1
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Rearrangements of polyaza(oxa-,thia-)heterocyclic carbanions in organic synthesis. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3133-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Hodgson DM, Almohseni HAA. Evolution of a Cycloaddition–Rearrangement Approach to the Squalestatins: A Quarter-Century Odyssey. Synlett 2020. [DOI: 10.1055/s-0040-1707127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The highs, lows, and diversions of a journey leading to two syntheses of 6,7-dideoxysqualestatin H5 is described. Both syntheses relied on highly diastereoselective n-alkylations of a tartrate acetonide enolate and subsequent oxidation–hydrolysis to provide an asymmetric entry to β-hydroxy-α-ketoester motifs. The latter were differentially elaborated to diazoketones which underwent stereo- and regioselective Rh(II)-catalysed cyclic carbonyl ylide formation–cycloaddition and then acid-catalysed transketalisation to generate the 2,8-dioxabicyclo[3.2.1]octane core of the squalestatins/zaragozic acids at the correct tricarboxylate oxidation level. The unsaturated side chain was either protected with a bromide substituent during the transketalisation or introduced afterwards by a stereoretentive Ni-catalyzed Csp3–Csp2 cross-electrophile coupling.1 Introduction 2 Racemic Model Studies to the Squalestatin/Zaragozic Acid Core3 Asymmetric Model Studies to a Keto α-Diazoester3.1 Dialkyl Squarate Desymmetrisation3.2 Tartrate Alkylation3.2.1 Further Studies on Seebach’s Alkylation Chemistry 4 Failure at the Penultimate Step to DDSQ 5 Second-Generation Approach to DDSQ: A Bromide Substituent Strategy 5.1 Stereoselective Routes to E-Alkenyl Halides via β-Oxido Phosphonium Ylides 5.2 Back to DDSQ Synthesis6 An Alternative Strategy to DDSQ: By Cross-Electrophile Coupling7 Alkene Ozonolysis in the Presence of Diazo Functionality: Accessing α-Ketoester Intermediates8 Summary
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3
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Gava R, Fernández E. Organoboron synthesis via ring opening coupling reactions. Org Biomol Chem 2019; 17:6317-6325. [PMID: 31180097 DOI: 10.1039/c9ob00989b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One of the most atom economical synthesis reactions of organoboron compounds can be achieved by addition reactions of boron reagents to unsaturated substrates. However, when the addition reaction takes place via carbanions promoting ring opening coupling reactions, the selective cleavage of the inherent bonds and the generation of new C-C bonds warrant the selective synthesis of organoboron systems with total efficiency. Here we describe new trends towards the selective synthesis of organoboron compounds where boron reagents and cyclic substrates participate in the generation of carbanions, in the presence of stoichiometric amounts of main-group metals or catalytic amounts of transition metal complexes, via ring opening coupling transformations. The generality and limitations of these new protocols are discussed.
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Affiliation(s)
- Riccardo Gava
- Department of Química Física i Inorgànica, University Rovira i Virgili, Tarragona, Spain.
| | - Elena Fernández
- Department of Química Física i Inorgànica, University Rovira i Virgili, Tarragona, Spain.
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4
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Kiyokawa K, Kosaka T, Minakata S. Metal-Free Aziridination of Styrene Derivatives with Iminoiodinane Catalyzed by a Combination of Iodine and Ammonium Iodide. Org Lett 2013; 15:4858-61. [DOI: 10.1021/ol402276f] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Kensuke Kiyokawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Tomoki Kosaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
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5
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Hodgson DM, Persaud RSD. Alkenes from β-lithiooxyphosphonium ylides generated by trapping α-lithiated terminal epoxides with triphenylphosphine. Beilstein J Org Chem 2012; 8:1896-900. [PMID: 23209528 PMCID: PMC3511028 DOI: 10.3762/bjoc.8.219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 10/15/2012] [Indexed: 11/23/2022] Open
Abstract
Terminal epoxides undergo lithium 2,2,6,6-tetramethylpiperidide-induced α-lithiation and subsequent interception with Ph3P to provide a new and direct entry to β-lithiooxyphosphonium ylides. The intermediacy of such an ylide is demonstrated by representative alkene-forming reactions with chloromethyl pivalate, benzaldehyde and CD3OD, giving a Z-allylic pivalate, a conjugated E-allylic alcohol and a partially deuterated terminal alkene, respectively, in modest yields.
