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1
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0034712186
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Asymmetric Pauson-Khand-type reactions catalyzed by Co: (a) Hiroi, K.; Watanabe, T.; Kawagishi, R.; Abe, I. Tetrahedron: Asymmetry 2000, 11, 797-808. (b) Sturla, S. J.; Buchwald, S. L. J. Org. Chem. 2002, 67, 3398-3403. Ti: (c) Hicks, F. A.; Buchwald, S. L. J. Am. Chem. Soc. 1999, 121, 7026-7033. Rh: (d) Jeong, N.; Sung, B. K.; Choi, Y. K. J. Am. Chem. Soc. 2000, 122, 6771-6772. (e) Shibata, T.; Toshida, N.; Takagi, K. J. Org. Chem. 2002, 67, 7446-7450. Ir: (f) Shibata, T.; Takagi, K. J. Am. Chem. Soc. 2000, 122, 9852-9853. For examples of asymmetric Pauson-Khand reaction using chiral auxiliaries, see: (g) Rivero, M. R.; de la Rosa, J. C.; Carretero, J. C. J. Am. Chem. Soc. 2003, 125, 14992 and references therein.
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Hiroi, K.1
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Abe, I.4
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2
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0037123424
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Asymmetric Pauson-Khand-type reactions catalyzed by Co: (a) Hiroi, K.; Watanabe, T.; Kawagishi, R.; Abe, I. Tetrahedron: Asymmetry 2000, 11, 797-808. (b) Sturla, S. J.; Buchwald, S. L. J. Org. Chem. 2002, 67, 3398-3403. Ti: (c) Hicks, F. A.; Buchwald, S. L. J. Am. Chem. Soc. 1999, 121, 7026-7033. Rh: (d) Jeong, N.; Sung, B. K.; Choi, Y. K. J. Am. Chem. Soc. 2000, 122, 6771-6772. (e) Shibata, T.; Toshida, N.; Takagi, K. J. Org. Chem. 2002, 67, 7446-7450. Ir: (f) Shibata, T.; Takagi, K. J. Am. Chem. Soc. 2000, 122, 9852-9853. For examples of asymmetric Pauson-Khand reaction using chiral auxiliaries, see: (g) Rivero, M. R.; de la Rosa, J. C.; Carretero, J. C. J. Am. Chem. Soc. 2003, 125, 14992 and references therein.
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Sturla, S.J.1
Buchwald, S.L.2
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3
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0033523215
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Asymmetric Pauson-Khand-type reactions catalyzed by Co: (a) Hiroi, K.; Watanabe, T.; Kawagishi, R.; Abe, I. Tetrahedron: Asymmetry 2000, 11, 797-808. (b) Sturla, S. J.; Buchwald, S. L. J. Org. Chem. 2002, 67, 3398-3403. Ti: (c) Hicks, F. A.; Buchwald, S. L. J. Am. Chem. Soc. 1999, 121, 7026-7033. Rh: (d) Jeong, N.; Sung, B. K.; Choi, Y. K. J. Am. Chem. Soc. 2000, 122, 6771-6772. (e) Shibata, T.; Toshida, N.; Takagi, K. J. Org. Chem. 2002, 67, 7446-7450. Ir: (f) Shibata, T.; Takagi, K. J. Am. Chem. Soc. 2000, 122, 9852-9853. For examples of asymmetric Pauson-Khand reaction using chiral auxiliaries, see: (g) Rivero, M. R.; de la Rosa, J. C.; Carretero, J. C. J. Am. Chem. Soc. 2003, 125, 14992 and references therein.
