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Examples of β-C-glycoside synthesis by Kishi's Lewis acid prompted silane reduction; see: (a) Lancelin, J.-M.; Zollo, P. H. A.; Sinay, P. Tetrahedron Lett. 1983, 24, 4833-4836. (b) Kraus, G. A.; Molina, M. T. J. Org. Chem. 1988, 53, 752-753. (c) Czernecki, S.; Ville, G. J. Org. Chem. 1989, 54, 610-612. (d) Dondoni, A.; Marra, A.; Scherrmann, M.-C. Tetrahedron Lett. 1993, 34, 7323-7326. (e) Xie, J.; Durrat, F.; Valéry, J.-M. J. Org. Chem. 2003, 68, 7896-7898.
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19
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Examples of β-C-glycoside synthesis by Kishi's Lewis acid prompted silane reduction; see: (a) Lancelin, J.-M.; Zollo, P. H. A.; Sinay, P. Tetrahedron Lett. 1983, 24, 4833-4836. (b) Kraus, G. A.; Molina, M. T. J. Org. Chem. 1988, 53, 752-753. (c) Czernecki, S.; Ville, G. J. Org. Chem. 1989, 54, 610-612. (d) Dondoni, A.; Marra, A.; Scherrmann, M.-C. Tetrahedron Lett. 1993, 34, 7323-7326. (e) Xie, J.; Durrat, F.; Valéry, J.-M. J. Org. Chem. 2003, 68, 7896-7898.
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20
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0000698306
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Examples of β-C-glycoside synthesis by Kishi's Lewis acid prompted silane reduction; see: (a) Lancelin, J.-M.; Zollo, P. H. A.; Sinay, P. Tetrahedron Lett. 1983, 24, 4833-4836. (b) Kraus, G. A.; Molina, M. T. J. Org. Chem. 1988, 53, 752-753. (c) Czernecki, S.; Ville, G. J. Org. Chem. 1989, 54, 610-612. (d) Dondoni, A.; Marra, A.; Scherrmann, M.-C. Tetrahedron Lett. 1993, 34, 7323-7326. (e) Xie, J.; Durrat, F.; Valéry, J.-M. J. Org. Chem. 2003, 68, 7896-7898.
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21
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Examples of β-C-glycoside synthesis by Kishi's Lewis acid prompted silane reduction; see: (a) Lancelin, J.-M.; Zollo, P. H. A.; Sinay, P. Tetrahedron Lett. 1983, 24, 4833-4836. (b) Kraus, G. A.; Molina, M. T. J. Org. Chem. 1988, 53, 752-753. (c) Czernecki, S.; Ville, G. J. Org. Chem. 1989, 54, 610-612. (d) Dondoni, A.; Marra, A.; Scherrmann, M.-C. Tetrahedron Lett. 1993, 34, 7323-7326. (e) Xie, J.; Durrat, F.; Valéry, J.-M. J. Org. Chem. 2003, 68, 7896-7898.
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Examples of β-C-glycoside synthesis by Kishi's Lewis acid prompted silane reduction; see: (a) Lancelin, J.-M.; Zollo, P. H. A.; Sinay, P. Tetrahedron Lett. 1983, 24, 4833-4836. (b) Kraus, G. A.; Molina, M. T. J. Org. Chem. 1988, 53, 752-753. (c) Czernecki, S.; Ville, G. J. Org. Chem. 1989, 54, 610-612. (d) Dondoni, A.; Marra, A.; Scherrmann, M.-C. Tetrahedron Lett. 1993, 34, 7323-7326. (e) Xie, J.; Durrat, F.; Valéry, J.-M. J. Org. Chem. 2003, 68, 7896-7898.
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In the transition state of nucleophilic addition reactions to carbonyls, the energy of the transition state can be lowered by hyperconjugation between an antiperiplanar vicinal σ-bond to the antibonding component (σ*‡) of the newly forming bond; see: (a) Cieplak, A. S. J. Am. Chem. Soc. 1981, 103, 4540-4552. (b) Cieplak, A. S.; Tait, B. D.; Johnson, C. R. J. Am. Chem. Soc. 1989, 111, 8447-8462. (c) Cieplak, A. S. Chem. Rev. 1999, 99, 1265-1336.
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In the transition state of nucleophilic addition reactions to carbonyls, the energy of the transition state can be lowered by hyperconjugation between an antiperiplanar vicinal σ-bond to the antibonding component (σ*‡) of the newly forming bond; see: (a) Cieplak, A. S. J. Am. Chem. Soc. 1981, 103, 4540-4552. (b) Cieplak, A. S.; Tait, B. D.; Johnson, C. R. J. Am. Chem. Soc. 1989, 111, 8447-8462. (c) Cieplak, A. S. Chem. Rev. 1999, 99, 1265-1336.
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0001376012
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In the transition state of nucleophilic addition reactions to carbonyls, the energy of the transition state can be lowered by hyperconjugation between an antiperiplanar vicinal σ-bond to the antibonding component (σ*‡) of the newly forming bond; see: (a) Cieplak, A. S. J. Am. Chem. Soc. 1981, 103, 4540-4552. (b) Cieplak, A. S.; Tait, B. D.; Johnson, C. R. J. Am. Chem. Soc. 1989, 111, 8447-8462. (c) Cieplak, A. S. Chem. Rev. 1999, 99, 1265-1336.
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0034629293
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For a highly β-stereoselective O-glycosylation using conformationally restricted 4,6-O-benzylidenemannose donors, see: Crich, D.; W. Cai, W.; Dai, Z. J. Org. Chem. 2000, 65, 1291-1297.
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37
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0034604499
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de Kort, M.; Regenbogen, A. D.; Valentijn, A. R. P. M.; Challiss, R. A. J.; Iwata, Y.; Miyamoto, S.; van der Marel, G. A.; van Boom, J. H. Chem. Eur. J. 2000, 6, 2696-2704.
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Miyamoto, S.6
Van Der Marel, G.A.7
Van Boom, J.H.8
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38
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7044246764
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note
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2 was used as the Lewis acid, the 3,4-cyclic ketal moiety of the conformationally restricted substrates was partially reduced.
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39
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7044254158
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note
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1,2 values for the C-glucosides or by NOE experiments for the C-mannosides.
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