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77956050728
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Oxazolidinone has been known to be a parasitic dead end as it proposed to decrease the concentration of the active iminium ion. See references dand ].
-
Oxazolidinone has been known to be a parasitic dead end as it proposed to decrease the concentration of the active iminium ion. See references dand ].
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44
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77956044164
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-
See the Supporting Information for full details of the computational methods
-
See the Supporting Information for full details of the computational methods.
-
-
-
-
45
-
-
7444257444
-
-
The B3LYP functional is known to be quite successful in studying stereoselectivity in organocatalytic reactions. For examples, see references [11a]and [12b]
-
The B3LYP functional is known to be quite successful in studying stereoselectivity in organocatalytic reactions. For examples, see references 1aand 2band P. H.-Y. Cheong, K. N. Houk, J. Am. Chem. Soc. 2004, 126, 13912-13913.
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46
-
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77956048532
-
-
-1. See Table S2 and Figure S4 in the Supporting Information for further details
-
-1. See Table S2 and Figure S4 in the Supporting Information for further details.
-
-
-
-
47
-
-
77956054256
-
-
-1, respectively, for 3a and 3b
-
-1, respectively, for 3a and 3b.
-
-
-
-
48
-
-
77956014401
-
-
The endo/exo nomenclature is assigned on the basis of the orientation of the ethyl group with respect to the bicyclic oxazolidinone ring
-
The endo/exo nomenclature is assigned on the basis of the orientation of the ethyl group with respect to the bicyclic oxazolidinone ring.
-
-
-
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49
-
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77956027490
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-
A comparative energy profile diagram is provided in Figure S2 in the Supporting Information
-
A comparative energy profile diagram is provided in Figure S2 in the Supporting Information.
-
-
-
-
50
-
-
77956051379
-
-
Note that the generation of 3 from proline and propanal involves the release of a molecule of water in the dehydration step
-
Note that the generation of 3 from proline and propanal involves the release of a molecule of water in the dehydration step.
-
-
-
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51
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77956029543
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-
We and others have earlier demonstrated the energetic advantages associated with water-assisted proton transfers in organocatalytic reactions
-
We and others have earlier demonstrated the energetic advantages associated with water-assisted proton transfers in organocatalytic reactions.
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52
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70249113777
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60749108597
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37849051960
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56
-
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77956037849
-
-
The likely involvement of 1) water, 2) base, or 3) solvent in the assisted proton transfer is examined
-
The likely involvement of 1) water, 2) base, or 3) solvent in the assisted proton transfer is examined.
-
-
-
-
57
-
-
77956037361
-
-
3)DMF
-
3)DMF.
-
-
-
-
58
-
-
77956018839
-
-
In the lower-energy TSs, the developing charge on the alkoxide moiety of propanal benefits from the stabilization offered by the carboxylic acid group. See Figure S6 in the Supporting Information
-
In the lower-energy TSs, the developing charge on the alkoxide moiety of propanal benefits from the stabilization offered by the carboxylic acid group. See Figure S6 in the Supporting Information.
-
-
-
-
59
-
-
77956041953
-
-
[13]). The present discrepancy could perhaps be attributed to such known limitations. Furthermore, this functional is predominantly calibrated against thermodynamic, not kinetic, quantities such as those reported here
-
[13]). The present discrepancy could perhaps be attributed to such known limitations. Furthermore, this functional is predominantly calibrated against thermodynamic, not kinetic, quantities such as those reported here.
-
-
-
-
60
-
-
77956043299
-
-
The optimized geometries of solvent (or base)-assisted conversion of 3 to 4 or 8 are provided in Figure S5 in the Supporting Information
-
The optimized geometries of solvent (or base)-assisted conversion of 3 to 4 or 8 are provided in Figure S5 in the Supporting Information.
-
-
-
-
61
-
-
77956026822
-
-
The optimized TS geometries for additional stereochemical possibilities are provided in Figure S7 in the Supporting Information
-
The optimized TS geometries for additional stereochemical possibilities are provided in Figure S7 in the Supporting Information.
-
-
-
-
62
-
-
77956051378
-
-
-1 higher in energy
-
-1 higher in energy.
-
-
-
-
63
-
-
77956054511
-
-
See Tables S6 and S7 and Figure S8 in the Supporting Information
-
See Tables S6 and S7 and Figure S8 in the Supporting Information.
-
-
-
-
64
-
-
77956043542
-
-
-1. See also Table S5 in the Supporting Information
-
-1. See also Table S5 in the Supporting Information.
-
-
-
-
65
-
-
77956029754
-
-
(180), responsible for the diastereomeric products
-
(180), responsible for the diastereomeric products.
-
-
-
-
66
-
-
77956047513
-
-
See Tables S6 and S7 in the Supporting Information for further details
-
See Tables S6 and S7 in the Supporting Information for further details.
-
-
-
-
67
-
-
77956048744
-
-
Further details on other possible geometries of 9a/9b are provided in Figure S9 and Tables S9 and S10 in the Supporting Information
-
Further details on other possible geometries of 9a/9b are provided in Figure S9 and Tables S9 and S10 in the Supporting Information.
-
-
-
-
68
-
-
77956048394
-
-
-1 in the solvent phase
-
-1 in the solvent phase.
-
-
-
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69
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70349254028
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S. E. Wheeler, A. Moran, S. N. Pieniazek, K. N. Houk, J. Phys. Chem. A 2009, 113, 10376-10384.
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77956018169
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-
Gaussian 03 (RevisionsC.02/E.01), Gaussian, Inc., Wallingford, CT, (see Computational Methods in the Supporting Information for full citation)
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Gaussian 03 (RevisionsC.02/E.01), M. J. Frisch et al., Gaussian, Inc., Wallingford, CT, 2004 (see Computational Methods in the Supporting Information for full citation).
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Frisch, M.J.1
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