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Volumn 75, Issue 8, 2010, Pages 2726-2729

Copper-catalyzed amination of primary benzylic C?H bonds with primary and secondary sulfonamides

Author keywords

[No Author keywords available]

Indexed keywords

BENZYLIC; FUNCTIONALIZATIONS; H-BONDS; ROOM TEMPERATURE;

EID: 77950970848     PISSN: 00223263     EISSN: 15206904     Source Type: Journal    
DOI: 10.1021/jo100197r     Document Type: Article
Times cited : (112)

References (93)
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    • For some recent reviews of C?H bond oxidations, including aminations, see: Collet, F.; Dodd, R. H.; Dauban, P. Chem. Commun. 2009, 5061-5074
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    • For some recent reviews of metal-nitrene based aminations, see
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    • Representative intermolecular metal-nitrene based aminations
    • Representative intermolecular metal-nitrene based aminations: Lu, H.; Subbarayan, V.; Tao, J.; Zhang, X. P. Organometallics 2010, 29, 389-393
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    • Metal-peroxycarbamate and perester based C?H aminations: Zhang, Y.; Fu, H.; Jiang, Y.; Zhao, Y. Org. Lett. 2007, 9, 3813-3816
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    • Palladium-catalyzed allylic C?H aminations: Rice, G. T.; White, M. C. J. Am. Chem. Soc. 2009, 131, 11707-11711
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    • Other representative saturated C?H bond amination strategies
    • Other representative saturated C?H bond amination strategies: Allen, C. P.; Benkovics, T.; Turek, A. K.; Yoon, T. P. J. Am. Chem. Soc. 2009, 131, 12560-12561
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    • Some of the increased challenge associated with oxidations of primary over secondary benzylic C?H bonds may be attributable to differences in bond-dissociation energies between these types of substrates, see refs 4b, 4n
    • Some of the increased challenge associated with oxidations of primary over secondary benzylic C?H bonds may be attributable to differences in bond-dissociation energies between these types of substrates, see refs 4b, 4n, and Bryant, J. R.; Mayer, J. M. J. Am. Chem. Soc. 2003, 125, 10351-10361
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    • The amination of toluene with a variety of transition metal catalysts are reported to proceed in 9?30% yields even when toluene is used in large excess as the solvent. See Supporting Information for further details
    • The amination of toluene with a variety of transition metal catalysts are reported to proceed in 9?30% yields even when toluene is used in large excess as the solvent. See Supporting Information for further details.
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    • 2 yielded <5% of the amination product
    • 2 yielded <5% of the amination product.
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    • For some representative examples, see
    • For some representative examples, see: Xia, N.; Taillefer, M. Angew. Chem., Int. Ed. 2009, 48, 337-339
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    • Note
    • These oxidants could readily be synthesized in gram quantities in a single step, commencing from commercially available reagents. See Supporting Information for further details.
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    • Note
    • 1H NMR analysis of the unpurified reaction mixture.
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    • Note
    • Br3Cu(NCMe) catalyst with PhI - NTs; see ref 4k. In contrast, a Rh-catalyst/sulfonimidamide system observed amination exclusively at the secondary carbon; see ref 4e.
  • 83
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    • Note
    • For a discussion of C?H bond reactivity and steric effects in Rh-nitrene aminations, see ref 4j. With Cu-nitrene aminations, see refs 4e, 4h, 4k.
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    • For leading reviews and references on the Kharasch?Sosnovsky reaction, see
    • For leading reviews and references on the Kharasch?Sosnovsky reaction, see: Andrus, M. B.; Lashley, J. C. Tetrahedron 2002, 58, 845-866
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    • Note
    • 1H NMR spectrum of the unpurified reaction mixture.
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    • Note
    • Alternatively, carbon?nitrogen bond formation may proceed from an Cu(III) species. Aminations that proceed via aryl-Cu(III)-N species have recently been described, and Cu(III) intermediates have been proposed in other Cu-catalyzed allylic aminations; see refs 5a, 5c, and Huffman, L. M.; Stahl, S. S. J. Am. Chem. Soc. 2008, 130, 9196-9197
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    • For recent examples of aminations which proceed via postulated carbocations, see
    • For recent examples of aminations which proceed via postulated carbocations, see: Qin, H.; Yamagiwa, N.; Matsunaga, S.; Shibasaki, M. Angew. Chem., Int. Ed. 2007, 46, 409-413
    • (2007) Angew. Chem., Int. Ed. , vol.46 , pp. 409-413
    • Qin, H.1    Yamagiwa, N.2    Matsunaga, S.3    Shibasaki, M.4


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