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Sharma BM, Yadav M, Gonnade RG, Kumar P. Unified Approach to Fused and Spirocyclic Oxindoles through Lewis-Acid-Promoted Opening of Spiroepoxyoxindoles with Allylsilanes: Application to the Formal Synthesis of (±)-Physovenine. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700259] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Brijesh M. Sharma
- Division of Organic Chemistry; CSIR - National Chemical Laboratory; 411008 Pune India
- Academy of Scientific and Innovative Research (AcSIR); 110025 New Delhi India
| | - Mahesh Yadav
- Division of Organic Chemistry; CSIR - National Chemical Laboratory; 411008 Pune India
| | - Rajesh G. Gonnade
- Academy of Scientific and Innovative Research (AcSIR); 110025 New Delhi India
- Physical and Materials Chemistry Division; CSIR - National Chemical Laboratory; Dr Homi Bhabha Road 411008 Pune India
| | - Pradeep Kumar
- Division of Organic Chemistry; CSIR - National Chemical Laboratory; 411008 Pune India
- Academy of Scientific and Innovative Research (AcSIR); 110025 New Delhi India
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Hotoda K, Ohnuma A, Kusakabe K, Tanaka A, Sasaki I, Sugimura H. Stereoselective synthesis of the (−)-dysiherbaine furopyran core via BF3-promoted formal [3+2] annulation of aldehydo-aldoses with allylsilanes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.10.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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3
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Atienza CCH, Diao T, Weller KJ, Nye SA, Lewis KM, Delis JGP, Boyer JL, Roy AK, Chirik PJ. Bis(imino)pyridine cobalt-catalyzed dehydrogenative silylation of alkenes: scope, mechanism, and origins of selective allylsilane formation. J Am Chem Soc 2014; 136:12108-18. [PMID: 25068530 DOI: 10.1021/ja5060884] [Citation(s) in RCA: 171] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aryl-substituted bis(imino)pyridine cobalt methyl complex, ((Mes)PDI)CoCH3 ((Mes)PDI = 2,6-(2,4,6-Me3C6H2-N═CMe)2C5H3N), promotes the catalytic dehydrogenative silylation of linear α-olefins to selectively form the corresponding allylsilanes with commercially relevant tertiary silanes such as (Me3SiO)2MeSiH and (EtO)3SiH. Dehydrogenative silylation of internal olefins such as cis- and trans-4-octene also exclusively produces the allylsilane with the silicon located at the terminus of the hydrocarbon chain, resulting in a highly selective base-metal-catalyzed method for the remote functionalization of C-H bonds with retention of unsaturation. The cobalt-catalyzed reactions also enable inexpensive α-olefins to serve as functional equivalents of the more valuable α, ω-dienes and offer a unique method for the cross-linking of silicone fluids with well-defined carbon spacers. Stoichiometric experiments and deuterium labeling studies support activation of the cobalt alkyl precursor to form a putative cobalt silyl, which undergoes 2,1-insertion of the alkene followed by selective β-hydrogen elimination from the carbon distal from the large tertiary silyl group and accounts for the observed selectivity for allylsilane formation.
