51
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Kimura T, Tsuru T, Momochi H, Satoh T. Configurational Stability of Optically Active Dichloromethylp-Tolyl Sulfoxide and Its Anionic Species: Experimental and Theoretical Study. HETEROATOM CHEMISTRY 2013. [DOI: 10.1002/hc.21074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tsutomu Kimura
- Department of Chemistry, Faculty of Science; Tokyo University of Science; Tokyo; 162-0826; Japan
| | - Takahiro Tsuru
- Graduate School of Chemical Sciences and Technology; Tokyo University of Science; Tokyo; 162-0826; Japan
| | - Hitoshi Momochi
- Graduate School of Chemical Sciences and Technology; Tokyo University of Science; Tokyo; 162-0826; Japan
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52
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Kimura T, Nishimura Y, Ishida N, Momochi H, Yamashita H, Satoh T. A novel consecutive reaction of lithium acetylides with 2-aryl-1-chlorovinyl p-tolyl sulfoxides leading to the formation of (Z)-enediynes. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.152] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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53
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Satoh T, Kimura T. New Synthetic Methods by Using the Electrophilic Nature of Magnesium Carbenoids: Recent Progress and Elucidation of the Essence of the Reactivity by DFT Calculation. J SYN ORG CHEM JPN 2013. [DOI: 10.5059/yukigoseikyokaishi.71.1033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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54
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Nishimura RH, Toledo FT, Lopes JL, Clososki GC. Efficient synthesis of chlorohydrins using ClCH2MgCl·LiCl. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.10.132] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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55
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Unsinn A, Dunst C, Knochel P. Stereoselective synthesis of tetrasubstituted alkenes via a sequential carbocupration and a new sulfur-lithium exchange. Beilstein J Org Chem 2012; 8:2202-6. [PMID: 23365630 PMCID: PMC3556915 DOI: 10.3762/bjoc.8.248] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 12/05/2012] [Indexed: 11/24/2022] Open
Abstract
We have designed a new sequential carbocupration and sulfur-lithium exchange that leads stereo- and regioselectively to trisubstituted alkenyllithiums. Subsequent trapping with various electrophiles yields tetrasubstituted olefins with good control of the double-bond geometry (E/Z ratio up to 99:1). The novel sulfur-lithium exchange could be extended to the stereoselective preparation of Z-styryl lithium derivatives with almost complete retention of the double-bond geometry.
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Affiliation(s)
- Andreas Unsinn
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Cora Dunst
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
| | - Paul Knochel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany
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56
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57
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Hampel T, Neubauer T, van Leeuwen T, Bach T. Stereoselective Preparation of (E)-Configured 1,2-Disubstituted Propenes from Two Aldehydes by a Two-Carbon Stitching Strategy: Convergent Synthesis of 18,21-Diisopropyl-Geldanamycin Hydroquinone and Its C7 Epimer. Chemistry 2012; 18:10382-92. [DOI: 10.1002/chem.201201600] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Indexed: 11/07/2022]
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58
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New synthesis of multi-substituted α-chlorocyclobutanones from 1-chloro-3-cyanoalkyl p-tolyl sulfoxides by 4-Exo-Dig nucleophilic ring closure of magnesium carbenoids to nitrile group as the key reaction. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.127] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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59
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Satoh T, Yasoshima T, Momochi H. A new approach to the synthesis of 1-oxaspiro[4.n]alkanes and tetrahydrofurans by the 1,5-CH insertion reaction of magnesium carbenoids. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.02.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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60
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Saitoh H, Watanabe T, Kimura T, Kato Y, Satoh T. New synthesis of multisubstituted cyanocyclopropanes by the intramolecular SN2 alkylation and 1,3-CC insertion reaction of magnesium carbenoids as the key reactions. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.01.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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61
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Synthesis, including asymmetric synthesis, of 3-oxabicyclo[3.1.0]hexanes and bicyclo[3.1.0]hexanes by the 1,5-CH insertion of cyclopropylmagnesium carbenoids as the key reaction. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.085] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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62
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63
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Biggs-Houck JE, Davis RL, Wei J, Mercado BQ, Olmstead MM, Tantillo DJ, Shaw JT. Carbon–Carbon Bond-Forming Reactions of α-Thioaryl Carbonyl Compounds for the Synthesis of Complex Heterocyclic Molecules. J Org Chem 2011; 77:160-72. [DOI: 10.1021/jo201541e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- James E. Biggs-Houck
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - Rebecca L. Davis
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - Jingqiang Wei
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - Brandon Q. Mercado
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - Marilyn M. Olmstead
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - Dean J. Tantillo
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
| | - Jared T. Shaw
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616,
United States
