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Luo J, Lu D, Peng Y, Tang Q. Paal-Knorr Furan Synthesis Using TiCl4
as Dehydrating Agent: A Concise Furan Synthesis from α-Haloketones and β-Dicarbonyl Compounds. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700340] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Juan Luo
- College of Pharmacy, Faculty of Laboratory Medicine; Chongqing Research Center for Pharmaceutical Engineering; Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology; Chongqing Medical University; No.1 Yixueyuan Road Chongqing 400016 P. R. China
| | - Dan Lu
- College of Pharmacy, Faculty of Laboratory Medicine; Chongqing Research Center for Pharmaceutical Engineering; Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology; Chongqing Medical University; No.1 Yixueyuan Road Chongqing 400016 P. R. China
| | - Yi Peng
- College of Pharmacy, Faculty of Laboratory Medicine; Chongqing Research Center for Pharmaceutical Engineering; Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology; Chongqing Medical University; No.1 Yixueyuan Road Chongqing 400016 P. R. China
| | - Qiang Tang
- College of Pharmacy, Faculty of Laboratory Medicine; Chongqing Research Center for Pharmaceutical Engineering; Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology; Chongqing Medical University; No.1 Yixueyuan Road Chongqing 400016 P. R. China
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Uenishi A, Nakagawa Y, Osumi H, Harada T. Practical Enantioselective Arylation and Heteroarylation of Aldehydes with In Situ Prepared Organotitanium Reagents Catalyzed by 3-Aryl-H8-BINOL-Derived Titanium Complexes. Chemistry 2013; 19:4896-905. [DOI: 10.1002/chem.201203946] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Indexed: 11/06/2022]
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Fleury LM, Kosal AD, Masters JT, Ashfeld BL. Cooperative titanocene and phosphine catalysis: accelerated C-X activation for the generation of reactive organometallics. J Org Chem 2012; 78:253-69. [PMID: 23094703 DOI: 10.1021/jo301726v] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The study presented herein describes a reductive transmetalation approach toward the generation of Grignard and organozinc reagents mediated by a titanocene catalyst. This method enables the metalation of functionalized substrates without loss of functional group compatibility. Allyl zinc reagents and allyl, vinyl, and alkyl Grignard reagents were generated in situ and used in the addition to carbonyl substrates to provide the corresponding carbinols in yields up to 99%. It was discovered that phosphine ligands effectively accelerate the reductive transmetalation event to enable the metalation of C-X bonds at temperatures as low as -40 °C. Performing the reactions in the presence of chiral diamines and amino alcohols led to the enantioselective allylation of aldehydes.
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Affiliation(s)
- Lauren M Fleury
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
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4
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Seebach D. Erzeugung sekundärer, tertiärer und quartärer Zentren durch geminale Disubstitution von Carbonyl‐Sauerstoffatomen. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201003823] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dieter Seebach
- Laboratorium für Organische Chemie, Departement für Chemie und Angewandte Biowissenschaften, ETH‐Zürich, Hönggerberg HCI H331, Wolfgang‐Pauli‐Strasse 10, 8093 Zürich (Schweiz), Fax: (+41) 44‐632‐1144 http://infosee.ethz.ch/seebach/seebach.html
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Seebach D. Generation of Secondary, Tertiary, and Quaternary Centers by Geminal Disubstitution of Carbonyl Oxygens. Angew Chem Int Ed Engl 2010; 50:96-101. [DOI: 10.1002/anie.201003823] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dieter Seebach
- Laboratorium für Organische Chemie, Departement für Chemie und Angewandte Biowissenschaften, ETH‐Zürich, Hönggerberg HCI H331, Wolfgang‐Pauli‐Strasse 10, 8093 Zürich (Schweiz), Fax: (+41) 44‐632‐1144 http://infosee.ethz.ch/seebach/seebach.html
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Heimbach P, Bartik T, Boese R, Schenkluhn H, Szczendzina G, Zeppenfeld E. Ordungsfaktoren in der organischen Synthese Mustererkennung als Methode der Faktorenanalyse. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19880280402] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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7
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Taube R, Steinborn D, Drevs H, Chuong PN, Stransky N, Langlotz J. Redoxstabilität in der σ-Organoübergangsmetallchemie. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19880281102] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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Hémery T, Becker J, Fröhlich R, Hoppe D. (-)-Myrtenyl N,N-Diisopropylcarbamate: Stereochemistry of Lithiation and Electrophilic Substitution Directed by Dynamic Kinetic Diastereoisomer Resolution. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000390] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Schinzer D. Selektive Transformationen mit pentakoordinierten Siliciumverbindungen. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/nadc.19890370110] [Citation(s) in RCA: 8] [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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11
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Marrone A, Renzetti A, De Maria P, Gérard S, Sapi J, Fontana A, Re N. Condensation of beta-diester titanium enolates with carbonyl substrates: a combined DFT and experimental investigation. Chemistry 2010; 15:11537-50. [PMID: 19777518 DOI: 10.1002/chem.200901595] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The condensation of dialkyl beta-diesters with various aldehydes promoted by TiCl4 has been studied by DFT approaches and experimental methods, including NMR, IR and UV/Vis spectroscopy. Various possible reaction pathways have been investigated and their energy profiles evaluated to find out a plausible mechanism of the reaction. Theoretical results and experimental evidence point to a three-step mechanism: 1) Ti-induced formation of the enolate ion; 2) aldol reaction between the enolate ion and the aldehyde, both coordinated to titanium; and 3) intramolecular elimination that leads to a titanyl complex. The presented mechanistic hypothesis allows one to better understand the pivotal role of titanium(IV) in the reaction.
