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(g) Wu, S.; Zhang, W.; Zhang, Z.; Zhang, X. Org. Lett. 2004, 6, 3565-3567.
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(j) Imamoto, T.; Crepy, K. V. L.; Katagiri, K. Tetrahedron: Asymmetry 2004, 15, 2213-2218.
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Imamoto, T.1
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(k) Cheng, X.; Zhang, Q.; Xie, J.-H.; Wang, L. X.; Zhou, Q. L. Angew. Chem., Int. Ed. 2005, 44, 1118-1121.
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(l) Pàmies, O.; Diéguez, M.; Claver, C. J. Am. Chem. Soc. 2005, 127, 3646-3647.
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(m) Takahashi, Y.; Yamamoto, Y.; Katagiri, K.; Danjo, H.; Yamaguchi, K.; Imamoto, T. J. Org. Chem. 2005, 70, 9009-9012.
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Takahashi, Y.1
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(o) Zhu, S. F.; Xie, J. B.; Zhang, Y. Z.; Li, S.; Zhou, Q. L. J. Am. Chem. Soc 2006, 128, 12886-12891.
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(p) Imamoto, T.; Yashio, K.; Crépy, K. V. L.; Katagiri, K.; Takahashi, H.; Kouchi, M.; Gridnev, I. D. Organometallics 2006, 25, 908-914.
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Imamoto, T.1
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Katagiri, K.4
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Gridnev, I.D.7
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20
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Imamoto, T.; Watanabe, J.; Wada, Y.; Masuda, H.; Yamada, H.; Tsuruta, H.; Matsukawa, S.; Yamaguchi, K. J. Am. Chem. Soc. 1998, 120, 1635-1636.
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Imamoto, T.1
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Yamaguchi, K.8
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22
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Gridnev, I. D.; Yamanoi, Y.; Higashi, N.; Tsuruta, H.; Yasutake, M.; Imamoto, T. Adv. Synth. Catal. 2001, 343, 118-136.
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Imamoto, T.; Sugita, K.; Yoshida, K. J. Am. Chem. Soc. 2005, 127, 11934-11935.
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Imamoto, T.1
Sugita, K.2
Yoshida, K.3
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24
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34548771185
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Both enantiomers of t-Bu-QuinoxP* are commercially available from Aldrich Chemical Company. Imamoto, T, Sugita, K, Yoshida, K. U.S. Patent 2007021610, 2007; Imamoto, T, Sugita, K, Yoshida, K. JP Patent, 2007056007, 2007
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Both enantiomers of t-Bu-QuinoxP* are commercially available from Aldrich Chemical Company. Imamoto, T.; Sugita, K.; Yoshida, K. U.S. Patent 2007021610, 2007; Imamoto, T.; Sugita, K.; Yoshida, K. JP Patent, 2007056007, 2007.
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25
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33645871855
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Imamoto, T.; Itoh, T.; Yamanoi, Y.; Narui, R.; Yoshida, K. Tetrahedron: Asymmetry 2006, 17, 560-565.
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Imamoto, T.1
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Yoshida, K.5
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28
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84891035198
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de Vries, J. G, Elsevier, C. J, Eds, Wiley-VCH: Weinheim, Germany
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Ohkuma, T.; Noyori, R. In Handbook of Homogeneous Hydrogenation; de Vries, J. G., Elsevier, C. J., Eds.; Wiley-VCH: Weinheim, Germany, 2007; Vol. 3, pp 1105-1163.
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Ohkuma, T.1
Noyori, R.2
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34548753391
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The unit cell contained two Pd complexes and two dichloromethane molecules. One of the Pd complexes and the dichloromethane molecules are omited in Figure 1 and Table 1; CCDC 649473 for the compounds contains supplementary crystallographic data. The data can be obtained free of charge via http://www.ccdc.cam.ac.uk/conts/retrieving.html (or from The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 IEZ, UK; fax: (+44) 1223-336-033; e-mail: deposit@ccdc.cam.ac.uk).
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The unit cell contained two Pd complexes and two dichloromethane molecules. One of the Pd complexes and the dichloromethane molecules are omited in Figure 1 and Table 1; CCDC 649473 for the compounds contains supplementary crystallographic data. The data can be obtained free of charge via http://www.ccdc.cam.ac.uk/conts/retrieving.html (or from The Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB2 IEZ, UK; fax: (+44) 1223-336-033; e-mail: deposit@ccdc.cam.ac.uk).
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(b) Ozawa, F.; Kubo, A.; Matsumoto, Y.; Hayashi, T. Organometallics 1993, 12, 4188-4196.
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Organometallics
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Ozawa, F.1
Kubo, A.2
Matsumoto, Y.3
Hayashi, T.4
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32
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34548765998
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It is known that C2-symmetric ligands are not so effective for Pd-catalyzed asymmetric allylic substitution as expected from their wide range of success in other catalytic asymmetric reactions; see ref 9
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2-symmetric ligands are not so effective for Pd-catalyzed asymmetric allylic substitution as expected from their wide range of success in other catalytic asymmetric reactions; see ref 9.
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26444603763
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Nemoto, T.; Masuda, T.; Akimoto, Y.; Fukuyama, T.; Hamada, Y. Org. Lett. 2005, 7, 4447-4450.
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Org. Lett
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Nemoto, T.1
Masuda, T.2
Akimoto, Y.3
Fukuyama, T.4
Hamada, Y.5
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34548789567
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Byproducts were observed only in the reaction of 3-oxo-3-arylpropionic acid ethyl esters having an electron-donating group on the aromatic ring. We found that the byproducts were formed by the reaction of produced alcohol 6 with EtOH in the presence of the t-Bu-QuinoxP*-Ru complex under the same conditions as those for the hydrogenation. Further, 6c also reacted with MeOH to give the 3-methoxy-3-(4′-methoxyphenyl)propionic acid ethyl ester. In the absence of hydrogen or Ru complex, no reaction occurred between 6c and alcohol.
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Byproducts were observed only in the reaction of 3-oxo-3-arylpropionic acid ethyl esters having an electron-donating group on the aromatic ring. We found that the byproducts were formed by the reaction of produced alcohol 6 with EtOH in the presence of the t-Bu-QuinoxP*-Ru complex under the same conditions as those for the hydrogenation. Further, 6c also reacted with MeOH to give the 3-methoxy-3-(4′-methoxyphenyl)propionic acid ethyl ester. In the absence of hydrogen or Ru complex, no reaction occurred between 6c and alcohol.
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0031562040
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It is noted that hydrogenation product 6g (99.8% ee) is the key intermediate for epinephrine. See: Singer, R. A.; Carreira, E. M. Tetrahedron Lett. 1997, 38, 927-930.
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It is noted that hydrogenation product 6g (99.8% ee) is the key intermediate for epinephrine. See: Singer, R. A.; Carreira, E. M. Tetrahedron Lett. 1997, 38, 927-930.
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36
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0023897616
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It is noted that hydrogenation product 6i (99.2% ee) is the key intermediate for carnitine. See: Kitamura, M.; Ohkuma, T.; Takaya, H.; Noyori, R. Tetrahedron Lett. 1988, 29, 1555-1556.
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It is noted that hydrogenation product 6i (99.2% ee) is the key intermediate for carnitine. See: Kitamura, M.; Ohkuma, T.; Takaya, H.; Noyori, R. Tetrahedron Lett. 1988, 29, 1555-1556.
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