stationary, by tuning the chirality of the individual motor units. Our design provides a starting point for the exploration of more sophisticated molecular mechanical systems with directionally controlled motion.
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Affiliation(s)
- Tibor Kudernac
- Centre for Systems Chemistry, Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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60
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Ruangsupapichat N, Pollard MM, Harutyunyan SR, Feringa BL. Reversing the direction in a light-driven rotary molecular motor. Nat Chem 2010; 3:53-60. [DOI: 10.1038/nchem.872] [Citation(s) in RCA: 165] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Accepted: 09/14/2010] [Indexed: 11/09/2022]
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61
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Harutyunyan SR, den Hartog T, Geurts K, Minnaard AJ, Feringa BL. Catalytic asymmetric conjugate addition and allylic alkylation with Grignard reagents. Chem Rev 2008; 108:2824-52. [PMID: 18698733 DOI: 10.1021/cr068424k] [Citation(s) in RCA: 647] [Impact Index Per Article: 40.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Syuzanna R Harutyunyan
- Organic Chemistry Laboratories, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
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62
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de Boer JW, Browne WR, Harutyunyan SR, Bini L, Tiemersma-Wegman TD, Alsters PL, Hage R, Feringa BL. Manganese catalysed asymmetric cis-dihydroxylation with H2O2. Chem Commun (Camb) 2008:3747-9. [DOI: 10.1039/b808355j] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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63
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Gevorkian ZS, Harutyunyan SR, Ananikian NS, Arakelian VH, Ayvazyan RB, Gavalyan VB, Grigorian NK, Vardanyan HS, Sahakian VH, Hakobyan AA. Observation of resonant diffusive radiation in random multilayered systems. Phys Rev Lett 2006; 97:044801. [PMID: 16907579 DOI: 10.1103/physrevlett.97.044801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2006] [Indexed: 05/11/2023]
Abstract
Diffusive radiation is a new type of radiation predicted to occur in randomly inhomogeneous media due to the multiple scattering of pseudophotons. This theoretical effect is now observed experimentally. The radiation is generated by the passage of electrons of energy 200 KeV-2.2 MeV through a random stack of films in the visible light region. The radiation intensity increases resonantly provided the Cerenkov condition is satisfied for the average dielectric constant of the medium. The observed angular dependence and electron resonance energy are in agreement with the theoretical predictions. These observations open a road to application of diffusive radiation in particle detection, astrophysics, soft-x-ray generation, etc.
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Affiliation(s)
- Zh S Gevorkian
- Yerevan Physics Institute, Alikhanian Brothers Street 2, Yerevan 375036, Armenia
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64
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Harutyunyan SR, López F, Browne WR, Correa A, Peña D, Badorrey R, Meetsma A, Minnaard AJ, Feringa BL. On the Mechanism of the Copper-Catalyzed Enantioselective 1,4-Addition of Grignard Reagents to α,β-Unsaturated Carbonyl Compounds. J Am Chem Soc 2006; 128:9103-18. [PMID: 16834384 DOI: 10.1021/ja0585634] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of the enantioselective 1,4-addition of Grignard reagents to alpha,beta-unsaturated carbonyl compounds promoted by copper complexes of chiral ferrocenyl diphosphines is explored through kinetic, spectroscopic, and electrochemical analysis. On the basis of these studies, a structure of the active catalyst is proposed. The roles of the solvent, copper halide, and the Grignard reagent have been examined. Kinetic studies support a reductive elimination as the rate-limiting step in which the chiral catalyst, the substrate, and the Grignard reagent are involved. The thermodynamic activation parameters were determined from the temperature dependence of the reaction rate. The putative active species and the catalytic cycle of the reaction are discussed.
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Affiliation(s)
- Syuzanna R Harutyunyan
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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65
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Des Mazery R, Pullez M, López F, Harutyunyan SR, Minnaard AJ, Feringa BL. An Iterative Catalytic Route to Enantiopure Deoxypropionate Subunits: Asymmetric Conjugate Addition of Grignard Reagents to α,β-Unsaturated Thioesters. J Am Chem Soc 2005; 127:9966-7. [PMID: 16011337 DOI: 10.1021/ja053020f] [Citation(s) in RCA: 187] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly enantioselective (up to 96% ee) conjugate addition of Grignard reagents, in particular, MeMgBr, to alpha,beta-unsaturated thioesters is provided as well as its application to a diastereo- and enantioselective iterative route to syn- and anti-1,3-dimethyl arrays and deoxypropionate subunits. The versatility of the method is illustrated in the synthesis of (-)-lardolure, a multimethyl-branched insect natural pheromone.
