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9
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84948263593
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For asymmetric versions of the NHK reaction using stoichiometric amounts of chiral organochromium agents, see: a) B. Cazes, C. Verniere, J. Goré, Synth. Commun. 1983, 13, 73-79; b) K. Sugimoto, S. Aoyagi, C. Kibayashi, J. Org. Chem. 1997, 62, 2322-2323; and ref. [3a].
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10
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0001567540
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and ref [3a]
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For asymmetric versions of the NHK reaction using stoichiometric amounts of chiral organochromium agents, see: a) B. Cazes, C. Verniere, J. Goré, Synth. Commun. 1983, 13, 73-79; b) K. Sugimoto, S. Aoyagi, C. Kibayashi, J. Org. Chem. 1997, 62, 2322-2323; and ref. [3a].
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18
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0037069728
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f) After submission of this manuscript, a report by Kishi et al. on a catalytic enantioselective process using an oxazoline sulfonamide ligand appeared: H.-W. Choi, K. Nakajima, D. Demeke, F.-A. Kang, H.-S. Jun, Z.-K. Wan, Y. Kishi, Org. Lett. 2002, 4, 4435-4438. However, the enantioselectivities reported are not as high as our best examples.
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Choi, H.-W.1
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20
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0002236597
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For two examples, see: a) X.-G. Zhou, J.-S. Huang, X.-Q. Yu, Z.-Y. Zhou, C.-M. Che, J. Chem. Soc. Dalton Trans. 2000, 1075-1080;
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Zhou, X.-G.1
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0001855867
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26
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0242392837
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note
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A full account of the synthesis and configurational assignment of (+)- and (-)-DIANANE (9) will be published elsewhere.
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27
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0000008279
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K. Ishihara, M. Mouri, Q. Gao, T Maruyama, K. Furuta, H. Yamamoto, J. Am. Chem. Soc. 1993, 115, 11490-11495.
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V. K. Tandon, A. M. van Leusen, H. Wynberg, J. Org. Chem. 1983, 48, 2767-2769.
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Y. Wu, L. Esser, J. K. De Brabander, Angew. Chem. 2000, 112, 4478-4480; Angew. Chem. Int. Ed. 2000, 39, 4308-4310.
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32
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0024996179
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The synthesis of the aldehyde was performed according to: a) M. J. Martinelli, J. Org. Chem. 1990, 55, 5065-5073; b) T. Oka, A. Murai, Tetrahedron 1998, 54, 1-20.
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Martinelli, M.J.1
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33
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0031986249
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The synthesis of the aldehyde was performed according to: a) M. J. Martinelli, J. Org. Chem. 1990, 55, 5065-5073; b) T. Oka, A. Murai, Tetrahedron 1998, 54, 1-20.
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Oka, T.1
Murai, A.2
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34
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0242392836
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note
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The possibility to recover the valuable ligand by column chromatography after aqueous work-up further adds to the efficiency of our process. Usually, at least 80 % of ligand could be recovered in pure form.
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36
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0000910413
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K. Takai, K. Sakogawa, Y. Kataoka, K. Oshima, K. Utimoto, Org. Synth. 1995, 72, 180-188.
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Takai, K.1
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Utimoto, K.5
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37
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0242476158
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note
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2 were added prior to the halide.
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