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Shupe BH, Allen EE, MacDonald JP, Wilson SO, Franz AK. Synthesis of Spirocarbamate Oxindoles via Intramolecular Trapping of a β-Silyl Carbocation by an N-Boc Group. Org Lett 2013; 15:3218-21. [DOI: 10.1021/ol4010867] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Benjamin H. Shupe
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Emily E. Allen
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Jacob P. MacDonald
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Sean O. Wilson
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Annaliese K. Franz
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
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Hanhan NV, Ball-Jones NR, Tran NT, Franz AK. Catalytic Asymmetric [3+2] Annulation of Allylsilanes with Isatins: Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2011; 51:989-92. [DOI: 10.1002/anie.201105739] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2011] [Indexed: 11/09/2022]
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6
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Hanhan NV, Ball-Jones NR, Tran NT, Franz AK. Catalytic Asymmetric [3+2] Annulation of Allylsilanes with Isatins: Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105739] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Schmidt AW, Olpp T, Baum E, Stiffel T, Knölker HJ. Organosilicon-mediated total synthesis of the triquinane sesquiterpenes (±)-β-isocomene and (±)-isocomene. Org Biomol Chem 2010; 8:4562-8. [DOI: 10.1039/c0ob00051e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Schmidt AW, Olpp T, Schmid S, Jäger A, Knölker HJ. Cycloaddition of allylsilanes. Part 20: Organosilicon-mediated total synthesis of (±)-cameroonanol. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.01.115] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Catak S, Celik H, Demir AS, Aviyente V. Origin of Diastereoselectivity in the Synthesis of Chiral Bicyclic Lactams: π-Facial Selective Attack of Singlet Oxygen Induced by Hindered Internal Rotation. J Phys Chem A 2007; 111:5855-63. [PMID: 17566992 DOI: 10.1021/jp071608y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Previously reported experimental results indicate that photooxygenation of homochiral N-(hydroxyalkyl)-2-methylpyrroles with singlet oxygen yields trans-rather than cis-bicyclic lactams as the major product. In this study, the origin of selectivity in this reaction has been investigated with computational methods. Relative stabilities of homochiral N-(hydroxyalkyl)-2-methylpyrrole conformers and their effect on pi-facial selectivity of 1O2 were extensively studied. Stepwise and concerted reaction mechanisms, starting from the endoperoxide intermediates, were proposed and modeled in vacuum using the UB3LYP method with the 6-31+G** basis set. Solvent calculations were carried out in CH2Cl2, by means of the integral equation formalism-polarizable continuum model (IEF-PCM) at the UB3LYP/6-31+G** level of theory. Free energies of activation leading to both diastereomers were analyzed in an effort to explain the stereoselectivity and product distribution. Steric interactions among the pyrrole substituents were shown to lead to a rotational barrier higher than 10 kcal/mol. Hence, hindered internal rotation is suggested to cause one pyrrole conformer to be substantially overpopulated. This in turn has a major effect on pi-facial selectivity of 1O2, thereby favoring one endoperoxide over the other and leading to the diastereoselective synthesis of trans-pyrrolooxazolones. The importance of hindered internal rotors, for an accurate calculation of the frequency factors of a chemical reaction, has already been mentioned in the literature many times; however, in this work hindered internal rotors also seem to dictate the diastereoselective outcome of the reaction.
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Affiliation(s)
- Saron Catak
- Department of Chemistry, Bogazici University, 34342 Bebek, Istanbul, Turkey
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Abstract
[reaction: see text] An efficient synthesis of the tricyclic A-B subunit 2 of angelmicin B is described. A formal three-component coupling of aldehydes 4 and 6 with gamma-silylallylborane 7 was employed to assemble the tetrahydrofuranyl core of 2, a strategy highlighted by the stereoselective [3 + 2] annulation of allylsilanes 5a/5b with aldehyde 4. The efficiency of the [3 + 2] annulation was greatly improved by using the allylic benzhydryldimethylsilane 5b compared to the allylic phenyldimethylsilane 5a.
