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Tsuji M. Geometrical Dependence of the Highest Occupied Molecular Orbital in Bicyclic Systems: π-Facial Stereoselectivity of Bicyclic and Tricyclic Olefins. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Motonori Tsuji
- Graduate School of Pharmaceutical Sciences; University of Tokyo; 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
- Institute of Molecular Function; 2-105-14 Takasu, Misato-shi Saitama 341-0037 Japan
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3
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Cahill KJ, Johnson RP. Beyond Frontier Molecular Orbital Theory: A Systematic Electron Transfer Model (ETM) for Polar Bimolecular Organic Reactions. J Org Chem 2012; 78:1864-73. [DOI: 10.1021/jo301731v] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Katharine J. Cahill
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
| | - Richard P. Johnson
- Department of Chemistry, University of New Hampshire, Durham, New Hampshire 03824, United States
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4
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Quadrelli P, Romano S, Caramella P. Nonbonded Interactions Tune Selectivities in Cycloadditions to 2,3-Dioxabicyclo[2.2.2]oct-5-ene. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000732] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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5
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Park S, Brookhart M. Hydrosilation of Carbonyl-Containing Substrates Catalyzed by an Electrophilic η-Silane Iridium(III) Complex. Organometallics 2010; 29:6057-6064. [PMID: 21572562 DOI: 10.1021/om100818y] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hydrosilation of a variety of ketones and aldehydes using the cationic iridium catalyst, (POCOP)Ir(H)(acetone)(+), 1, (POCOP = 2,6-bis(di-tert-butyl phosphinito)phenyl) is reported. With triethyl silane, all but exceptionally bulky ketones undergo quantitative reactions employing 0.5 mol% catalyst in 20-30 min at 25 °C. Hydrosilation of esters and amides results in over-reduction and cleavage of C-O and C-N bonds, respectively. The diastereoselectivity of hydrosilation of 4-tert-butyl cyclohexanone has been examined using numerous silanes and is highly temperature dependent. Using EtMe(2)SiH, analysis of the ratio of cis:trans hydrosilation products as a function of temperature yields values for ΔΔH(‡) (ΔH(‡) (trans) - ΔH(‡) (cis)) and ΔΔS(‡) (ΔS(‡) (trans) - ΔS(‡)(cis)) of -2.5 kcal/mol and -6.9 e.u., respectively. Mechanistic studies show that the ketone complex, (POCOP)Ir(H)(ketone)(+), is the catalyst resting state and is in equilibrium with low concentration of the silane complex, (POCOP)Ir(H)(HSiR(3))(+). The silane complex transfers R(3)Si(+) to ketone forming the oxocarbenium ion, R(3)SiOCR'(2) (+), which is reduced by the resulting neutral dihydride 3, (POCOP)Ir(H)(2), to yield product R(3)SiOCHR'(2) and (POCOP)IrH(+) which closes the catalytic cycle.
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Affiliation(s)
- Sehoon Park
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
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Electrostatic origin towards the reversal of π-facial selectivity of 5,6-cis,exo-disubstituted bicyclic[2.2.2]oct-2-enes with m-chloroperbenzoic acid and diazomethane: a computational study. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.10.100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Quadrelli P, Mella M, Carosso S, Bovio B, Caramella P. A Straightforward Synthesis of Isoxazoline-Based Carbocyclic Nucleosides from 1,3-Cyclohexadiene through Nitrosocarbonyl Chemistry. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700569] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Lawes DJ, Darwish TA, Clark T, Harper JB, Ball GE. A Rhenium–Cyclohexane Complex with Preferential Binding of Axial CH Bonds: A Probe into the Relative Ability of CH, CD, and CC Bonds as Hyperconjugative Electron Donors? Angew Chem Int Ed Engl 2006; 45:4486-90. [PMID: 16770822 DOI: 10.1002/anie.200600313] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Douglas J Lawes
- School of Chemistry, University of New South Wales, Sydney NSW 2052, Australia
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Lawes DJ, Darwish TA, Clark T, Harper JB, Ball GE. A Rhenium–Cyclohexane Complex with Preferential Binding of Axial CH Bonds: A Probe into the Relative Ability of CH, CD, and CC Bonds as Hyperconjugative Electron Donors? Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600313] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Priyakumar U, Sastry G, Mehta G. Development of predictive models of π-facial selectivity; a critical study of nucleophilic addition to sterically unbiased ketones. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.02.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Mehta G, Singh S, Priyakumar U, Sastry G. The tricyclo[2.1.0.0 2,5 ]pentan-3-one system: a new probe for the study of π-facial selectivity in nucleophilic additions. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00515-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Hou HF, Peddinti RK, Liao CC. Complete pi-facial diastereoselectivity in Diels-Alder reactions of dissymmetric 2,4-cyclohexadienones. Org Lett 2002; 4:2477-80. [PMID: 12123355 DOI: 10.1021/ol020087o] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The studies in the Diels-Alder reactions of 5-methoxy-masked o-benzoquinone (1a, R = OMe) and simple dissymmetric 2,4-cyclohexadienones 1b-e with methyl vinyl ketone, styrene, and benzyl vinyl ether are described. The dienones 1b-e reacted with dienophiles to form syn adducts (dienophile approach is syn to allylic methoxy group) exclusively.