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Hicks, F.A.1
Buchwald, S.L.2
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4
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0343953463
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Asymmetric Pauson-Khand-type reactions catalyzed by Co: (a) Hiroi, K.; Watanabe, T.; Kawagishi, R.; Abe, I. Tetrahedron: Asymmetry 2000, 11, 797-808. (b) Sturla, S. J.; Buchwald, S. L. J. Org. Chem. 2002, 67, 3398-3403. Ti: (c) Hicks, F. A.; Buchwald, S. L. J. Am. Chem. Soc. 1999, 121, 7026-7033. Rh: (d) Jeong, N.; Sung, B. K.; Choi, Y. K. J. Am. Chem. Soc. 2000, 122, 6771-6772. (e) Shibata, T.; Toshida, N.; Takagi, K. J. Org. Chem. 2002, 67, 7446-7450. Ir: (f) Shibata, T.; Takagi, K. J. Am. Chem. Soc. 2000, 122, 9852-9853. For examples of asymmetric Pauson-Khand reaction using chiral auxiliaries, see: (g) Rivero, M. R.; de la Rosa, J. C.; Carretero, J. C. J. Am. Chem. Soc. 2003, 125, 14992 and references therein.
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Jeong, N.1
Sung, B.K.2
Choi, Y.K.3
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5
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0037131281
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Asymmetric Pauson-Khand-type reactions catalyzed by Co: (a) Hiroi, K.; Watanabe, T.; Kawagishi, R.; Abe, I. Tetrahedron: Asymmetry 2000, 11, 797-808. (b) Sturla, S. J.; Buchwald, S. L. J. Org. Chem. 2002, 67, 3398-3403. Ti: (c) Hicks, F. A.; Buchwald, S. L. J. Am. Chem. Soc. 1999, 121, 7026-7033. Rh: (d) Jeong, N.; Sung, B. K.; Choi, Y. K. J. Am. Chem. Soc. 2000, 122, 6771-6772. (e) Shibata, T.; Toshida, N.; Takagi, K. J. Org. Chem. 2002, 67, 7446-7450. Ir: (f) Shibata, T.; Takagi, K. J. Am. Chem. Soc. 2000, 122, 9852-9853. For examples of asymmetric Pauson-Khand reaction using chiral auxiliaries, see: (g) Rivero, M. R.; de la Rosa, J. C.; Carretero, J. C. J. Am. Chem. Soc. 2003, 125, 14992 and references therein.
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(2002)
J. Org. Chem.
, vol.67
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Shibata, T.1
Toshida, N.2
Takagi, K.3
-
6
-
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0034638410
-
-
Asymmetric Pauson-Khand-type reactions catalyzed by Co: (a) Hiroi, K.; Watanabe, T.; Kawagishi, R.; Abe, I. Tetrahedron: Asymmetry 2000, 11, 797-808. (b) Sturla, S. J.; Buchwald, S. L. J. Org. Chem. 2002, 67, 3398-3403. Ti: (c) Hicks, F. A.; Buchwald, S. L. J. Am. Chem. Soc. 1999, 121, 7026-7033. Rh: (d) Jeong, N.; Sung, B. K.; Choi, Y. K. J. Am. Chem. Soc. 2000, 122, 6771-6772. (e) Shibata, T.; Toshida, N.; Takagi, K. J. Org. Chem. 2002, 67, 7446-7450. Ir: (f) Shibata, T.; Takagi, K. J. Am. Chem. Soc. 2000, 122, 9852-9853. For examples of asymmetric Pauson-Khand reaction using chiral auxiliaries, see: (g) Rivero, M. R.; de la Rosa, J. C.; Carretero, J. C. J. Am. Chem. Soc. 2003, 125, 14992 and references therein.
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(2000)