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Affiliation(s)
- William T Lambert
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
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12
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Chabaud L, James P, Landais Y. Allylsilanes in Organic Synthesis − Recent Developments. European J Org Chem 2004. [DOI: 10.1002/ejoc.200300789] [Citation(s) in RCA: 204] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Laurent Chabaud
- University Bordeaux‐I, Laboratoire de Chimie Organique et Organométallique, 351, Cours de la Libération, 33405 Talence Cedex, France, Fax: (internat.) + 33‐5‐40006286
| | - Philippe James
- University Bordeaux‐I, Laboratoire de Chimie Organique et Organométallique, 351, Cours de la Libération, 33405 Talence Cedex, France, Fax: (internat.) + 33‐5‐40006286
| | - Yannick Landais
- University Bordeaux‐I, Laboratoire de Chimie Organique et Organométallique, 351, Cours de la Libération, 33405 Talence Cedex, France, Fax: (internat.) + 33‐5‐40006286
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Aydogan F, Demir AS. Synthesis and photooxygenation of homochiral 2-methylpyrrole derivatives of chiral amino alcohols: simple, selective access to chiral bicyclic lactams. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2003.11.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Miura K, Hondo T, Okajima S, Nakagawa T, Takahashi T, Hosomi A. 1,2-silyl-migrative cyclization of vinylsilanes bearing a hydroxy group: stereoselective synthesis of multisubstituted tetrahydropyrans and tetrahydrofurans(1). J Org Chem 2002; 67:6082-90. [PMID: 12182646 DOI: 10.1021/jo026006j] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acid-catalyzed intramolecular addition of a hydroxy group to alpha-alkylated vinylsilanes has been studied. Treatment of (Z)-5-alkyl-5-silyl-4-penten-1-ols 1 (R = alkyl) with 5 mol % TiCl(4) in CHCl(3) gave trans-2-alkyl-3-silyltetrahydropyrans 2 exclusively (trans/cis = >99/1 to 97/3). The cyclization efficiency and rate strongly depended on the geometry of the C-C double bond and the silyl group. The use of (E)-vinylsilanes resulted in lower yields with poor cis-selectivity. In the cyclization of (Z)-1 (R = Bu), the silyl group used, the reaction time, and the yield of 2 were as follows: SiMe(2)Ph, 9.5 h, 75%; SiMe(3), 7.5 h, 66%; SiMePh(2), 24 h, 58%; SiMe(2)-t-Bu, 0.75 h, 85%; SiMe(2)Bn, 1.5 h, 78%. This 1,2-silyl-migrative cyclization could be applied to stereoselective synthesis of trisubstituted tetrahydropyrans. The acid-catalyzed reaction of 1-, 2-, or 3-substituted (Z)-5-silyl-4-nonen-1-ols 8 gave r-2,t-3,c-6-, r-2,t-3,t-5-, or r-2,t-3,c-4-trisubstituted tetrahydropyrans with high diastereoselectivity, respectively. (Z)-4-Alkyl-4-silyl-3-buten-1-ols 5 as well as 1 underwent the 1,2-silyl-migrative cyclization to give 2-alkyl-3-silyltetrahydrofurans 6 with high trans-selectivity. This silicon-directed cyclization was also available for the stereoselective synthesis of tri- and tetrasubstituted tetrahydrofurans.
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Affiliation(s)
- Katsukiyo Miura
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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Pei T, Widenhoefer RA. Palladium-catalyzed asymmetric diene cyclization/hydrosilylation employing functionalized silanes and disiloxanes. J Org Chem 2001; 66:7639-45. [PMID: 11701015 DOI: 10.1021/jo015724n] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pentasubstituted disiloxanes and silanes of the form HSiMe(2)CH(x)Ph(3-x)(x = 1 or 2) reacted with dimethyl diallylmalonate (1) and other functionalized 1,6-dienes in the presence of a catalytic 1:1 mixture of (N-N)Pd(Me)Cl [N-N = (R)-(+)-4-isopropyl-2-(2-pyridinyl)-2-oxazoline] [(R)-2] and NaBAr(4) [Ar = 3,5-C(6)H(3)(CF(3))(2)] to form the corresponding silylated cyclopentanes in good yield with high diastereoselectivity. The enantioselectivity of cyclization/hydrosilylation of 1 with disiloxanes and functionalized silanes at -20 degrees C increased in the following order: HSiMe(2)OSiMe(3) (75% ee) < HSiMe(2)OSiMe(2)-t-Bu (80% ee) < HSi(i-Pr)(2)OSiMe(3) (86% ee) = HSiMe(2)Bn (86% ee) < HSiMe(2)OSi(i-Pr)(3) (89% ee) < HSiMe(2)OSiPh(2)-t-Bu (91% ee) < HSiMe(2)CHPh(2) (93% ee). Silylated cyclopentanes derived from HSiMe(2)OSiMe(3) were oxidized with excess KF and peracetic acid at room temperature for 48 h to form the corresponding hydroxymethylcyclopentanes in good yield (82-95%). Silylated cyclopentanes derived from HSiMe(2)OSiPh(2)t-Bu were oxidized with a mixture of tetrabutylammonium fluoride and either H(2)O(2) or peracetic acid to form the corresponding alcohols in 48-76% yield. Silylated carbocycles generated from benzhydryldimethylsilane were oxidized with a mixture of TBAF/KHCO(3)/H(2)O(2) in 71-98% yield. Asymmetric cyclization/hydrosilylation/oxidation employing benzhydryldimethylsilane tolerated allylic and terminal olefinic substitution and a range of functional groups.