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Affiliation(s)
- Alessandro Marrone
- Dipartimento di Scienze del Farmaco, Università degli Studi G. d'Annunzio di Chieti-Pescara, Via dei Vestini, 66100 Chieti, Italy
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Wunderlich S, Kienle M, Knochel P. Gesteuerte Manganierung funktionalisierter Arene und Heterocyclen mithilfe von tmp2Mn⋅2 MgCl2⋅4 LiCl. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903505] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Wunderlich S, Kienle M, Knochel P. Directed Manganation of Functionalized Arenes and Heterocycles Using tmp2Mn⋅2 MgCl2⋅4 LiCl. Angew Chem Int Ed Engl 2009; 48:7256-60. [DOI: 10.1002/anie.200903505] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Preparation and characterization of macrocyclic dinickel complexes coligated by monoalkyl- and dialkylcarbamates. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.03.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Becker J, Bergander K, Fröhlich R, Hoppe D. Asymmetric Total Synthesis and X-Ray Crystal Structure of the Cytotoxic Marine Diterpene (+)-Vigulariol. Angew Chem Int Ed Engl 2008; 47:1654-7. [DOI: 10.1002/anie.200704678] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Becker J, Bergander K, Fröhlich R, Hoppe D. Asymmetrische Totalsynthese und Festkörperstruktur des marinen cytotoxischen Diterpens (+)-Vigulariol. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704678] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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17
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Hoppe D, Riemenschneider C. Regio‐ und diastereoselektive Synthese von (4‐Hydroxy‐3‐methyl‐1,2‐alkadienyl)carbamaten aus α‐titanierten 2‐Butinylcarbamaten und Aldehyden. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.19830950130] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dieter Hoppe
- Institut für Organische Chemie der Universität Tammannstraße 2, D‐3400 Göttingen
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Bou Chedid R, Fröhlich R, Wibbeling B, Hoppe D. Enantioselective γ-Deprotonation of Alkyl-SubstitutedO-1,3-Butadien-2-yl Carbamates and Regioselective Asymmetric Homoaldol Reaction. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Becker J, Fröhlich R, Kataeva O, Hoppe D. Stereoselective Synthesis of Hexahydroisobenzofuran-4(1H)-ones from Chiral Substituted Cyclohex-2-enyl Carbamates via Asymmetric Homoaldol Reaction and THF Cyclocondensation. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700220] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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Bou Chedid R, Brümmer M, Wibbeling B, Fröhlich R, Hoppe D. Stereo- und regiochemische Divergenz bei der Substitution eines lithiierten Alk-1-en-3-in-2-ylcarbamats – Synthese hoch enantiomerenangereicherter Vinylallene oder Alk-3-en-5-in-1-ole. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604978] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Bou Chedid R, Brümmer M, Wibbeling B, Fröhlich R, Hoppe D. Stereo- and Regiochemical Divergence in the Substitution of a Lithiated Alk-1-en-3-yn-2-yl Carbamate: Synthesis of Highly Enantioenriched Vinylallenes or Alk-3-en-5-yn-1-ols. Angew Chem Int Ed Engl 2007; 46:3131-4. [PMID: 17373010 DOI: 10.1002/anie.200604978] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Roland Bou Chedid
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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22
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Alexeev Y, Vasilchenko I, Kharisov B, Blanco L, Garnovskii A, Zhdanov Y. Review: synthetically modified carbohydrates as ligands. J COORD CHEM 2006. [DOI: 10.1080/00958970412331297523] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Yu.E. Alexeev
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
| | - I.S. Vasilchenko
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
| | - B.I. Kharisov
- c Faculdad de Ciencias Quimicas , Universidad Autonoma de Nuevo Leon , Monterrey, Mexico
| | - L.M. Blanco
- c Faculdad de Ciencias Quimicas , Universidad Autonoma de Nuevo Leon , Monterrey, Mexico
| | - A.D. Garnovskii
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
| | - Yu.A. Zhdanov
- a Institute of Physical and Organic Chemistry , Rostov State University , Rostov-on-Don, 344090, Russia