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Affiliation(s)
- David M Hodgson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
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6
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M. Hodgson D, A. H. Stent M, S. Paton R, X. Wilson F. Unusual Base-Induced Rearrangement of exo-9-Oxabicyclo[4.2.1]non-7-ene Oxide to exo-8-Hydroxybicyclo[3.3.0]octan-2-one. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)35] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Yoshida JI, Kim H, Nagaki A. Green and sustainable chemical synthesis using flow microreactors. CHEMSUSCHEM 2011; 4:331-40. [PMID: 21394921 DOI: 10.1002/cssc.201000271] [Citation(s) in RCA: 277] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Indexed: 05/12/2023]
Abstract
Several features that allow flow microreactors contribute to green and sustainable chemical synthesis are presented: (1) For extremely fast reactions, kinetics often cannot be used because of the lack of homogeneity of the reaction environment when they are conducted in batch macroreactors. Better controllability, by virtue of fast mixing based on short diffusion paths in microreactors, however, leads to a higher selectivity of the products, based on kinetics considerations. Therefore, less waste is produced. (2) Reactions involving highly unstable intermediates usually require very low temperatures when they are conducted in macrobatch reactors. By virtue of short residence times, flow microreactors enable performing such reactions at ambient temperatures, avoiding cryogenic conditions and minimizing the energy required for cooling. (3) By virtue of the precise residence time control, flow microreactors allow to avoid the use of auxiliary substances such as protecting groups, enabling highly atom- and step-economical straightforward syntheses. The development of several test plants based on microreaction technology has proved that flow microreactor synthesis can be applied to the green and sustainable production of chemical substances on industrial scales. (4) Microreactor technology enables on-demand and on-site synthesis, which leads to less energy for transportation and easy recycling of substances.
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Affiliation(s)
- Jun-ichi Yoshida
- Department of Synthetic and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan.
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8
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Belen’kii L, Gramenitskaya V, Evdokimenkova Y. The Literature of Heterocyclic Chemistry, Part X, 2005–2007. ADVANCES IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/b978-0-12-385464-3.00001-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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9
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Nagaki A, Takizawa E, Yoshida JI. Generation and Reactions of Oxiranyllithiums by Use of a Flow Microreactor System. Chemistry 2010; 16:14149-58. [DOI: 10.1002/chem.201000815] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Morán-Ramallal R, Liz R, Gotor V. Enantiopure trans-3-Arylaziridine-2-carboxamides: Preparation by Bacterial Hydrolysis and Ring-Openings toward Enantiopure, Unnatural d-α-Amino Acids. J Org Chem 2010; 75:6614-24. [DOI: 10.1021/jo101377j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Roberto Morán-Ramallal
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Ramón Liz
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, E-33071 Oviedo, Spain
| | - Vicente Gotor
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Biotecnología de Asturias, Universidad de Oviedo, E-33071 Oviedo, Spain
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11
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Capriati V, Florio S. Anatomy of long-lasting love affairs with lithium carbenoids: past and present status and future prospects. Chemistry 2010; 16:4152-62. [PMID: 20222089 DOI: 10.1002/chem.200902870] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
After a long adolescence, the chemistry of lithium carbenoids has currently been entering its maturity bringing a dowry of a more in-depth and less empirical knowledge of the structure and configurational stability of such double-faced intermediates; this, thanks in particular to the synergistic and harmonic cooperation between calculations and the most modern NMR techniques now at our disposal. Such knowledge has stimulated the development of fruitful stereoselective applications in the field of organic synthesis, providing in addition a rationale to observed selectivities. Such aspects together with the role played by aggregation and solvation on the structure-reactivity relationship are highlighted throughout this Minireview with selected examples extracted from recent literature.