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Affiliation(s)
- Hui-Fang Hou
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan, Republic of China
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Mehta G, Gagliardini V, Priyakumar U, Sastry G. π-Facial selectivities in nucleophilic additions to 4-hetero-tricyclo[5.2.1.02,6]decan-10-ones and 4-hetero-tricyclo[5.2.1.02,6]dec-8-en-10-ones: an experimental and computational study. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00320-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Butkus E, Stoncius A, Malinauskiene J, Tomoda S, Kaneno D. Stereoelectronic and conformational effects on the stereochemical course of reduction of bicyclo[3.3.1]nonane 1,3-diketones. CAN J CHEM 2001. [DOI: 10.1139/v01-131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The stereoselectivity of the reduction of bicyclo[3.3.1]nonane 1,3-diketones was studied. The experimental data of π-facial stereoselection of the reduction of the carbonyl group were successfully rationalized by the application of the exterior frontier orbital extension (EFOE) model. The observed facial diastereoselectivity of the carbonyl reduction of bicyclo[3.3.1]nonane diketones could be reasonably explained by the ground-state facial anisotropy of the frontier orbital extension, steric effects, and the intrinsic reactivity of carbonyl groups. Although the EFOE density and PDAS values predicted the enhanced reactivity at the C-2 carbonyl compared to C-9 carbonyl, transition-state calculations at the B3LYP/6-31+G(d,p) level showed that the reactivity of C-9 and C-2 in a hydride addition to both carbonyl groups should be nearly the same. The EFOE analysis also strongly indicated that in the second hydride reduction step the corresponding oxobicyclononanolates are most likely to be involved in the reduction as the major species rather than the free hydroxyketones. The antiperiplanar effects in the transition states of the LiAlH4 reduction as measured by both the elongation and the natural bond population of the antiperiplanar bonds clearly indicated they should not be an essential factor of the facial diastereoselection of studied diketones.Key words: bicyclo[3.3.1]nonanedione, EFOE model, reduction, stereoselectivity, transition state.