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Affiliation(s)
- T Pei
- Duke University, P. M. Gross Chemical Laboratory, Durham, North Carolina 27708-0346, USA
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D'Oca MG, Moraes LA, Pilli RA, Eberlin MN. Intrinsic Gas-Phase Electrophilic Reactivity of Cyclic N-Alkyl- and N-Acyliminium Ions. J Org Chem 2001; 66:3854-64. [PMID: 11375007 DOI: 10.1021/jo005778h] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The intrinsic gas-phase reactivity of cyclic N-alkyl- and N-acyliminium ions toward addition of allyltrimethylsilane (ATMS) has been compared using MS(2) and MS(3) pentaquadrupole mass spectrometric experiments. An order of electrophilic reactivity has been derived and found to agree with orders of overall reactivity in solution. The prototype five-membered ring N-alkyliminium ion 1a and its N-CH(3) analogue 1b, as well as their six-membered ring analogues 1c and 1d, lack N-acyl activation and they are, accordingly, inert toward ATMS addition. The five- and six-membered ring N-acyliminium ions with N-COCH(3) exocycclic groups, 3a and 3b, respectively, are also not very reactive. The N-acyliminium ions 2a and 2c, with s-trans locked endocyclic N-carbonyl groups, are the most reactive followed closely by 3c and 3d with exocyclic (and unlocked) N-CO(2)CH(3) groups. The five-membered ring N-acyliminium ions are more reactive than their six-membered ring analogues, that is: 2a > 2c and 3c > 3d. In contrast with the high reactivity of 2a, its N-CH(3) analogue 2b is inert toward ATMS addition. For the first time, the transient intermediates of a Mannich-type condensation reaction were isolated-the beta-silyl cations formed by ATMS addition to N-acyliminium ions-and their intrinsic gas-phase behavior toward dissociation and reaction with a nucleophile investigated. When collisionally activated, the beta-silyl cations dissociate preferentially by Grob fragmentation, that is, by retro-addition. With pyridine, they react competitively and to variable extents by proton transfer and by trimethylsilylium ion abstraction-the final and key step postulated for alpha-amidoalkylation. Becke3LYP/6-311G(d,p) reaction energetics, charge densities on the electrophilic C-2 site, and AM1 LUMO energies have been used to rationalize the order of intrinsic gas-phase electrophilic reactivity of cyclic iminium and N-acyliminium ions.
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Affiliation(s)
- M G D'Oca
- State University of Campinas - UNICAMP, Institute of Chemistry, CP6154, 13083-970 Campinas, SP Brazil
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Peng ZH, Woerpel KA. Stereoselective synthesis of substituted gamma-butyrolactones by the [3+2] annulation of allylic silanes with chlorosulfonyl isocyanate: enantioselective total synthesis of (+)-blastmycine. Org Lett 2001; 3:675-8. [PMID: 11259034 DOI: 10.1021/ol0069960] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structure: see text]. A stereoselective synthesis of gamma-butyrolactones by the [3 + 2] annulation of allylic silanes with N-chlorosulfonyl isocyanate (CSI) was developed. An enantioselective total synthesis of (+)-blastmycinone was accomplished using this annulation as the key step.
