메뉴 건너뛰기




Volumn 65, Issue 16, 2009, Pages 3211-3221

Palladium (II/IV) catalyzed cyclopropanation reactions: scope and mechanism

Author keywords

[No Author keywords available]

Indexed keywords

ALKENE; CARBON; CYCLOPROPANE DERIVATIVE; GOLD; KETONE DERIVATIVE; PALLADIUM; PLATINUM;

EID: 62049085617     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2008.10.107     Document Type: Article
Times cited : (58)

References (76)
  • 14
    • 62049083619 scopus 로고    scopus 로고
    • For reviews on cycloisomerizations, see
    • For reviews on cycloisomerizations, see:
  • 18
    • 62049083936 scopus 로고    scopus 로고
    • Intramolecular cyclization of diazo compounds has also frequently been used to access bicyclo[3.1.0] and [4.1.0] ring systems. For examples, see:
    • Intramolecular cyclization of diazo compounds has also frequently been used to access bicyclo[3.1.0] and [4.1.0] ring systems. For examples, see:
  • 23
    • 62049085772 scopus 로고    scopus 로고
    • For examples, see
    • For examples, see:
  • 36
    • 62049083230 scopus 로고    scopus 로고
    • For a preliminary account of this work, see
    • For a preliminary account of this work, see:
  • 42
    • 62049084885 scopus 로고    scopus 로고
    • For examples, see
    • For examples, see:
  • 49
    • 62049084043 scopus 로고    scopus 로고
    • For examples, see
    • For examples, see:
  • 55
    • 0003625966 scopus 로고
    • Hegedus L.S., Abel E.W., Stone F.G.A., and Wilkinson G. (Eds), Pergamon, Oxford pp 259-287
    • Soderberg B.C. In: Hegedus L.S., Abel E.W., Stone F.G.A., and Wilkinson G. (Eds). Comprehensive Organometallic Chemistry II Vol. 12 (1995), Pergamon, Oxford pp 259-287
    • (1995) Comprehensive Organometallic Chemistry II , vol.12
    • Soderberg, B.C.1
  • 56
    • 62049085199 scopus 로고    scopus 로고
    • For examples, see
    • For examples, see:
  • 63
    • 62049085724 scopus 로고    scopus 로고
    • note
    • The olefin geometry of these side products could not be definitively determined using NOE analysis.
  • 67
    • 62049084528 scopus 로고    scopus 로고
    • note
    • Reductive elimination from a similar intermediate has been reported to proceed with inversion, as determined by coupling constant analysis (see Ref. 11b).
  • 68
    • 62049085806 scopus 로고    scopus 로고
    • The olefin geometry of 39c could not be definitively determined in solution via NOE analysis; however, interestingly, the X-ray structure shows a geometry consistent with initial cis-acetoxypalladation of the alkyne. While the literature suggests that trans-acetoxypalladation should predominate under our standard reaction conditions, early studies of alkyne halo- and acetoxypalladation have shown that mixtures of trans and cis products can be formed. For examples, see:
    • The olefin geometry of 39c could not be definitively determined in solution via NOE analysis; however, interestingly, the X-ray structure shows a geometry consistent with initial cis-acetoxypalladation of the alkyne. While the literature suggests that trans-acetoxypalladation should predominate under our standard reaction conditions, early studies of alkyne halo- and acetoxypalladation have shown that mixtures of trans and cis products can be formed. For examples, see:
  • 73
    • 0001698683 scopus 로고
    • Further investigations are underway to understand the factors controlling cis versus trans acetoxypalladation as well as the effect that this has on the outcome of these cyclopropane-forming transformations
    • Bäckvall J.-E., Nilsson Y.I.M., and Gatti R.G.P. Organometallics 14 (1995) 4242 Further investigations are underway to understand the factors controlling cis versus trans acetoxypalladation as well as the effect that this has on the outcome of these cyclopropane-forming transformations
    • (1995) Organometallics , vol.14 , pp. 4242
    • Bäckvall, J.-E.1    Nilsson, Y.I.M.2    Gatti, R.G.P.3
  • 74
    • 62049083528 scopus 로고    scopus 로고
    • note
    • Crystallographic data (excluding structure factors) for the structures in this paper have been deposited with the Cambridge Crystallographic Data Centre as supplementary publication number CCDC 704193. Copies of the data can be obtained, free of charge, on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax: +44 (0) 1223 336033 or e-mail: deposit@ccdc.cam.ac.uk).
  • 75
    • 62049085486 scopus 로고    scopus 로고
    • note
    • Kinetics studies have shown that these reactions are zero order in oxidant. Therefore, the change in rate with electronically differentiated alkenes does not provide information about the cyclopropane-forming step of this reaction.
  • 76
    • 62049084100 scopus 로고    scopus 로고
    • note
    • In contrast, significant decomposition of the alkene products (β-H) was observed under these conditions. Many small peaks were observed in the GC and HPLC traces of these reactions after 8 h, suggesting that β-H decomposes to a mixture of unidentified minor products. We believe that this accounts for the poor mass balance in many of these reactions.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.