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Imamoto, T.1
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For representative reviews, see: a
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For representative reviews, see: a) P.-H. Leung, Acc. Chem. Res. 2004, 37, 169-177;
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Leung, P.-H.1
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16
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84986379473
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c) T. Imamoto, T. Oshiki, T. Onozawa, M. Matsuo, T. Hikosaka, M. Yanagawa, Heteroat. Chem. 1992, 3, 563-575;
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Imamoto, T.1
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e) Y. Wada, T. Imamoto, H. Tsuruta, K. Yamaguchi, I. D. Gridnev, Adv. Synth. Catal. 2004, 346, 777-788;
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Wada, Y.1
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19
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24144436977
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T. Imamoto, K. Sugita, K. Yoshida, J. Am. Chem. Soc. 2005, 127, 11934-11935 (tBu-QuinoxP* = 2,3-bis(tert-butylmethylphosphanyl)quinoxaline).
-
f) T. Imamoto, K. Sugita, K. Yoshida, J. Am. Chem. Soc. 2005, 127, 11934-11935 (tBu-QuinoxP* = 2,3-bis(tert-butylmethylphosphanyl)quinoxaline).
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20
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0025152027
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Bauduin, C.1
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26
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K. Nagata, S. Matsukawa, T. Imamoto, J. Org. Chem. 2000, 65, 4185-4188.
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Nagata, K.1
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Imamoto, T.3
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27
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36549084571
-
-
The stereochemical course of the reaction was confirmed on the basis of the absolute configuration of the substitution product 3a. The absolute configuration of compound 6a, which is derived from 3a, was determined to be S,S by single-crystal X-ray analysis. Hence, 3a has the S configuration, which indicates that the substitution reaction occurred with inversion of configuration see the Supporting Information
-
The stereochemical course of the reaction was confirmed on the basis of the absolute configuration of the substitution product 3a. The absolute configuration of compound 6a, which is derived from 3a, was determined to be S,S by single-crystal X-ray analysis. Hence, 3a has the S configuration, which indicates that the substitution reaction occurred with inversion of configuration (see the Supporting Information).
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-
-
-
28
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0001538827
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R. M. Stoop, A. Mezzetti, F. Spindler, Organometallics 1998, 17, 668-675.
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Stoop, R.M.1
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Spindler, F.3
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29
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36549038591
-
-
The chlorinated compound (R)-(tert-butyl-(chloro)methylphosphanyl) borane was prepared by treating 1 with nBuLi and hexachloroethane. It exists as a stable crystalline solid and hardly reacted at all with benzylmagnesium chloride at room temperature.
-
The chlorinated compound (R)-(tert-butyl-(chloro)methylphosphanyl) borane was prepared by treating 1 with nBuLi and hexachloroethane. It exists as a stable crystalline solid and hardly reacted at all with benzylmagnesium chloride at room temperature.
-
-
-
-
30
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33845959705
-
-
Gold(I) complexes of triethynylphosphine ligands with bulky substituents at the alkyne termini show unique catalytic activity: A. Ochida, H. Ito, M. Sawamura, J. Am. Chem. Soc. 2006, 128, 16486-16487;
-
Gold(I) complexes of triethynylphosphine ligands with bulky substituents at the alkyne termini show unique catalytic activity: A. Ochida, H. Ito, M. Sawamura, J. Am. Chem. Soc. 2006, 128, 16486-16487;
-
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32
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0032564850
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a) T. Imamoto, J. Watanabe, Y. Wada, H. Masuda, H. Yamada, H. Tsuruta, S. Matsukawa, K. Yamaguchi, J. Am. Chem. Soc. 1998, 120, 1635-1636;
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Yamaguchi, K.8
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33
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b) I. D. Gridnev, Y. Yamanoi, N. Higashi, H. Tsuruta, M. Yasutake, T. Imamoto, Adv. Synth. Catal. 2001, 343, 118-136.
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Gridnev, I.D.1
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Imamoto, T.6
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34
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36549039532
-
-
To examine the possibility that the alkynyl group of these ligands could be hydrogenated under the reaction conditions, a 1:1 mixture of 5a and [Rh(nbd)2]BF4 in methanol was stirred under 1 atm of hydrogen pressure at room temperature for 3 h. The 1H NMR spectra of the reaction mixture were very complicated, and we could not clarify whether the alkynyl group was hydrogenated or not. On the other hand, 6a was recovered unchanged after being stirred as a solution in methanol in the presence of 5a/[Rh(nbd)2]BF4 5 mol, under 3 atm of hydrogen pressure at room temperature for 5 h
-
4 (5 mol%) under 3 atm of hydrogen pressure at room temperature for 5 h.
-
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35
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0032503611
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a) Y. Takaya, M. Ogasawara, T. Hayashi, M. Sakai, N. Miyaura, J. Am. Chem. Soc. 1998, 120, 5579-5580;
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0037042235
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b) T. Hayashi, M. Takahashi, Y. Takaya, M. Ogasawara, J. Am. Chem. Soc. 2002, 124, 5052-5058;
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c) T. Hayashi, K. Ueyama, N. Tokunaga, K. Yoshida, J. Am. Chem. Soc. 2003, 125, 11508-11509;
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40
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0037243669
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and references therein
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f) K. Fagnou, M. Lautens, Chem. Rev. 2003, 103, 169-196, and references therein.
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Fagnou, K.1
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-
41
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36549017046
-
-
The catalytic efficiency of the structurally analogous and electron-rich phosphine ligand tBu-BisP* was tested in the reaction of 2-cyclohexenone with phenylboronic acid under the same conditions as those described in Table 2. The reaction at 40°C for 2 h afforded the corresponding 1,4-addition product with 20% ee in 37% yield.
-
The catalytic efficiency of the structurally analogous and electron-rich phosphine ligand tBu-BisP* was tested in the reaction of 2-cyclohexenone with phenylboronic acid under the same conditions as those described in Table 2. The reaction at 40°C for 2 h afforded the corresponding 1,4-addition product with 20% ee in 37% yield.
-
-
-
-
42
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0034104304
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a) M. Lautens, J.-L. Renaud, S. Hiebert, J. Am. Chem. Soc. 2000, 122, 1804-1805;
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Angew1
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48
-
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34248519239
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Ad-QuinoxP*, 2,3-bis(adamantylmethylphosphanyl) quinoxaline
-
T. Imamoto, A. Kumada, K. Yoshida, Chem. Lett. 2007, 36, 500-501 (Ad-QuinoxP* = 2,3-bis(adamantylmethylphosphanyl) quinoxaline).
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Chem. Lett
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-
-
Imamoto, T.1
Kumada, A.2
Yoshida, K.3
-
49
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36549055101
-
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2(cod)]/tBu-BisP* (2 mol %) at room temperature for 6 h to give (1S,2S)-2-ethyl-1,2-dihydronaphthalen-1-ol in 93% yield with 94% ee.
-
2(cod)]/tBu-BisP* (2 mol %) at room temperature for 6 h to give (1S,2S)-2-ethyl-1,2-dihydronaphthalen-1-ol in 93% yield with 94% ee.
-
-
-
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