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Affiliation(s)
- Z H Peng
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
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Groaning MD, Brengel GP, Meyers A. Allyldimethyltritylsilane: construction of enantiomerically pure cyclobutano[c]fused pyrrolidines. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00083-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
A new silyl group, the benzhydryldimethylsilyl group, has been developed that is easily synthesized and that undergoes facile oxidation. The [3 + 2] annulation reactions of allylic silanes with this silyl group provide a variety of highly substituted five-membered carbocycles and heterocycles with high stereoselectivities. The silyl groups of these cyclic compounds have been oxidized to hydroxyl groups to demonstrate the general synthetic utility of the method.
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Knölker HJ, Baum E, Graf R, Jones PG, Spieß O. Eine neuartige Dominoreaktion zu einem pentacyclischen Ringsystem durch doppelte Allylsilan-[3+2]-Cycloaddition, Wagner-Meerwein-Umlagerung, Friedel-Crafts-Alkylierung und Eliminierung. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990903)111:17<2742::aid-ange2742>3.0.co;2-g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Bergmeier SC, Fundy SL, Seth PP. Synthesis of bicyclic proline analogs using a formal [3 + 2] intramolecular aziridine-allylsilane cycloaddition reaction. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00425-1] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Cycloadditions of allylsilanes, part 14. Enantiospecific synthesis of bicyclo[4.3.0]nonanes by asymmetric [3+2] cycloaddition of chiral allylsilanes. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00551-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Enantiomeric impurities in chiral catalysts, auxiliaries, synthons and resolving agents. Part 2. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0957-4166(98)00476-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Knölker HJ, Baum E, Schmitt O. Cycloadditions of allylsilanes, part 13. Lewis acid-promoted stereospecific [2+2] cycloaddition of crotylsilanes and methyl propynoate. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)01678-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Akiyama T, Yamanaka M. Stereoselective synthesis of cyclopentanols by Lewis acid-mediated [3+2] annulation of allyldiisopropylphenylsilane with α,β-unsaturated diesters. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)01748-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Groaning MD, Brengel GP, Meyers AI. Allyldimethyltritylsilane. Synthesis of Cyclopentanols, Oxetanes, and Tetrahydrofurans by Reaction with Electron Deficient Olefins. J Org Chem 1998. [DOI: 10.1021/jo9805652] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael D. Groaning
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - Gregory P. Brengel
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - A. I. Meyers
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
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Monti H, Rizzotto D, Léandri G. Nouvelle cyclopentannélation regiosélective par une séquence tandem ouverture electrophile/cycloaddition [3+2] entre cétones méthylènecyclopropaniques et l'allyltriméthylsilane. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00335-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Miura K, Hondo T, Saito H, Ito H, Hosomi A. Highly Stereoselective Intramolecular Addition of a Hydroxyl Group to Vinylsilanes via 1,2-Silyl Migration(1). J Org Chem 1997; 62:8292-8293. [PMID: 11671963 DOI: 10.1021/jo971847p] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katsukiyo Miura
- Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
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Fleming I, Barbero A, Walter D. Stereochemical Control in Organic Synthesis Using Silicon-Containing Compounds. Chem Rev 1997; 97:2063-2192. [PMID: 11848898 DOI: 10.1021/cr941074u] [Citation(s) in RCA: 735] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian Fleming
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, England
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Akiyama T, Nakano M, Kanatani JY, Ozaki S. Novel Lewis Acid Promoted Reactions of Allylsilane Bearing Bulky Silyl Substituents and Aldehydes. CHEM LETT 1997. [DOI: 10.1246/cl.1997.385] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Knölker HJ. Cycloadditions of allylsilances. Part 10. Stereoselective Construction of Ring Systems by Cycloaddition Reactions of allyltriisopropylsilance. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/prac.19973390158] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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