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Affiliation(s)
- Renaud Des Mazery
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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66
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López F, Harutyunyan SR, Meetsma A, Minnaard AJ, Feringa BL. Copper‐Catalyzed Enantioselective Conjugate Addition of Grignard Reagents to α,β‐Unsaturated Esters. Angew Chem Int Ed Engl 2005; 44:2752-2756. [PMID: 15825212 DOI: 10.1002/anie.200500317] [Citation(s) in RCA: 138] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fernando López
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, Fax: (+31) 50-363-4296
| | - Syuzanna R Harutyunyan
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, Fax: (+31) 50-363-4296
| | - Auke Meetsma
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, Fax: (+31) 50-363-4296
| | - Adriaan J Minnaard
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, Fax: (+31) 50-363-4296
| | - Ben L Feringa
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands, Fax: (+31) 50-363-4296
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67
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López F, Harutyunyan SR, Meetsma A, Minnaard AJ, Feringa BL. Copper-Catalyzed Enantioselective Conjugate Addition of Grignard Reagents to α,β-Unsaturated Esters. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200500317] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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68
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López F, Harutyunyan SR, Minnaard AJ, Feringa BL. Copper-Catalyzed Enantioselective Conjugate Addition of Grignard Reagents to Acyclic Enones. J Am Chem Soc 2004; 126:12784-5. [PMID: 15469267 DOI: 10.1021/ja046632t] [Citation(s) in RCA: 120] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A highly enantioselective Cu-catalyzed addition of Grignard reagents to acyclic aliphatic enones is described. In the presence of 5 mol % of CuBr.SMe2 and 6 mol % of JosiPhos diphosphine aliphatic enones react with Grignard reagents to provide beta-substituted linear ketones with high yields, regio-, and enantioselectivities.
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Affiliation(s)
- Fernando López
- Department of Organic Chemistry and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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69
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Feringa BL, Badorrey R, Peña D, Harutyunyan SR, Minnaard AJ. Copper-catalyzed asymmetric conjugate addition of Grignard reagents to cyclic enones. Proc Natl Acad Sci U S A 2004; 101:5834-8. [PMID: 15075388 PMCID: PMC395995 DOI: 10.1073/pnas.0308008101] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
It is no longer necessary to use dialkylzinc reagents to obtain enantioselectivities >95% in the copper-catalyzed asymmetric conjugate addition of organometallic compounds to cyclic enones. We now report how this can be accomplished by using inexpensive and readily available Grignard reagents. Screening of bidentate ligands provided outstanding results with copper complexes of commercially available chiral ferrocenyl-based diphosphines, in particular TaniaPhos and JosiPhos derivatives. These catalysts tolerate a range of Grignard reagents and different cyclic enones as substrates, leading to high regioselectivities and unprecedented enantioselectivities. Moreover, the reactions are successful with moderate catalyst loading (5 mol %) under mild conditions and in the absence of additives.
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Affiliation(s)
- Ben L Feringa
- Department of Organic and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
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70
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Peña D, López F, Harutyunyan SR, Minnaard AJ, Feringa BL. Highly enantioselective Cu-catalysed asymmetric 1,4-addition of diphenylzinc to cyclohexenone. Chem Commun (Camb) 2004:1836-7. [PMID: 15306908 DOI: 10.1039/b402868f] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly enantioselective Cu-catalysed 1,4-addition of diphenylzinc to cyclohexenone has been achieved for the first time using a monodentate phosphoramidite ligand.
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Affiliation(s)
- Diego Peña
- Department of Organic and Molecular Inorganic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
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71
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Belokon YN, Bespalova NB, Churkina TD, Císarová I, Ezernitskaya MG, Harutyunyan SR, Hrdina R, Kagan HB, Kocovský P, Kochetkov KA, Larionov OV, Lyssenko KA, North M, Polásek M, Peregudov AS, Prisyazhnyuk VV, Vyskocil S. Synthesis of alpha-amino acids via asymmetric phase transfer-catalyzed alkylation of achiral nickel(II) complexes of glycine-derived Schiff bases. J Am Chem Soc 2003; 125:12860-71. [PMID: 14558835 DOI: 10.1021/ja035465e] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Achiral, diamagnetic Ni(II) complexes 1 and 3 have been synthesized from Ni(II) salts and the Schiff bases, generated from glycine and PBP (7) and PBA (11), respectively, in MeONa/MeOH solutions. The requisite carbonyl-derivatizing agents pyridine-2-carboxylic acid(2-benzoyl-phenyl)-amide 7 (PBP) and pyridine-2-carboxylic acid(2-formyl-phenyl)-amide 11 (PBA) were readily prepared from picolinic acid and o-aminobenzophenone or picolinic acid and methyl o-anthranilate, respectively. The structure of 1 was established by X-ray crystallography. Complexes 1 and 3 were found to undergo C-alkylation with alkyl halides under PTC conditions in the presence of beta-naphthol or benzyltriethylammonium bromide as catalysts to give mono- and bis-alkylated products, respectively. Decomposition of the complexes with aqueous HCl under mild conditions gave the required amino acids, and PBP and PBA were recovered. Alkylation of 1 with highly reactive alkyl halides, carried out under the PTC conditions in the presence of 10% mol of (S)- or (R)-2-hydroxy-2'-amino-1,1'-binaphthyl 31a (NOBIN) and/or its N-acyl derivatives and by (S)- or (R)-2-hydroxy-8'-amino-1,1'-binaphthyl 32a (iso-NOBIN) and its N-acyl derivatives, respectively, gave rise to alpha-amino acids with high enantioselectivities (90-98.5% ee) in good-to-excellent chemical yields at room temperature within several minutes. An unusually large positive nonlinear effect was observed in these reactions. The Michael addition of acrylic derivatives 37 to 1 was conducted under similar conditions with up to 96% ee. The (1)H NMR and IR spectra of a mixture of the sodium salt of NOBIN and 1 indicated formation of a complex between the two components. Implications of the association and self-association of NOBIN for the observed sense of asymmetric induction and nonlinear effects are discussed.