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The bicyclo[2.1.1]hexan-2-one system: a new probe for the experimental and computational study of electronic effects in π-facial selectivity in nucleophilic additions. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01818-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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16
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Di Maio G, Solito G, Rosaria Varı̀ M, Vecchi E. Π-Face Diastereoselection: Stereochemistry and Reactivity of Addition Reactions on Conformationally Rigid Substrates: 5-X-Adamantan-2-ones and trans-10-X-Decal-2-ones. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00594-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Balasubrahmanyam SN, Rao SP, Bhadbhade MM, Sudarsanakumar C, Joseph BK. Molecular Structures of Methyl 5,6-Diaryl-1,2,4-trimethyl-7-oxobicyclo[2.2.1]hept-5-en-2- endo-carboxylates (aryl = phenyl or o-methoxyphenyl). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2000. [DOI: 10.1246/bcsj.73.941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Ghosh M, Kakarla R, Sofia MJ. Diastereofacial selection in the 1,2-addition of MeMgX and McLi to 4-oxo sugar:Efficient synthesis of 4-C-methyl-l-S-β-D-gluco- and galactopyranoside building blocks of moenomycin. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00823-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Adcock W, Trout NA. Nature of the electronic factor governing diastereofacial selectivity in some reactions of rigid saturated model substrates. Chem Rev 1999; 99:1415-36. [PMID: 11749451 DOI: 10.1021/cr980380v] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- W Adcock
- Department of Chemistry, The Flinders University of South Australia, Adelaide, Australia 5001
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20
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Gung BW. Structure distortions in heteroatom-substituted cyclohexanones, adamantanones, and adamantanes: origin of diastereofacial selectivity. Chem Rev 1999; 99:1377-86. [PMID: 11749449 DOI: 10.1021/cr980365q] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- B W Gung
- Department of Chemistry, Miami University, Oxford, Ohio 45056
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Kaselj M, Chung WS, le Noble WJ. Face selection in addition and elimination in sterically unbiased systems. Chem Rev 1999; 99:1387-414. [PMID: 11749450 DOI: 10.1021/cr980364y] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M Kaselj
- Department of Chemistry, State University of New York, Stony Brook, New York 11794, and Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30050, Republic of China
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Dannenberg JJ. Using perturbation and frontier molecular orbital theory to predict diastereofacial selectivity. Chem Rev 1999; 99:1225-42. [PMID: 11749445 DOI: 10.1021/cr980382f] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J J Dannenberg
- Department of Chemistry, City University of New York, Hunter College and the Graduate School, 695 Park Avenue, New York, New York 10021
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Wipf P, Jung JK. Nucleophilic additions to 4,4-disubstituted 2,5-cyclohexadienones: can dipole effects control facial selectivity? Chem Rev 1999; 99:1469-80. [PMID: 11749453 DOI: 10.1021/cr9803838] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- P Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
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R. Rablen P, W. Hoffmann R, A. Hrovat D, Thatcher Borden W. Is hyperconjugation responsible for the “gauche effect” in 1-fluoropropane and other 2-substituted-1-fluoroethanes? †. ACTA ACUST UNITED AC 1999. [DOI: 10.1039/a901974j] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Kaselj M, Gonikberg EM, le Noble WJ. Effect of Remote Substitution on Face Selection in Addition Reactions of Nor- and Homoadamantan-9-ones and of Several Analogues. J Org Chem 1998. [DOI: 10.1021/jo9718197] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mira Kaselj
- Department of Chemistry, State University of New York, Stony Brook, New York 11794-3400
| | - Elena M. Gonikberg
- Department of Chemistry, State University of New York, Stony Brook, New York 11794-3400
| | - William J. le Noble
- Department of Chemistry, State University of New York, Stony Brook, New York 11794-3400
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27
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Dimitroff M, Fallis AG. Studies of π-diastereofacial selectivity: The influence of α-oxathiolane ketals on cyclic ketones. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00406-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Dimitroff M, Fallis AG. Studies of π-diastereofacial selectivity: Spiro 2-tetrahydrofuran and 2-tetrahydrothiophene ketones. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00407-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Fraser RR, Faibish NC, Kong F, Bednarski K. Stereodependence of the Effect of α Substituents on the Face Reactivity of Conformationally Rigid Ketones toward Metal Hydrides. Is There an Antiperiplanar (Cieplak) Effect? J Org Chem 1997. [DOI: 10.1021/jo970428p] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert R. Fraser
- Ottawa-Carleton Chemistry Institute, University of Ottawa, 10 Marie Curie Street, Ottawa, Canada K1N 6N5
| | - Neil C. Faibish
- Ottawa-Carleton Chemistry Institute, University of Ottawa, 10 Marie Curie Street, Ottawa, Canada K1N 6N5
| | - Fanzuo Kong