- b South Scientific Center of Russian Academy of Sciences , 344006 Rostov-on-Don, Chekhova st. 4.1, Russia
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24
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Reetz MT, Keßeler K, Schmidtberger S, Wenderoth B, Steinbach R. Chelat- oder Nicht-Chelat-Kontrolle bei stereoselektiven Reaktionen von Titan-Reagentien mit chiralen Alkoxycarbonyl-Verbindungen. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.19830951213] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
A stereoselective synthesis of (+)-norrisolide is presented. This natural product belongs to a family of marine spongiane diterpenes the structure of which is characterized by a fused gamma-lactone-gamma-lactol ring system attached to a bicyclic hydrophobic core. Our studies led to the development of a expedient synthesis of such gamma-lactone-gamma-lactol motifs based on ring expansion of a fused cyclopropyl ester. Highlights of the synthetic strategy toward norrisolide include the coupling of the two bicyclic systems by constructing a sterically demanding C9-C10 bond and the installation of the C19 oxygen at the last step of the synthesis via a Baeyer-Villiger oxidation.
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Affiliation(s)
- Thomas P Brady
- Department of Chemistry and Biochemistry, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0358, USA
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Enantio- and Diastereoselective Synthesis of Highly Substituted Acylcyclopropanes from Homoaldol Products by Stereospecific Homoallylic Cyclization. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500283] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Reuber J, Fröhlich R, Hoppe D. Asymmetric γ-Deprotonation and Substitution Reactions of (Z)-1,3-Diphenyl-1-propenylN,N-Diisopropylcarbamate. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Seebach D, Betschart C, Schiess M. Diastereoselektive synthese neuartigerMannich-Basen mittels titanderivaten, vorläufige mitteilung. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19840670626] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Seebach D, Beck AK, Imwinkelzied R, Roggo S, Wonnacott A. Chirale Alkoxytitan(IV)-Komplexe für enantioselektive nucleophile Additionen an Aldehyde und alsLewis-Säuren inDiels-Alder-Reaktionen. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19870700406] [Citation(s) in RCA: 251] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Seebach D, Kimmerlin T, Šebesta R, Campo MA, Beck AK. How we drifted into peptide chemistry and where we have arrived at. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.06.043] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Hoppe D, Krämer T. α-Deprotonation of an α-Chiral 2-Alkenylcarbamate with Retention and Lithium-Titanium Exchange with Inversion- the Homoaldol Reaction with 1,3-Chirality Transfer. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/anie.198601601] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Davies RP, Linton DJ, Schooler P, Snaith R, Wheatley AE. Oxygen capture by lithiated organozinc reagents containing aromatic 2-pyridylamide ligands. Chemistry 2001; 7:3696-704. [PMID: 11575770 DOI: 10.1002/1521-3765(20010903)7:17<3696::aid-chem3696>3.0.co;2-o] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The sequential reaction of ZnMe2 with a 2-pyridylamine (HN(2-C5H4N)R, R = Ph: 1; 3,5-Xy (=3,5-xylyl): 2; 2,6-Xy: 3; Bz (=benzyl): 4; Me: 5), tBuLi and thereafter with oxygen affords various lithium zincate species, the solid-state structures of which reveal a diversity of oxo-capture modes. Amine 1 reacts to give both dimeric THF [Li(Me)OZn[N(2-C5H4N)Ph]2] (6), wherein oxygen has inserted into the Zn-C bond of a [MeZn[N(2-C5H4N)-Ph]2] ion, and the trigonal Li2Zn complex, bis(OtBu)-capped (THF x Li)2-[[(mu3-O)tBu]2Zn[N(2-C5H4N)Ph]2] (7). The structural analogue of 6 (8) results from the employment of 2, while the use of more sterically congested 3 yields a pseudo-cubane dimer [(THF x [Li(tBu)OZn(OtBu)Me]]2] (9) notable for the retention of labile Zn-C(Me). Amines 4 and 5 afford the oxo-encapsulation products [mu4-O)Zn4[(2-C5H4N)-NBz]6] (10b), and [tBu(mu3-O)-Li3(mu6-O)Zn3[(2-C5H4N)NMe]6] (11), respectively, with concomitant oxo-insertion into a Li-C interaction resulting in capping of the fac-isomeric (mu6-O)M3M'3 distorted octahedral core of the latter complex by a tert-butoxide group.
