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Volumn 132, Issue 6, 2010, Pages 2050-2057

Origins of regioselectivity and alkene-directing effects in nickel-catalyzed reductive couplings of alkynes and aldehydes

Author keywords

[No Author keywords available]

Indexed keywords

ALKENYL; ALKYNYL GROUPS; C-C BONDS; CARBONYL COMPLEXES; CONJUGATED ENYNES; DENSITY-FUNCTIONAL CALCULATIONS; REDUCTIVE COUPLING REACTION; REDUCTIVE COUPLINGS; STERIC EFFECT;

EID: 77249109340     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja909562y     Document Type: Article
Times cited : (106)

References (89)
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    • The first nickel-catalyzed intermolecular alkylative couplings of alkynes and aldehydes were reported in 1997: Oblinger, E.; Montgomery, J. J. Am. Chem. Soc. 1997, 119, 9065.
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    • For Ni-catalyzed intermolecular coupling reactions with enynes and carbonyl compounds, see: a
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    • For examples of Zr-catalyzed coupling reactions with 1,3-enynes, see: (a) Takahashi, T, Xi, Z, Nishihara, Y, Huo, S, Kasai, K, Aoyagi, K, Denisov, V, Negishi, E. Tetrahedron 1997, 53, 9123
    • For examples of Zr-catalyzed coupling reactions with 1,3-enynes, see: (a) Takahashi, T.; Xi, Z.; Nishihara, Y.; Huo, S.; Kasai, K.; Aoyagi, K.; Denisov, V.; Negishi, E. Tetrahedron 1997, 53, 9123.
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    • For examples of alkenedirecting effects in metal-catalyzed reactions, see: Pd, For a review of alkene-directing effects, see: a
    • For a review of alkene-directing effects, see: (a) Johnson, J. B.; Rovis, T. Angew. Chem., Int. Ed. 2008, 47, 840. For examples of alkenedirecting effects in metal-catalyzed reactions, see: Pd,
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    • For a theoretical study on the mechanism of Ni-catalyzed alkyneenone reductive coupling reactions with ZnMe2 reductant in a ligand-free system, see: Hratchian, H. P, Chowdhury, S. K, Gutierrez-Garcia, V. M, Amarasinghe, K. K. D, Heeg, M. J, Schlegel, H. B, Montgomery, J. Organometallics 2004, 23, 4636
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    • The oxametallacyclopentene intermediate has been observed in the stoichiometric alkyne - aldehyde coupling reaction: Ogoshi, S.; Arai, T.; Ohashi, M.; Kurosawa, H. Chem. Commun. 2008, 1347.
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    • It has been proposed that nickel-catalyzed couplings of 1,3-dienes and aldehyde or ketone occur via η3-allylalkoxynickel intermediates: (a) Sato, Y, Takimoto, M, Hayashi, K, Katsuhara, T, Takagi, K, Mori, M. J. Am. Chem. Soc. 1994, 116, 9771
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    • In contrast, Ru-catalyzed coupling of 1,3-enyne and alcohol occurs at the vinylic terminus of the enyne: Patman, R. L.; Williams, V. M.; Bower, J. F.; Krische, M. J. Angew. Chem., Int. Ed. 2008, 47, 5220.
    • In contrast, Ru-catalyzed coupling of 1,3-enyne and alcohol occurs at the vinylic terminus of the enyne: Patman, R. L.; Williams, V. M.; Bower, J. F.; Krische, M. J. Angew. Chem., Int. Ed. 2008, 47, 5220.
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    • Similar directing effects of 1,3-diynes were observed in transitionmetal-catalyzed coupling reactions; the alkynyl groups prefer to be distal to the forming C-C bond. For examples, see: Rh, (a) Rourke, J. P.; Batsanov, A. S.; Howard, J. A. K.; Marder, T. B. Chem. Commun. 2001, 2626.
    • Similar directing effects of 1,3-diynes were observed in transitionmetal-catalyzed coupling reactions; the alkynyl groups prefer to be distal to the forming C-C bond. For examples, see: Rh, (a) Rourke, J. P.; Batsanov, A. S.; Howard, J. A. K.; Marder, T. B. Chem. Commun. 2001, 2626.
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    • 3-oxaallylnickel moiety was suggested to stabilize the oxidative addition transition state, leading to formation of a C-C bond at the β position of the enone. For examples of Ni-catalyzed couplings with enones, see: (a) Ikeda, S.; Sato, Y. J. Am. Chem. Soc. 1994, 116, 5975.
    • 3-oxaallylnickel moiety was suggested to stabilize the oxidative addition transition state, leading to formation of a C-C bond at the β position of the enone. For examples of Ni-catalyzed couplings with enones, see: (a) Ikeda, S.; Sato, Y. J. Am. Chem. Soc. 1994, 116, 5975.


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