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Volumn 5, Issue 4, 2010, Pages 841-846

Modified [(IPr)Pd(R-acac)Cl] complexes: Influence of the acac substitution on the catalytic activity in aryl amination

Author keywords

Activation; Amination; Cross coupling; N heterocyclic carbenes; Palladium

Indexed keywords

ACTIVATION MECHANISMS; ACTIVATION RATES; ARYL AMINATION REACTION; ARYLAMINATION; CATALYTIC ACTIVITY; CATALYTIC RESULTS; COMPARATIVE STUDIES; CROSS-COUPLING; CROSS-COUPLINGS; IMIDAZOL; N-HETEROCYCLIC CARBENES; PRECATALYSTS; SPECTROSCOPIC CHARACTERIZATION; STERIC BULK; STRONG CORRELATION; X-RAY STUDIES;

EID: 77950839860     PISSN: 18614728     EISSN: 1861471X     Source Type: Journal    
DOI: 10.1002/asia.200900654     Document Type: Article
Times cited : (27)

References (55)
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    • Navarro and co-workers recently reported the synthesis of [(SIPr) Pd (acac) Cl], which proved to be more active in cross-coupling than 4; see: O. H. Winkelmann, A. Riekstins, S. P. Nolan, O. Navarro, Organomet al.lics 2009, 28, 5809-5813.
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    • 2] complexes have been investigated only scarcely as palladium sources for homogeneous catalysis. For selected recent examples, see: a) V. H. Purecha, N. S. Nandurkar, B. M. Bhanage, J. M. Nagarkar, Tetrahedron Lett. 2008, 49, 5252-5254;
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    • dbm = dibenzoylmethanato; bac = benzoylacetonato; tmhd = tetramethylheptanedionato; hfac = hexafluoroacetylacetonato
    • dbm = dibenzoylmethanato; bac = benzoylacetonato; tmhd = tetramethylheptanedionato; hfac = hexafluoroacetylacetonato.
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    • Despite repeated attempts we were unable to obtain suitable crystals for X-ray analysis of 8
    • Despite repeated attempts we were unable to obtain suitable crystals for X-ray analysis of 8.
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    • This is in sharp contrast with the observation by Cavell and coworkers that [(IDM) Pd (tfac) Me] (IDM = 1, 3-dimethylimidazol-2-ylidene, tfac = trifluoroacetylacetonato) and [(IDM) Pd (hfac) Me] are active precatalysts for the Heck reaction; see reference [15c]
    • This is in sharp contrast with the observation by Cavell and coworkers that [(IDM) Pd (tfac) Me] (IDM = 1, 3-dimethylimidazol-2-ylidene, tfac = trifluoroacetylacetonato) and [(IDM) Pd (hfac) Me] are active precatalysts for the Heck reaction; see reference [15c].
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    • Such a short catalyst life could be the consequence of high concentration of bare monoligated palladium (0) species, which will aggregate and precipitate. We are currently investigating, among others, this hypothesis
    • Such a short catalyst life could be the consequence of high concentration of bare monoligated palladium (0) species, which will aggregate and precipitate. We are currently investigating, among others, this hypothesis.
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    • 0] (m/z 494.2)
    • 0] (m/z 494.2) ;


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.