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Affiliation(s)
- R P Davies
- Department of Chemistry, Imperial College of Science Technology and Medicine, London, UK
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Study of Stereoselectivity in Organometallic Additions to 1,2-O-Isopropylidene-O-R-α-D-xylopentodialdo-1,4-furanose. Molecules 2000. [DOI: 10.3390/51201386] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Abstract
While nonracemic catalysts can generate nonracemic products with or without the nonlinear relationship in enantiomeric excesses between catalysts and products, racemic catalysts inherently give only a racemic mixture of chiral products. Asymmetric catalysts, either in nonracemic or racemic form, can be further evolved into highly activated catalysts with association of chiral activators. This asymmetric activation process is particularly useful in racemic catalysis through selective activation of one enantiomer of the racemic catalyst. Recently, a strategy whereby a racemic catalyst is selectively deactivated by a chiral additive has been reported to yield nonracemic products. However, reported herein is an alternative and conceptually opposite strategy in which a chiral activator selectively activates, rather than deactivates, one enantiomer of a racemic chiral catalyst. The advantage of this activation strategy over the deactivation counterpart is that the activated catalyst can produce a greater enantiomeric excess in the products-even with the use of a catalytic amount of activator relative to chiral catalyst-than that attained by the enantiomerically pure catalyst on its own. Therefore, asymmetric activation could provide a general and powerful strategy for not only the use of atropisomeric, racemic ligands but also chirally flexible and proatropisomeric ligands without enantiomeric resolution!
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Affiliation(s)
- K Mikami
- Department of Chemical Technology Tokyo Institute of Technology Meguro-ku, Tokyo 152-8552 (Japan)
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Reetz MT. Synthesis and diastereoselective reactions of n,n-dibenzylamino aldehydes and related compounds. Chem Rev 1999; 99:1121-62. [PMID: 11749442 DOI: 10.1021/cr980417b] [Citation(s) in RCA: 263] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M T Reetz
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim/Ruhr, Germany
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1,5-Asymmetric induction in addition reaction of aldehydes with chiral allyltitaniums having an amino group at the stereogenic center. Synthesis of optically active 2,6-cis-disubstituted piperidines. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)01455-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hoppe D, Hense T. Enantioselektive Synthese mit Lithium/(−)-Spartein-Carbanion-Paaren. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971092105] [Citation(s) in RCA: 200] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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45
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Ligand effects in selective addition reactions of organoindium reagents with carbonyl compounds. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(97)00021-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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46
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Schmittel M, Söllner R, Werner H, Gevert O. Sterically Shielded Titanocene Enolates – Synthesis, Structure and Their Exceptional Stability towards Hydrolysis. Eur J Inorg Chem 1997. [DOI: 10.1002/cber.19971300209] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kasatkin A, Sato F. Ungewöhnliche Regioselektivitäten bei der Reaktion von Carbonyl- mit Allyl- oder Allenyl/Propargyltitanverbindungen: ein effizienter Zugang zu Alkylidencyclopropanderivaten. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961082336] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Alberto Marco J, Carda M, González F, Rodríguez S, Murga J. Synthesis of Protected Enantiopure Erythrulose Derivatives. ACTA ACUST UNITED AC 1996. [DOI: 10.1002/jlac.199619961114] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hollenstein S, Hesse M. Struktur des Zwischenproduktes einer (i-PrO)2 TiMe2-Methylierung: NMR-Untersuchungen und Konformationsanalyse. Helv Chim Acta 1996. [DOI: 10.1002/hlca.19960790325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
50
|
Kauffmann T. Nichtstabilisierte Alkylkomplexe und Alkyl-cyano-at-Komplexe von Eisen(II) und Cobalt(II) als neue Reagentien in der organischen Synthese. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961080404] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|