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See for example
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-
See Supporting Information for catalyst optimization studies.
-
-
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45
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78650344898
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For a recent example on the use of the 2-pyridine unit as activating group in asymmetric metal catalyzed reactions, see
-
For a recent example on the use of the 2-pyridine unit as activating group in asymmetric metal catalyzed reactions, see
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47
-
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78650368364
-
-
note
-
. The resulting residue was purified by silica gel flash chromatography (hexane-EtOAc 1:2) to afford exo-2a (70.5 mg, 85%, white solid).
-
-
-
-
48
-
-
78650333235
-
-
See Supporting Information for details of the X-ray structure of exo - 2g, exo -10g, and exo - 11g. CCDC 784831, CCDC 784832, and CCDC 784833 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge via
-
See Supporting Information for details of the X-ray structure of exo-2g, exo -10g, and exo-11g. CCDC 784831, CCDC 784832, and CCDC 784833 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/data-request/cif.
-
-
-
-
49
-
-
78650375416
-
-
By analogy with the 1,3-dipolar cycloaddition of -iminoesters, exo refers to the pyrrolidine adduct with trans stereochemistry at C2 - C3
-
By analogy with the 1,3-dipolar cycloaddition of -iminoesters, exo refers to the pyrrolidine adduct with trans stereochemistry at C2 - C3.
-
-
-
-
50
-
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78650383679
-
-
For catalytic asymmetric 1,3-dipolar cycloaddition of azomethine ylides with nitroalkenes, see: refs 3b and 3j
-
For catalytic asymmetric 1,3-dipolar cycloaddition of azomethine ylides with nitroalkenes, see: refs 3b and 3j.
-
-
-
-
51
-
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78650408801
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-
For the use of enones as dipolarophiles, see refs 3e and 3l
-
For the use of enones as dipolarophiles, see refs 3e and 3l.
-
-
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