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Affiliation(s)
- Vito Capriati
- Dipartimento Farmaco-Chimico, Università di Bari Aldo Moro, Consorzio Interuniversitario Nazionale Metodologie e Processi Innovativi di Sintesi C.I.N.M.P.I.S. Via E. Orabona 4, 70125 Bari, Italy.
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12
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Hodgson DM, Salik S, Fox DJ. Stereocontrolled syntheses of (-)-cubebol and (-)-10-epicubebol involving intramolecular cyclopropanation of alpha-lithiated epoxides. J Org Chem 2010; 75:2157-68. [PMID: 20063852 DOI: 10.1021/jo9022974] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Formylation of (-)-menthone (11) with LDA and HCO(2)CH(2)CF(3) avoids loss of configurational integrity at the isopropyl group, giving hydroxymethylenementhone 12. Lithium 2,2,6,6-tetramethylpiperidide-induced intramolecular cyclopropanation of derived unsaturated terminal epoxide 17 (and chlorohydrin 16), efficiently generates a substituted tricyclo[4.4.0.0(1,5)]decan-4-ol 18, which is used in a concise synthesis of (-)-cubebol (1). In contrast, isopropyl group inversion during formylation of menthone with NaOMe and HCO(2)Et led, by a similar strategy, to syntheses of 7-epicubebol (33) and (from (+)-menthone) of naturally occurring (-)-10-epicubebol (39), confirming the original structural assignment. Computational studies support the origin of the inversion as being rate-determining formylation of cis-enolate 27 from a mixture of rapidly interconverting enolates. In the synthesis of 7-epicubebol (33), allylic tertiary C-H insertion is observed as a significant competing reaction in the intramolecular cyclopropanation of unsaturated terminal epoxide 22.
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Affiliation(s)
- David M Hodgson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, United Kingdom.
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13
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Florio S, Luisi R. Aziridinyl Anions: Generation, Reactivity, and Use in Modern Synthetic Chemistry. Chem Rev 2010; 110:5128-57. [DOI: 10.1021/cr100032b] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saverio Florio
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 Bari, Italy
| | - Renzo Luisi
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 Bari, Italy
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14
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Nagaki A, Takizawa E, Yoshida JI. Generations and Reactions ofN-(t-Butylsulfonyl)aziridinyllithiums Using Microreactors. CHEM LETT 2009. [DOI: 10.1246/cl.2009.1060] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Capriati V, Florio S, Perna F, Salomone A, Abbotto A, Amedjkouh M, Nilsson Lill S. On the Dichotomic Reactivity of Lithiated Styrene Oxide: A Computational and Multinuclear Magnetic Resonance Investigation. Chemistry 2009; 15:7958-7979. [DOI: 10.1002/chem.200900834] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Nagaki A, Takizawa E, Yoshida JI. Generation and Reactions of α-Silyloxiranyllithium in a Microreactor. CHEM LETT 2009. [DOI: 10.1246/cl.2009.486] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Schmidt F, Keller F, Vedrenne E, Aggarwal VK. Stereocontrolled synthesis of beta-amino alcohols from lithiated aziridines and boronic esters. Angew Chem Int Ed Engl 2009; 48:1149-52. [PMID: 19115354 DOI: 10.1002/anie.200805272] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Frank Schmidt
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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18
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Musio B, Clarkson GJ, Shipman M, Florio S, Luisi R. Synthesis of optically active arylaziridines by regio- and stereospecific lithiation of N-bus-phenylaziridine. Org Lett 2009; 11:325-8. [PMID: 19086905 DOI: 10.1021/ol802487v] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Alpha,alpha-disubstituted aziridines can be produced in good yields by selective lithiation of N-tert-butylsulfonyl-2-phenylaziridine (n-BuLi/TMEDA, Et(2)O) at the benzylic position and subsequent trapping with a range of electrophiles. Repetition of the lithiation/electrophilic trapping sequence provides a stereocontrolled route to trisubstituted aziridines. Using (R)-N-tert-butylsulfonyl-2-phenylaziridine, the alpha,alpha-disubstituted aziridines can be produced as single enantiomers (er >98:2), indicating that the intermediate organolithium is configurationally stable. Efficient aziridine ring-opening reactions leading to 1,2-diamines and 1,4-diamines are also reported.
