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Volumn 5, Issue 6, 2010, Pages 1475-1486

Heck-type reactions of imine derivatives: A DFT study

Author keywords

Density functional theory; Heck coupling; Inline; Mechanism; Palladium

Indexed keywords

ACTIVATION BARRIERS; ARYL HALIDES; C-H ACTIVATION; CATALYTIC CYCLES; CONTINUUM SOLVATION MODELS; DENSITY-FUNCTIONAL METHODS; DFT STUDY; DOUBLE BONDS; HECK COUPLING; HECK-TYPE COUPLING; IMINE DERIVATIVES; IN-LINE; MIGRATORY INSERTION; OXIDATIVE ADDITIONS; RATE DETERMINING STEP;

EID: 77952905785     PISSN: 18614728     EISSN: 1861471X     Source Type: Journal    
DOI: 10.1002/asia.200900744     Document Type: Article
Times cited : (28)

References (130)
  • 54
  • 72
    • 33644944460 scopus 로고    scopus 로고
    • Thus we consider the free energy difference between the rate determining transition state and the lowest intermediate before it as the "apparent activation barrier". When comparing several possible pathways, the pathway with lowest apparent activation barrier is considered to be preferred
    • The terminology "apparent activation barrier" is used instead of "activation barrier" to avoid ambiguity. In a reaction pathway that has several elementary steps, the transition state that has the highest activation barrier is the rate determining step. The intermediates before the rate determining transition state are all in fast equilibrium (see S. Kozuch, S. Shaik, J. Am. Chem. Soc. 2006, 128, 3355). Thus we consider the free energy difference between the rate determining transition state and the lowest intermediate before it as the "apparent activation barrier". When comparing several possible pathways, the pathway with lowest apparent activation barrier is considered to be preferred.
    • (2006) J. Am. Chem. Soc. , vol.128 , pp. 3355
    • Kozuch, S.1    Shaik, S.2
  • 78
    • 77952918657 scopus 로고    scopus 로고
    • 3 ligand trans to the aryl groups. Nonetheless, they do not enter the catalytic cycle; see Figure S1 in the Supporting Information
    • 3 ligand trans to the aryl groups. Nonetheless, they do not enter the catalytic cycle; see Figure S1 in the Supporting Information.
  • 88
    • 33644525016 scopus 로고    scopus 로고
    • Lin et al. previously showed that the barrier for the â-H elimination of a related cationic Pd complex was also fairly low, see: H. Zhao, A. Ariafard, Z.-Y. Lin, Organometallics 2006, 25, 812.
    • (2006) Organometallics , vol.25 , pp. 812
    • Zhao, H.1    Ariafard, A.2    Lin, Z.-Y.3
  • 109
    • 0030767352 scopus 로고    scopus 로고
    • Note that the Heck coupling of electron-rich olefins has a regioselectivity problem between α and β positions of the olefin. With the emphasis on the difference between imine and olefin, we only discuss the pathway leads to the â-substituted olefin. For experimental studies, see: a) W. A. Herrmann, C. Brossmer, C. P. Reisinger, T. H. Reisinger, K. Ofele, M. Beller, Chem. Eur. J. 1997, 3, 1357;
    • (1997) Chem. Eur. J. , vol.3 , pp. 1357
    • Herrmann, W.A.1    Brossmer, C.2    Reisinger, C.P.3    Reisinger, T.H.4    Ofele, K.5    Beller, M.6
  • 115
    • 77952942492 scopus 로고    scopus 로고
    • note
    • -1, respectively.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.