J. Am. Chem. Soc.
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, pp. 9852-9853
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Shibata, T.1
Takagi, K.2
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7
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0344236126
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and references therein
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Asymmetric Pauson-Khand-type reactions catalyzed by Co: (a) Hiroi, K.; Watanabe, T.; Kawagishi, R.; Abe, I. Tetrahedron: Asymmetry 2000, 11, 797-808. (b) Sturla, S. J.; Buchwald, S. L. J. Org. Chem. 2002, 67, 3398-3403. Ti: (c) Hicks, F. A.; Buchwald, S. L. J. Am. Chem. Soc. 1999, 121, 7026-7033. Rh: (d) Jeong, N.; Sung, B. K.; Choi, Y. K. J. Am. Chem. Soc. 2000, 122, 6771-6772. (e) Shibata, T.; Toshida, N.; Takagi, K. J. Org. Chem. 2002, 67, 7446-7450. Ir: (f) Shibata, T.; Takagi, K. J. Am. Chem. Soc. 2000, 122, 9852-9853. For examples of asymmetric Pauson-Khand reaction using chiral auxiliaries, see: (g) Rivero, M. R.; de la Rosa, J. C.; Carretero, J. C. J. Am. Chem. Soc. 2003, 125, 14992 and references therein.
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J. Am. Chem. Soc.
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Rivero, M.R.1
De La Rosa, J.C.2
Carretero, J.C.3
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8
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3543126652
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For catalytic asymmetric Nazarov cyclizations, see: (a) Liang, G.; Trauner, D. J. Am. Chem. Soc. 2004, 126, 9544. (b) Aggarwal, V. K.; Belfield, A. J. Org. Lett. 2003, 5, 5075. For asymmetric Nazarov cyclizations of chiral allenes, see: (c) Tius, M. A. Acc. Chem. Res. 2003, 36, 284.
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Liang, G.1
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9
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0346656521
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For catalytic asymmetric Nazarov cyclizations, see: (a) Liang, G.; Trauner, D. J. Am. Chem. Soc. 2004, 126, 9544. (b) Aggarwal, V. K.; Belfield, A. J. Org. Lett. 2003, 5, 5075. For asymmetric Nazarov cyclizations of chiral allenes, see: (c) Tius, M. A. Acc. Chem. Res. 2003, 36, 284.
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Aggarwal, V.K.1
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For catalytic asymmetric Nazarov cyclizations, see: (a) Liang, G.; Trauner, D. J. Am. Chem. Soc. 2004, 126, 9544. (b) Aggarwal, V. K.; Belfield, A. J. Org. Lett. 2003, 5, 5075. For asymmetric Nazarov cyclizations of chiral allenes, see: (c) Tius, M. A. Acc. Chem. Res. 2003, 36, 284.
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Tius, M.A.1
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For alternative asymmetric syntheses of cyclopentenones, see: (a) Tanaka, K.; Fu, G. C. J. Am. Chem. Soc. 2002, 124, 10296. (b) Barluenga, J.; Tomás, M.; Ballesteros, A.; Santamaría, J.; Brillet, C.; Garía-Granda, S.; Piñera-Nicolás, A.; Vázquez, J. T. J. Am. Chem. Soc. 1999, 121, 4516.
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(a) Mainetti, E.; Mouriés, V.; Fensterbank, L.; Malacria, M.; Marco-Contelles, J. Angew. Chem., Int. Ed. 2002, 41, 2132.
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17744399275
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note
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2 (100% 4, 0% 5), CuBr (100% 4, 0% 5).
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27
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33847087351
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Enantioenriched propargyl alcohols were prepared by reduction of the corresponding ketone with R-Alpine-Borane and the absolute stereo-chemistry assigned according to Midland, M. M.; McDowell, D. C.; Hatch, R. L.; Tramontano, A. J. Am. Chem. Soc. 1980, 102, 867.
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33845375136
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note
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3)). Hua, D. H. J. Am. Chem. Soc. 1986, 108, 3835. The stereochemistry of the remaining cyclopentenones was assigned by analogy.
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29
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17744365918
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note
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This transition state also accounts for the observation that rearrangement of a 1:2 mixture of Z:E olefin isomers (34) returned the Z-isomer unreacted. Cyclization of the Z-isomer would require that the olefin substituent come into close proximity to the vinyl gold. (Chemical Equation Presented)
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-
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30
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17744390329
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note
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In accord with this proposed intermediate, diene 37 was isolated from cycloisomerization of 36. (Chemical Equation Presented)
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