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Volumn 127, Issue 29, 2005, Pages 10323-10333

On the mechanism of the palladium(II)-catalyzed decarboxylative olefination of arene carboxylic acids. Crystallographic characterization of non-phosphine palladium(II) intermediates and observation of their stepwise transformation in Heck-like processes

Author keywords

[No Author keywords available]

Indexed keywords

CARBOXYLIC ACIDS; CATALYSIS; CHARACTERIZATION; CRYSTALLOGRAPHY; OLEFINS; REACTION KINETICS;

EID: 22944483170     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja052099l     Document Type: Article
Times cited : (418)

References (45)
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    • note
    • 1H NMR chemical shifts, is presumably very close in structure to trifluoroacetato palladium(II) 2,4,5-trimethoxybenzoate (2), perhaps containing an O-bound rather than S-bound DMSO ligand or ligands.
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    • note
    • 13C NMR spectra of intermediates in the reaction.
  • 8
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    • note
    • H ca. 5.4-6.2 were observed at 12 h (Figure 4c). It is possible that these broadened peaks correspond to unreacted tert-butyl acrylate, shifted and broadened as a consequence of interaction with a Pd(II) species in solution.
  • 10
    • 0000198995 scopus 로고
    • Similar observations have been reported in conventional Heck reactions with acrylonitrile. Spencer, A. J. Organomet. Chem. 1984, 270, 115-120.
    • (1984) J. Organomet. Chem. , vol.270 , pp. 115-120
    • Spencer, A.1
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    • note
    • 7).
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    • The other is benzyltriphenylphosphonium cis-[dichloro(2,4,6- trinitrophenyl)-(dimethyl sulfoxide-S)palladium(II)]: Vicente, J.; Arcas, A.; Borrachero, M. V. J. Organomet. Chem. 1989, 359, 127-137.
    • (1989) J. Organomet. Chem. , vol.359 , pp. 127-137
    • Vicente, J.1    Arcas, A.2    Borrachero, M.V.3
  • 19
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    • For other examples of the importance of DMSO as a solvent in Pd-catalyzed processes, see: (a) Larock, R. C.; Hightower, T. R. J. Org. Chem. 1993, 58, 5298-5300.
    • (1993) J. Org. Chem. , vol.58 , pp. 5298-5300
    • Larock, R.C.1    Hightower, T.R.2
  • 25
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    • Some substrates lacking an ortho substituent undergo competitive ortho-palladation to form isocoumarin products; however, this transformation does not involve decarboxylation: (a) Miura, M.; Tsuda, T.; Satoh, T.; Pivsa-Art, S.; Nomura, M. J. Org. Chem. 1998, 63, 5211-5215.
    • (1998) J. Org. Chem. , vol.63 , pp. 5211-5215
    • Miura, M.1    Tsuda, T.2    Satoh, T.3    Pivsa-Art, S.4    Nomura, M.5
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    • See ref 2
    • (b) See ref 2.
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    • Examples of NMR studies of σ-aralkylpalladium(II) intermediates in the Heck reaction: (a) Li, C.-S.; Jou, D.-C.; Cheng, C.-H. Organometallics 1993, 12, 3945-3954.
    • (1993) Organometallics , vol.12 , pp. 3945-3954
    • Li, C.-S.1    Jou, D.-C.2    Cheng, C.-H.3
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