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64
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Ishigaki M, Inumaru M, Satoh T. New synthesis of allylidenecyclobutanes by the reaction of cyclobutylmagnesium carbenoids with vinyl sulfones. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.08.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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65
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Satoh T, Kashiwamura G, Nagamoto S, Sasaki Y, Sugiyama S. Insertion of cyclopropanes between a carbonyl carbon and an α-carbon of carbonyl compounds with cyclopropylmagnesium carbenoids. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.06.069] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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66
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Momochi H, Noguchi T, Miyagawa T, Ogawa N, Tadokoro M, Satoh T. The first example for the asymmetric synthesis of allenes by the Doering–LaFlamme allene synthesis with enantiopure cyclopropylmagnesium carbenoids. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.03.150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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67
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Melzig L, Rauhut CB, Naredi‐Rainer N, Knochel P. Difunctionalisation of Arenes and Heteroarenes by Directed Metallation and Sulfoxide–Magnesium Exchange. Chemistry 2011; 17:5362-72. [DOI: 10.1002/chem.201003657] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Laurin Melzig
- Department Chemie, Ludwig‐Maximilians‐Universität München, Butenandtstr 5‐13, Haus F, 81377 München (Germany), Fax: (+49) 89‐2180‐77680
| | - Christian B. Rauhut
- Department Chemie, Ludwig‐Maximilians‐Universität München, Butenandtstr 5‐13, Haus F, 81377 München (Germany), Fax: (+49) 89‐2180‐77680
| | - Nikolaus Naredi‐Rainer
- Department Chemie, Ludwig‐Maximilians‐Universität München, Butenandtstr 5‐13, Haus F, 81377 München (Germany), Fax: (+49) 89‐2180‐77680
| | - Paul Knochel
- Department Chemie, Ludwig‐Maximilians‐Universität München, Butenandtstr 5‐13, Haus F, 81377 München (Germany), Fax: (+49) 89‐2180‐77680
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68
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Ishida N, Saitoh H, Sugiyama S, Satoh T. Synthesis of conjugated enynes from ketones and aldehydes by 1,2-CC insertion and 1,2-CH insertion of carbenoids as the key reactions. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.02.079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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69
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Jochmann P, Maslek S, Spaniol TP, Okuda J. Allyl Calcium Compounds: Synthesis and Structure of Bis(η3-1-alkenyl)calcium. Organometallics 2011. [DOI: 10.1021/om200012k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Phillip Jochmann
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Stefanie Maslek
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
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70
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Satoh T, Awata Y, Kato Y, Ogata S, Ishigaki M, Sugiyama S, Saitoh H. Synthesis, including asymmetric synthesis, of 1-substituted cyclopentenes from cyclobutanones with one-carbon ring-expansion by 1,2-carbon-carbon insertion of magnesium carbenoids. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.12.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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71
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Zheng JC, Yun SY, Sun C, Lee NK, Lee D. Selectivity Control in Alkylidene Carbene-Mediated C−H Insertion and Allene Formation. J Org Chem 2011; 76:1086-99. [PMID: 21244086 DOI: 10.1021/jo102180f] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Jun-Cheng Zheng
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Sang Young Yun
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Chunrui Sun
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Nam-Kyu Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Daesung Lee
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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72
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Azizoglu A, Yildiz CB. Ring-Opening Mechanism of Lithium Bromosilacyclopropylidenoids to Silaallenes. Organometallics 2010. [DOI: 10.1021/om100868b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akin Azizoglu
- Department of Chemistry, University of Balikesir, TR-10145, Balikesir, Turkey
| | - Cem B. Yildiz
- Department of Chemistry, Aksaray University, TR-68100, Aksaray, Turkey
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73
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Zheng K, Yang Y, Zhao J, Yin C, Lin L, Liu X, Feng X. The Magnesium(II)-Catalyzed Asymmetric Ketone-Ene Reaction under Solvent-Free Conditions: Stereocontrolled Access to Enantioenriched Trifluoromethyl-Substituted Compounds. Chemistry 2010; 16:9969-72. [DOI: 10.1002/chem.201001412] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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74
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Alkylative Carbocyclization of ω-Iodoalkynyl Tosylates with Alkynyllithium Compounds Through a Carbenoid-Chain Process Leading to (1-Iodoprop-2-ynylidene)tetrahydrofurans and -cyclopropanes. Chemistry 2010; 16:9164-74. [DOI: 10.1002/chem.201001105] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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75
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Watanabe H, Ogata S, Satoh T. A method for the synthesis of cyclopropanes by regiospecific and regioselective magnesium carbenoid 1,3-CH insertion as the key reactions. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.05.061] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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76
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Satoh T, Ikeda S, Miyagawa T, Noguchi T. A short synthesis of 3-oxa- and 3-azabicyclo[3.1.0]hexanes from α,β-unsaturated esters based on the 1,5-CH insertion reaction of cyclopropylmagnesium carbenoids. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.02.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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77
