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4644278756
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note
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Rotameric mixtures have been observed when the N-protecting group is -CHO, see ref.[8]
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21
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4644319056
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note
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6]benzene at room temperature.
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23
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33750800345
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D. Seebach, B. Lamatsch, R. Amstutz, A. K. Beck, M. Dobler, M. Egli, R. Fitzi, M. Gautschi, B. Herradón, P. C. Hidber, J. J. Irwin, R. Locher, M. Maestro, T. Maetzke, A. Mouriño, E. Pfammatter, D. A. Plattner, C. Schickli, W. B. Schweizer, P. Seiler, G. Stucky, W. Petter, J. Escalante, E. Juaristi, D. Quintana, C. Miravitlles, E. Molins, Helv. Chim. Acta 1992, 75, 913-934.
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Seebach, D.1
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Herradón, B.9
Hidber, P.C.10
Irwin, J.J.11
Locher, R.12
Maestro, M.13
Maetzke, T.14
Mouriño, A.15
Pfammatter, E.16
Plattner, D.A.17
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Stucky, G.21
Petter, W.22
Escalante, J.23
Juaristi, E.24
Quintana, D.25
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more..
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24
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0009394649
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Similar difficulties have been encountered in the alkylation of other sterically hindered enolates: A. J. H. Klunder, J. H. M. Lange, B. Zwanenburg, Tetrahedron Lett. 1987, 28, 3027-3030.
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Klunder, A.J.H.1
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25
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0035798049
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Very recently it was shown that Michael addition of 1b to ethyl acrylate takes place only with low yield: J. Zhang, J. L. Flippen-Anderson, A. P. Kozikowski, J. Org. Chem. 2001, 66, 7555-7559.
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0031059866
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(Eds.: C. W. Carter, Jr. and R. M. Sweet), Academic Press, New York
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Z. Otwinowski, W. Minor, Methods in Enzymology, Macromolecular Crystallography, Part A, (Eds.: C. W. Carter, Jr. and R. M. Sweet), Academic Press, New York, 1997, 307-326.
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