- Ottawa-Carleton Chemistry Institute, University of Ottawa, 10 Marie Curie Street, Ottawa, Canada K1N 6N5
| | - Krzysztof Bednarski
- Ottawa-Carleton Chemistry Institute, University of Ottawa, 10 Marie Curie Street, Ottawa, Canada K1N 6N5
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Wipf P, Jung JK. Weitreichende elektrostatische Effekte in der Synthese: dipolkontrollierte nucleophile Addition an ein Naphthochinonacetal — Modelluntersuchungen zur Darstellung von Diepoxin σ. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971090723] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Safont VS, Moliner V, Oliva M, Castillo R, Andrés J, González F, Carda M. A Theoretical Study of Addition of Organomagnesium Reagents to Chiral α-Alkoxy Carbonyl Compounds. J Org Chem 1996. [DOI: 10.1021/jo952197x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vicent S. Safont
- Departament de Ciències Experimentals and Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Box 242, 12080 Castelló, Spain
| | - Vicente Moliner
- Departament de Ciències Experimentals and Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Box 242, 12080 Castelló, Spain
| | - Mónica Oliva
- Departament de Ciències Experimentals and Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Box 242, 12080 Castelló, Spain
| | - Raquel Castillo
- Departament de Ciències Experimentals and Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Box 242, 12080 Castelló, Spain
| | - Juán Andrés
- Departament de Ciències Experimentals and Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Box 242, 12080 Castelló, Spain
| | - Florenci González
- Departament de Ciències Experimentals and Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Box 242, 12080 Castelló, Spain
| | - Miguel Carda
- Departament de Ciències Experimentals and Departament de Química Inorgànica i Orgànica, Universitat Jaume I, Box 242, 12080 Castelló, Spain
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Gung BW. Diastereofacial selection in nucleophilic additions to unsymmetrically substituted trigonal carbons. Tetrahedron 1996. [DOI: 10.1016/0040-4020(95)01023-8] [Citation(s) in RCA: 107] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Rosenberg RE, Vilardo JS. The importance of entropy in stereoselection. Reduction of tert-butylcyclohexanone by lithium aluminum hydride. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)00229-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Paquette LA, Lobben PC. π-Facial Diastereoselection in the 1,2-Addition of Allylmetal Reagents to 2-Methoxycyclohexanone and Tetrahydrofuranspiro-(2-cyclohexanone). J Am Chem Soc 1996. [DOI: 10.1021/ja9536835] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Leo A. Paquette
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
| | - Paul C. Lobben
- Contribution from the Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210
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π-Facial diastereoselectivity in electrophilic additions and 1,3-dipolar cycloadditions to bicyclo[2.2.2]oct-2-enes 5,6-cis,exo-disubstituted with electron withdrawing groups. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(95)02384-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rastelli A, Bagatti M, Gandolfi R, Burdisso M. Model calculations of chemical interactions. Part 7.—Role of vicinial delocalization in the regiochemical control of the cycloaddition of diazomethane and formonitrile oxide to methyl vinyl ether. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/ft9949001077] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mehta G, Khan FA, Ganguly B, Chandrasekhar J. π-Facial diastereoselection in reductions of sterically unbiased ketones containing the norbornyl framework: further tests for theoretical models. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/p29940002275] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Williams L, Paddon-Row MN. Electrostatic and steric control of π-facial stereoselectivity in nucleophilic additions of LiH and MeLi to endo-5,6-disubstituted norbornen-7-ones: an ab initio MO study. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/c39940000353] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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AM1 and polarized-? frontier molecular orbital (PPFMO) studies of facial selectivity in hydrogen transfer to substituted adamantyl radicals. J PHYS ORG CHEM 1993. [DOI: 10.1002/poc.610061206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Coxon JM, Luibrand RT. Transition state hyperconjugation as a cause of π-facial selection in cyclohexanones. Tetrahedron Lett 1993. [DOI: 10.1016/s0040-4039(00)61608-8] [Citation(s) in RCA: 9] [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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44
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Frenking G, Köhler K, Reetz M. On the origin of π-facial diastereoselectivity in nucleophilic additions to chiral carbonyl compounds 4. Calculated transition state structures for the addition of nucleophiles to 2-methoxypropanal and 2-N,N-dimethyl-aminopropanal. Tetrahedron 1993. [DOI: 10.1016/s0040-4020(01)89912-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Jones GR, Vogel P. π-Facial diastereoselectivity in the electrophilic and electrophilic–nucleophilic additions to dimethyl (1R,2R,3S,4S)-bicyclo[2.2.2]oct-5-ene-2,3-dicarboxylate. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/c39930000769] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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