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Volumn 60, Issue 6, 1995, Pages 1788-1799

On the Ti-TADDOLate-Catalyzed Diels-Alder Addition of 3-Butenoyl-l,3-oxazolidin-2-one to Cyclopentadiene. General Features of Ti-BINOLate- and Ti-TADDOLate-Mediated Reactions

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EID: 0000826366     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo00111a042     Document Type: Article
Times cited : (171)

References (140)
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    • Part of the dissertation No. 10283 of D.A.P., ETH Zurich, 1993.
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    • This was observed previously for Ti-TADDOLate-mediated nu-cleophilic additions; see references cited in
    • This was observed previously for Ti-TADDOLate-mediated nu-cleophilic additions; see references cited in: Seebach, D.; Beck, A. K.; Schiess, M.; Widler, L.; Wonnacott, A. Pure Appl. Chem. 1983, 55, 1807-1822.
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    • For a review article with references to the original literature see Paquette, L. A., Ed.; John Wiley & Sons: Chichester (expected publication date in early a copy of the manuscript may be requested from the corresponding author of the present paper)
    • For a review article with references to the original literature see: Dahinden, R.; Beck, A. K.; Seebach, D. In Encyclopedia of Reagents for Organic Synthesis; Paquette, L. A., Ed.; John Wiley & Sons: Chichester (expected publication date in early 1995; a copy of the manuscript may be requested from the corresponding author of the present paper).
    • (1995) Encyclopedia of Reagents for Organic Synthesis
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    • Universitát Frankfurt/Main, Germany In this thesis it is also shown that the titanate of (P)-BINOLate gives the same enantiomer preferentially which is formed with Ti-(S, S)-TADDOLate
    • Doring, W. Totalsynthese von (-)-Norgestrel über enantioselektive Diels-Alder-Reaktion. Dissertation, Fachbereich Chemie, Universitát Frankfurt/Main, Germany, 1994. In this thesis it is also shown that the titanate of (P)-BINOLate gives the same enantiomer preferentially which is formed with Ti-(S, S)-TADDOLate.
    • (1994) Totalsynthese von (-)-Norgestrel über enantioselektive Diels-Alder-Reaktion. Dissertation, Fachbereich Chemie
    • Doring, W.1
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    • For review articles about the use of Ti-TADDOLates as chiral Lewis acids see ref 7. and
    • For review articles about the use of Ti-TADDOLates as chiral Lewis acids see ref 7. and: Narasaka, K. Synthesis 1991, 1-11.
    • (1991) Synthesis , pp. 1-11
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    • The effect of high pressure on Ti-TADDOLate-mediated reactions was also studied
    • The effect of high pressure on Ti-TADDOLate-mediated reactions was also studied: Tietze, L. F.; Ott, C.; Gerke, K.; Buback, M. Angew. Chem. 1993, 105, 1536-1538;
    • (1993) Angew. Chem. , vol.105 , pp. 1536-1538
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    • According to Narasaka et al. the alcohol is a “bystander” and does not react with A* (X = Y = Cl) to give the “real” catalyst
    • According to Narasaka et al. the alcohol is a “bystander” and does not react with A* (X = Y = Cl) to give the “real” catalyst: Iwasawa, N.; Hayashi, Y.; Sakurai, H.; Narasaka, K. Chem. Lett. 1989, 1581-1584.
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    • For other examples of nonlinear plots between NNNNc/< NNNNee of auxiliary and of product see: (a)
    • For other examples of nonlinear plots between NNNNc/< NNNNee of auxiliary and of product see: (a) Puchot, C.; Samuel, O.; Dunach, E.; Zhao, S.; Agamí, C.; Kagan, H. B. J. Am. Chem. Soc. 1986, 108, 2353-2357.
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    • To account for a second chiral ligand in the coordination sphere of the active center we could have a dimeric complex possibly formed through attachment at the position X in I-M. See also the recent report of an oxygen bridged dimeric complex formed upon heating in toluene a BINOLate TiCVi-PrOH mixture, with no consequence for the topicity of the catalyzed ene reaction
    • To account for a second chiral ligand in the coordination sphere of the active center we could have a dimeric complex possibly formed through attachment at the position X in I-M. See also the recent report of an oxygen bridged dimeric complex formed upon heating in toluene a BINOLate TiCVi-PrOH mixture, with no consequence for the topicity of the catalyzed ene reaction: Terada, M.; Mikami, K. J. Chem. Soc, Chem. Commun. 1994, 833-834.
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    • For NMR investigations of complexes formed from a BOX derivative and Sn or A1 Lewis acids see
    • For NMR investigations of complexes formed from a BOX derivative and Sn or A1 Lewis acids see: Castellino, S. J. Org. Chem. 1990, 55, 5197-5200.
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    • For examples of reactions of BINOLates and TADDOLates with other metal centers such as boron (a), magnesium (b), aluminum (c), zirconium (d), molybdenum (e), and the lanthanides (f) see: Reference 32
    • For examples of reactions of BINOLates and TADDOLates with other metal centers such as boron (a), magnesium (b), aluminum (c), zirconium (d), molybdenum (e), and the lanthanides (f) see: Reference 32. Ishihara, K.; Yamamoto, H. J. Am. Chem. Soc. 1994, 116, 1561-1562.
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    • Singh, V. K. Synthesis 1992, 605-617. Dahinden, R. Diplomarbeit (Master's Thesis), ETH Zürich, 1991/92, unpublished results, (d) Reference 34d.
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    • In the reaction of quiñones with styrenes furnishing [2 + 2] cycloadducts 62, Engler and his collegues also observe the formation of [5 + 2] cycloadducts (bicyclo[3.2.1]oct-3-ene-2,8-diones) which have a configuration compatible with attack of the styrene to the 3- and 5-position of the quinone from the same face from which the [2 + 2] cycloaddition occuss (see K in Chart 5), see ref 22a. and: (a)
    • In the reaction of quiñones with styrenes furnishing [2 + 2] cycloadducts 62, Engler and his collegues also observe the formation of [5 + 2] cycloadducts (bicyclo[3.2.1]oct-3-ene-2,8-diones) which have a configuration compatible with attack of the styrene to the 3- and 5-position of the quinone from the same face from which the [2 + 2] cycloaddition occuss (see K in Chart 5), see ref 22a. and: (a) Engler, T. A.; Combrink, K. D.; Letavic, M. A.; Lynch, K. O., Jr.; Ray, J. E. J. Org. Chem. 1994, 59, 6567-6587.
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