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Volumn 11, Issue 3, 2009, Pages 741-744

High ortho preference in Ni-catalyzed cross-coupling of halophenols with alkyl Grignard reagents

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EID: 62149102168     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol802824b     Document Type: Article
Times cited : (54)

References (35)
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    • 2nd ed, de Meijere, A, Diederich, F, Eds, Wiley-VCH: Weinheim
    • (a) Metal-Catalyzed Cross-Coupling Reactions, 2nd ed.; de Meijere, A., Diederich, F., Eds.; Wiley-VCH: Weinheim, 2004.
    • (2004) Metal-Catalyzed Cross-Coupling Reactions
  • 17
    • 13644268558 scopus 로고    scopus 로고
    • For reviews on site-selective cross-coupling of polyhalogenated heteroarenes, see: l
    • For reviews on site-selective cross-coupling of polyhalogenated heteroarenes, see: (l) Schröter, S.; Stock, C.; Bach, T. Tetrahedron 2005, 61, 2245.
    • (2005) Tetrahedron , vol.61 , pp. 2245
    • Schröter, S.1    Stock, C.2    Bach, T.3
  • 23
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    • Deprotonative orthometalation is frequently directed by an electron-donating group. See
    • Deprotonative orthometalation is frequently directed by an electron-donating group. See: Snieckus, V. Chem. Rev. 1999, 99, 879.
    • (1999) Chem. Rev , vol.99 , pp. 879
    • Snieckus, V.1
  • 26
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    • See the Supporting Information for experimental details
    • See the Supporting Information for experimental details.
  • 27
    • 62149085979 scopus 로고    scopus 로고
    • 2, and -NHAc resulted in poor yields and ratios of the desired ortho-substituted and the disubstituted products. The yields of the desired ortho-substituted products (and the disubstituted products in parenthesis): 2,4-dichlorobenzyl alcohol, 6% (28%); 2,4-dichloroaniline, 19% (8%); 2,4-dichloroacetanilide, trace (13%).
    • 2, and -NHAc resulted in poor yields and ratios of the desired ortho-substituted and the disubstituted products. The yields of the desired ortho-substituted products (and the disubstituted products in parenthesis): 2,4-dichlorobenzyl alcohol, 6% (28%); 2,4-dichloroaniline, 19% (8%); 2,4-dichloroacetanilide, trace (13%).
  • 28
    • 0037620634 scopus 로고    scopus 로고
    • Reversal of the reactivity order of halo groups in transition-metal- catalyzed cross-coupling has been reported. See: (a) Terao, J, Ikumi, A, Kuniyasu, H, Kambe, N. J. Am. Chem. Soc. 2003, 125, 5646
    • Reversal of the reactivity order of halo groups in transition-metal- catalyzed cross-coupling has been reported. See: (a) Terao, J.; Ikumi, A.; Kuniyasu, H.; Kambe, N. J. Am. Chem. Soc. 2003, 125, 5646.
  • 29
    • 51949103726 scopus 로고    scopus 로고
    • Arisawa, M.; Suzuki, T.; Ishikawa, T.; Yamaguchi, M. J. Am. Chem. Soc. 2008,130, 12214. See also ref 3d,g,j.
    • (b) Arisawa, M.; Suzuki, T.; Ishikawa, T.; Yamaguchi, M. J. Am. Chem. Soc. 2008,130, 12214. See also ref 3d,g,j.
  • 30
    • 36849016329 scopus 로고    scopus 로고
    • For a Pd-catalyzed competitive reaction, see
    • For a Pd-catalyzed competitive reaction, see: Ishikawa, S.; Manabe, K. Chem. Lett. 2007, 36, 1302.
    • (2007) Chem. Lett , vol.36 , pp. 1302
    • Ishikawa, S.1    Manabe, K.2
  • 31
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    • Activation of C-X bonds by coordination to Mg has been reported. See: a
    • Activation of C-X bonds by coordination to Mg has been reported. See: (a) Yoshikai, N.; Mashima, H.; Nakamura, E. J. Am. Chem. Soc. 2005, 127, 17978.
    • (2005) J. Am. Chem. Soc , vol.127 , pp. 17978
    • Yoshikai, N.1    Mashima, H.2    Nakamura, E.3
  • 32
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    • Saeki, T.; Takashima, Y.; Tamao, K. Synlett 2005, 1771 See also.
    • (b) Saeki, T.; Takashima, Y.; Tamao, K. Synlett 2005, 1771 See also.
  • 34
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    • One of the reviewers of this paper suggested possibilities of S NAr and radical mechanisms instead of concerted oxidative addition of C-X bond to Ni0, We cannot completely exclude these possibilities, although the SNAr mechanism is unlikely because of the presence of the strongly electron-donating oxido group. We thank the reviewer for pointing out these possibilities
    • NAr mechanism is unlikely because of the presence of the strongly electron-donating oxido group. We thank the reviewer for pointing out these possibilities.


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