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2. (a) Harding, K. E.; Tiner, T.H. In Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Pergamon Press: Oxford, 1991; vol. 4, pp 363-421.
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4. Palladium catalyzed intermolecular hydroaminations have been reported. See, (a) Coulson, D. R. J. Org. Chem. 1973, 38, 1483-1490.
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Formic acid and chloroacetic acid also exhibited similar activation effect on the reaction rate and chemical yield. However, trifluoroacetic acid and CSA did not work well
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6. Formic acid and chloroacetic acid also exhibited similar activation effect on the reaction rate and chemical yield. However, trifluoroacetic acid and CSA did not work well.
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14
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37049071377
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7. The 2,5-cis selectivity was observed for the Ag-mediated cyclization reaction of N-(1-phenyl-hexa-4,5-dienyl)-p-toluenesulfonamide. Gallagher, T.; Jones, S. W.; Mahon, M. F.; Molloy, K. C. J. Chem. Soc., Perkin Trans. 1 1991, 2193-2198.
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8. About the formation of 1,3-dienes from π-allylpalladium species, see, (a) Tsuji, J. In Palladium Reagents and Catalysts; John Wiley & Sons: New York, 1995, pp 356-363.
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0010421749
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Acetic acid would enhance the rate of formation of hydridopalladium(II) species. Presumably, the direct formation of hydridopalladium(II) species from allenic amine derivatives and Pd(0) is sluggish
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9. Acetic acid would enhance the rate of formation of hydridopalladium(II) species. Presumably, the direct formation of hydridopalladium(II) species from allenic amine derivatives and Pd(0) is sluggish.
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18
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0000561761
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We also proposed the hydropalladation mechanism for the intramolecular reaction. See also ref. 5
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10. Trost and Gerusz proposed hydropalladation mechanism for the reaction of allenes with active methylene compounds: J. Am. Chem Soc. 1995, 117, 5156-5157. We also proposed the hydropalladation mechanism for the intramolecular reaction. See also ref. 5.
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11. Gallagher et al. proposed nucleophilic addition to allenes activated by arylpalladium(II) species as an alternative mechanism. However, this mechanism cannot account for the formation of 1,3-diene. Davies, I. W.; Scopes, D. I. C.; Gallagher, T. Synlett 1993, 85-87.
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