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Affiliation(s)
- Yuri N Belokon
- A. N. Nesmeyanov Institute of Organo-Element Compounds, Russian Academy of Sciences, 117813, Moscow, Vavilov 28, Russian Federation.
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72
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Vyskočil Š, Meca L, Tišlerová I, Císařová I, Polášek M, Harutyunyan SR, Belokon YN, Stead RMJ, Farrugia L, Lockhart SC, Mitchell WL, Kočovský P. 2,8′-Disubstituted-1,1′-Binaphthyls: A New Pattern in Chiral Ligands. Chemistry 2002. [DOI: 10.1002/1521-3765(20021018)8:20%3c4633::aid-chem4633%3e3.0.co%3b2-n] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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73
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Vyskocil S, Meca L, Tislerová I, Císarová I, Polásek M, Harutyunyan SR, Belokon YN, Stead RMJ, Farrugia L, Lockhart SC, Mitchell WL, Kocovský P. 2,8'-disubstituted-1,1'-binaphthyls: a new pattern in chiral ligands. Chemistry 2002; 8:4633-48. [PMID: 12561104 DOI: 10.1002/1521-3765(20021018)8:20<4633::aid-chem4633>3.0.co;2-n] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The title binaphthyls 19 and 26, which are the positional isomers of 2-methoxy-2'-(diphenylphosphino)-1,1'-binaphthyl (MOP, 19) and 2-amino-2'-hydroxy-1,1'-binaphthyl (NOBIN, 26), have been synthesized by Suzuki coupling as the key step (10 + 15-->18), followed by functional group transformations, involving C-P and C-N bond formation (18-->19 and 18-->23). Racemic intermediate 22 was resolved by co-crystallization with N-benzylcinchonidinium chloride and the absolute configuration determined by X-ray crystallography. These novel binaphthyls are configurationally stable and, as such, potentially usable as chiral ligands in asymmetric reactions. Michael addition of the glycine-derived enolate 40 to methyl acrylate, carried out in the presence of (R)-(-)-27 as the chiral phase-transfer catalyst, afforded L-glutamic acid (S)-(+)-43 of 92% ee (after hydrolysis of the primary product).
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Affiliation(s)
- Stĕpán Vyskocil
- Department of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK.
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74
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Belokon YN, Kochetkov KA, Churkina TD, Ikonnikov NS, Larionov OV, Harutyunyan SR, Vyskočil Š, North M, Kagan HB. Highly Efficient Catalytic Synthesis ofα-Amino Acids under Phase-Transfer Conditions with a Novel Catalyst/Substrate Pair. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010518)113:10<2002::aid-ange2002>3.0.co;2-b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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75
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Belokon YN, Kochetkov KA, Churkina TD, Ikonnikov NS, Larionov OV, Harutyunyan SR, Vyskočil Š, North M, Kagan HB. Highly Efficient Catalytic Synthesis ofα-Amino Acids under Phase-Transfer Conditions with a Novel Catalyst/Substrate Pair. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3773(20010518)40:10<1948::aid-anie1948>3.0.co;2-o] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Belokon YN, Kochetkov KA, Churkina TD, Ikonnikov NS, Larionov OV, Harutyunyan SR, Vyskocil S, North M, Kagan HB. Highly Efficient Catalytic Synthesis of alpha-Amino Acids under Phase-Transfer Conditions with a Novel Catalyst/Substrate Pair This work was supported by an ISTC (grant A-356), by the Russian Foundation for Basic Research (Project No 99-03-32970), the Grant Agency of the Czech Republic (Grant No. 203/00/0601), and also by the Grant Agency of Charles University (Grant No. 18/98). We thank Prof. Pavel Kocovský for encouragement and proofreading the manuscript. Angew Chem Int Ed Engl 2001; 40:1948-1951. [PMID: 11385682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- Yuri N. Belokon
- A. N. Nesmeyanov Institute of Organo-Element Compounds Russian Academy of Sciences, 117813 Moscow, Vavilov 28 (Russia)
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