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Experiments with peptides bearing a protected secondary amine or a protected carboxylic acid were either not catalytically active or showed significantly poorer catalytic properties; see the Supporting Information
-
Experiments with peptides bearing a protected secondary amine or a protected carboxylic acid were either not catalytically active or showed significantly poorer catalytic properties; see the Supporting Information.
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66
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For an organocatalytic route to β2-amino acids see: a
-
2-amino acids see: a) Y. Chi, E. P. English, W. C. Pomerantz, W. S. Horne, L. A. Joyce, L. R. Alexander, W. S. Fleming, E. A. Hopkins, S. H. Gellman, J. Am. Chem. Soc. 2007, 129, 6050-6055;
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68
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53549109109
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For examples of the use of 5 mol% of catalyst and efficient catalysis with aliphatic aldehydes see reference [10
-
For examples of the use of 5 mol% of catalyst and efficient catalysis with aliphatic aldehydes see reference [10].
-
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69
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53549126308
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Peptides 1 and 4 can be easily prepared on a 10-g scale within a day by standard solid-phase synthesis using the Fmoc/tBu protocol for peptide synthesis.
-
Peptides 1 and 4 can be easily prepared on a 10-g scale within a day by standard solid-phase synthesis using the Fmoc/tBu protocol for peptide synthesis.
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70
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84986437005
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F. Mohamadi, N. G. J. Richards, W. C. Guida, R. Liskamp, M. Lipton, C. Caufield, G. Chang, T. Hendrickson, W. C. Still, J. Comput. Chem. 1990, 11, 440-467.
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0029912748
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Calculations were performed by using the OPLS-AA force field
-
Calculations were performed by using the OPLS-AA force field: W. L. Jorgensen, D. S. Maxwell, J. Tirado-Rives, J. Am. Chem. Soc. 1996, 118, 11225-11236.
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53549124931
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Molecular modelling studies with peptides 2 and 3 revealed lowest energy conformations similar to that of peptide 1, thereby accounting for their respective stereoselectivities, see the Supporting Information.
-
Molecular modelling studies with peptides 2 and 3 revealed lowest energy conformations similar to that of peptide 1, thereby accounting for their respective stereoselectivities, see the Supporting Information.
-
-
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73
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38949133131
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While this manuscript was in press, an excellent article by Ma and co-workers appeared on the title reaction. See: S. Zhu, S. Yu, D. Ma, Angew. Chem. Int. Ed. 2008, 47, 545-548
-
While this manuscript was in press, an excellent article by Ma and co-workers appeared on the title reaction. See: S. Zhu, S. Yu, D. Ma, Angew. Chem. Int. Ed. 2008, 47, 545-548.
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