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59649121288
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Aponick, A.; Li, C.-Y.; Palmes, J. A. Org. Lett. 2009, 11, 121
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(2009)
Org. Lett.
, vol.11
, pp. 121
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Aponick, A.1
Li, C.-Y.2
Palmes, J.A.3
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82
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77951192810
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3 was also evaluated in order to catalyze the cyclization and lead to the same result as observed with the more easy-to-handle hexahydrate.
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3 was also evaluated in order to catalyze the cyclization and lead to the same result as observed with the more easy-to-handle hexahydrate.
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83
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77951152609
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2, no conversion was observed.
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2, no conversion was observed.
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84
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77951163023
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Due to synthetic purposes, N -protected -amino allylic acetates were used in this study rather than the corresponding N -protected -amino allylic alcohols. See the Supporting Information for details.
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Due to synthetic purposes, N -protected -amino allylic acetates were used in this study rather than the corresponding N -protected -amino allylic alcohols. See the Supporting Information for details.
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-
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85
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77951151688
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The cis -relationship for piperidine 4a was unambiguously established by X-ray structure analysis. See the Supporting Information for details. The cis -relationship for piperidines 4b - g was assigned by comparison with piperidine 4a.
-
The cis -relationship for piperidine 4a was unambiguously established by X-ray structure analysis. See the Supporting Information for details. The cis -relationship for piperidines 4b - g was assigned by comparison with piperidine 4a.
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86
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77951175372
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Similar allylic substrates have been previously used for related cyclizations using Pd, Ir, or Au catalysts; see refs 3c, 15b, and 16.
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Similar allylic substrates have been previously used for related cyclizations using Pd, Ir, or Au catalysts; see refs 3c, 15b, and 16.
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87
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77951168195
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The cis -relationship was confirmed by NOE experiments for tetrahydropyrans 6b, 6d, 6g, and 6i.
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The cis -relationship was confirmed by NOE experiments for tetrahydropyrans 6b, 6d, 6g, and 6i.
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-
-
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88
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77951151069
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(1 RS,7 R)- 5e was prepared from the commercially available (R)-propylene oxide (ee >98%).
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(1 RS,7 R)- 5e was prepared from the commercially available (R)-propylene oxide (ee >98%).
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-
-
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89
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77951166745
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In this case, the equilibration conditions led to the formation of the most stable spiroketal resulting from double anomeric stabilization.
-
In this case, the equilibration conditions led to the formation of the most stable spiroketal resulting from double anomeric stabilization.
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