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Affiliation(s)
- Biagia Musio
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
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19
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Schmidt F, Keller F, Vedrenne E, Aggarwal V. Stereocontrolled Synthesis of β-Amino Alcohols from Lithiated Aziridines and Boronic Esters. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805272] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Nagaki A, Takizawa E, Yoshida JI. Oxiranyl Anion Methodology Using Microflow Systems. J Am Chem Soc 2009; 131:1654-5. [DOI: 10.1021/ja809325a] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aiichiro Nagaki
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Eiji Takizawa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Jun-ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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21
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Huang J, Moore SP, O'Brien P, Whitwood AC, Gilday J. Lithiation-electrophilic trapping of N-sulfonyl-activated ethylene aziridines. Org Biomol Chem 2009; 7:335-45. [PMID: 19109679 DOI: 10.1039/b815957b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Jianhui Huang
- Department of Chemistry, University of York, Heslington, York, UK
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22
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Hodgson DM, Bray CD, Kindon ND, Reynolds NJ, Coote SJ, Um JM, Houk KN. Synthesis and C-Alkylation of Hindered Aldehyde Enamines. J Org Chem 2008; 74:1019-28. [DOI: 10.1021/jo802016t] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David M. Hodgson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Christopher D. Bray
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Nicholas D. Kindon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Nigel J. Reynolds
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Steven J. Coote
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Joann M. Um
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - K. N. Houk
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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Fantauzzi S, Gallo E, Caselli A, Piangiolino C, Ragaini F, Re N, Cenini S. Rearrangement of N-Aryl-2-Vinylaziridines to Benzoazepines and Dihydropyrroles: A Synthetic and Theoretical Study. Chemistry 2008; 15:1241-51. [DOI: 10.1002/chem.200801148] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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24
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Vedrenne E, Wallner OA, Vitale M, Schmidt F, Aggarwal VK. Homologation of Boronic Esters with Lithiated Epoxides for the Stereocontrolled Synthesis of 1,2- and 1,3-Diols and 1,2,4-Triols. Org Lett 2008; 11:165-8. [DOI: 10.1021/ol802651b] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Olov A. Wallner
- School of Chemistry, University of Bristol, Bristol BS81TS, U.K
| | - Maxime Vitale
- School of Chemistry, University of Bristol, Bristol BS81TS, U.K
| | - Frank Schmidt
- School of Chemistry, University of Bristol, Bristol BS81TS, U.K
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Affortunato F, Florio S, Luisi R, Musio B. α- vs Ortho-Lithiation of N-Alkylarylaziridines: Probing the Role of the Nitrogen Inversion Process. J Org Chem 2008; 73:9214-20. [DOI: 10.1021/jo8016549] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francesco Affortunato
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario Nazionale Metodologie e Processi Innovativi di Sintesi C.I.N.M.P.I.S., Via E. Orabona 4, I-70125, Bari, Italy
| | - Saverio Florio
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario Nazionale Metodologie e Processi Innovativi di Sintesi C.I.N.M.P.I.S., Via E. Orabona 4, I-70125, Bari, Italy
| | - Renzo Luisi
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario Nazionale Metodologie e Processi Innovativi di Sintesi C.I.N.M.P.I.S., Via E. Orabona 4, I-70125, Bari, Italy
| | - Biagia Musio
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario Nazionale Metodologie e Processi Innovativi di Sintesi C.I.N.M.P.I.S., Via E. Orabona 4, I-70125, Bari, Italy
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Coote SC, Moore SP, O'Brien P, Whitwood AC, Gilday J. Organolithium-mediated conversion of beta-alkoxy aziridines into allylic sulfonamides: effect of the N-sulfonyl group and a formal synthesis of (+/-)-perhydrohistrionicotoxin. J Org Chem 2008; 73:7852-5. [PMID: 18778103 DOI: 10.1021/jo801586h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In 18 out of 20 examples of the organolithium-mediated conversion of beta-alkoxy aziridines into substituted allylic sulfonamides, use of a Bus (Bus = t-BuSO2) substituent on the nitrogen gave higher yields compared to the analogous N-Ts compounds. The success with the N-Bus aziridines facilitated the development of a new route to the spirocyclic core of the histrionicotoxins and completion of a formal synthesis of (+/-)-perhydrohistrionicotoxin.