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Asymmetric synthesis of bicyclo[n.1.0]alkanes by the enantioselective 1,3-CH insertion reaction of chiral magnesium carbenoids. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2009.12.027] [Citation(s) in RCA: 13] [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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78
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Satoh T. [Exploitation of the chemistry of magnesium carbenoids and their use in organic synthesis]. YAKUGAKU ZASSHI 2009; 129:1013-23. [PMID: 19721376 DOI: 10.1248/yakushi.129.1013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Synthetic organic chemistry is a base of medicinal chemistry and the exploitation of new methods for carbon-carbon bond formation is of most importance in synthetic organic chemistry. Carbenes and carbenoids have long been known to be highly reactive carbon species that show a variety of unique reactivity. However, those reactive species are not fully used in organic synthesis. The reasons are as follows: one is the precursors for the generation of carbenes and carbenoids are quite limited and the other is that the reactivity of the species is too high to control. In order to solve the problem mentioned above, we used alpha-haloalkyl (or alkenyl) aryl sulfoxides as the precursors and used sulfoxide-magnesium exchange reaction for generation of much mild magnesium carbenoids. alpha-Haloalkyl (or alkenyl) aryl sulfoxides are quite easily synthesized in high overall yields. Magnesium carbenoids, cyclopropylmagnesium carbenoids, cyclobutylmagnesium carbenoids, magnesium beta-oxido carbenoids, and magnesium alkylidene carbenoids are generated at low temperature from the corresponding sulfoxides with a Grignard reagent in quantitative yields. They were found to be stable usually at below -60 degrees C for at least 30 min. The each magnesium carbenoids have their own unique reactivities and we could find many unprecedented reactions from these reactive species. Recent results for the developments of new synthetic methods based on the chemistry of magnesium carbenoids are described.
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Affiliation(s)
- Tsuyoshi Satoh
- Graduate School of Chemical Sciences and Technology, Tokyo University of Science, Tokyo, Japan.
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79
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A new synthesis, including asymmetric synthesis, of alkylidenecyclopropanes by 1,2-CC insertion of cyclobutylmagnesium carbenoides as the key reaction. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.04.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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80
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Crimmin MR, Arrowsmith M, Barrett AGM, Casely IJ, Hill MS, Procopiou PA. Intramolecular Hydroamination of Aminoalkenes by Calcium and Magnesium Complexes: A Synthetic and Mechanistic Study. J Am Chem Soc 2009; 131:9670-85. [DOI: 10.1021/ja9003377] [Citation(s) in RCA: 237] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mark R. Crimmin
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K., Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Merle Arrowsmith
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K., Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Anthony G. M. Barrett
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K., Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Ian J. Casely
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K., Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K., Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Panayiotis A. Procopiou
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K., Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London SW7 2AZ, U.K., and GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
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81
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Alkenylation of thiophenes and furans at the 2-position and a synthesis of allenes conjugated with α,β-unsaturated ester with magnesium alkylidene carbenoids. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.02.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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82
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Yamashita H, Satoh T. A synthesis of di- and tri-substituted β,γ-unsaturated esters from aldehydes by the magnesium carbenoid 1,2-CH and 1,2-CC insertion as the key reaction. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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83
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Satoh T, Nagamoto S, Yajima M, Yamada Y, Ohata Y, Tadokoro M. A novel synthesis of spiro[2.6]nonadienones by the reaction of magnesium cyclopropylidenes with naphtholates and phenolates. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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84
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Meta- and para-difunctionalization of arenes via a sulfoxide-magnesium exchange reaction. Org Lett 2008; 10:3891-4. [PMID: 18680381 DOI: 10.1021/ol801431z] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The aryl sulfoxide moiety (ArSO) allows an expedient two-step meta-, para-difunctionalization of readily available diaryl sulfoxides. In the first step, the sulfoxide plays the role of a directing metalation group. In the second step, triggered by i-PrMgCl x LiCl, it becomes a leaving group and undergoes a regioselective sulfoxide-magnesium exchange.
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85
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Tanaka S, Anai T, Tadokoro M, Satoh T. One-carbon homologation of unsymmetrical ketones through magnesium β-oxido carbenoid rearrangement and trapping the enolate intermediates with electrophiles. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.05.079] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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