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We enlisted the aid of Professor A. Togni, but his group was also thwarted
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We enlisted the aid of Professor A. Togni, but his group was also thwarted.
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39
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0004250242
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For several X-ray structures, see: Chapman and Hall: New York, NY
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2 symmetric ligands. For example, see: Helmchen, G.; Kudis, S.; Sennhenn, P.; Steinhagen, H. Pure Appl. Chem. 1997, 68, 513 and references 11d and e.
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0344044282
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note
-
11,20 NMR experiments have been used to determine which complex, syn,syn or syn,anti, is kinetically formed. However, all attempts to utilize this approach with our ligand have proven to be unsuccessful.
-
-
-
-
42
-
-
0032484249
-
-
This paper concludes, as we have for our ligands, that the steric interactions associated with the synchronous events of nucleophilic attack and rotation due to the change of hapticity are responsible for the chiral recognition
-
In work published after submission of this manuscript, the possibility that the product derives from regioselective attack on a syn,anti complex has been discussed, see: Ramdeehul, S.; Dierkes, P.; Aquado, R.; Kamer, P. C.; van Leewen, P. W. N. M.; Osborn, J. A. Angew. Chem., Int. Ed. 1998, 37, 3118. This paper concludes, as we have for our ligands, that the steric interactions associated with the synchronous events of nucleophilic attack and rotation due to the change of hapticity are responsible for the chiral recognition.
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Ramdeehul, S.1
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Osborn, J.A.6
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43
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0345338251
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unpublished results in these laboratories
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Hagelin, H., unpublished results in these laboratories.
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Hagelin, H.1
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0344907031
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note
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The results obtained herein provide impetus to reexamine the conclusions for the intermolecular reactions reported in ref 6e and will be reported in due course.
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