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Affiliation(s)
- Susannah C Coote
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
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27
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Capriati V, Florio S, Luisi R. α-Substituted α-Lithiated Oxiranes: Useful Reactive Intermediates. Chem Rev 2008; 108:1918-42. [DOI: 10.1021/cr0683921] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vito Capriati
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 - Bari, Italy
| | - Saverio Florio
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 - Bari, Italy
| | - Renzo Luisi
- Dipartimento Farmaco-Chimico, Università di Bari, Consorzio Interuniversitario C.I.N.M.P.I.S., Via E. Orabona 4, I-70125 - Bari, Italy
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28
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Shimizu M, Hiyama T, Fujimoto T, Liu X, Takeda Y. Stereoselective Preparation and Cope Rearrangement of 2-CF3-cis-2,3-bis(alkenyl)oxiranes: A Facile Route to 2-CF3-Substituted Oxacycles. HETEROCYCLES 2008. [DOI: 10.3987/com-08-s(n)13] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Affiliation(s)
- Joseph P Michael
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Wits, South Africa.
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30
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Fantauzzi S, Gallo E, Caselli A, Piangiolino C, Ragaini F, Cenini S. The (Porphyrin)ruthenium-Catalyzed Aziridination of Olefins Using Aryl Azides as Nitrogen Sources. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700678] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Hodgson DM, Humphreys PG, Xu Z, Ward JG. Lithiation-induced migrations from nitrogen to carbon in terminal aziridines. Angew Chem Int Ed Engl 2007; 46:2245-8. [PMID: 17300125 DOI: 10.1002/anie.200604920] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- David M Hodgson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK.
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Singh GS, D'hooghe M, De Kimpe N. Synthesis and Reactivity ofC-Heteroatom-Substituted Aziridines. Chem Rev 2007; 107:2080-135. [PMID: 17488062 DOI: 10.1021/cr0680033] [Citation(s) in RCA: 359] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Girija S Singh
- Chemistry Department, Faculty of Science, University of Botswana, Private Bag 0022, Gaborone, Botswana
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Olsen CA, Franzyk H, Jaroszewski JW. Aziridines in Parallel‐ and Solid‐Phase Synthesis. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600837] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Christian A. Olsen
- Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, 2100 Copenhagen, Denmark, Fax: +45‐3530‐6041
| | - Henrik Franzyk
- Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, 2100 Copenhagen, Denmark, Fax: +45‐3530‐6041
| | - Jerzy W. Jaroszewski
- Department of Medicinal Chemistry, The Danish University of Pharmaceutical Sciences, Universitetsparken 2, 2100 Copenhagen, Denmark, Fax: +45‐3530‐6041
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Hodgson D, Humphreys P, Xu Z, Ward J. Lithiation-Induced Migrations from Nitrogen to Carbon in Terminal Aziridines. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604920] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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