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and references therein
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79952051812
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note
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In previous contributions it has been observed that the C-C bond-forming reaction occurs preferentially over a Pd-catalyzed amination with secondary amines (Ref. [5]).
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We have recently reported that the cross-coupling reaction of tosylhydrazones derived from a-chiral ketones proceeds with preservation of the chirality
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We have recently reported that the cross-coupling reaction of tosylhydrazones derived from a-chiral ketones proceeds with preservation of the chirality: J. Barluenga, M. Escribano, F. Aznar, C. Valdés, Angew. Chem. 2010, 122, 7008;
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79952053917
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note
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Although the Mannich reaction gives rise to a mixture of two diastereomers, they could be separated at the tosylhydrazone stage, and thus the Pd-catalyzed cascade reaction was carried out with a single diastereoisomer.
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37
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17144422067
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I. Ibrahem, J. Casas, A. Córdova, Angew. Chem. 2004, 116, 6690;
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79952067166
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note
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In our hands, attempts to isolate the Mannich adducts prior to formation of the hydrazone led to partial epimerization.
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41
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79952052417
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note
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The Mannich reaction leads to a mixture of diastereoisomers that could not be separated, and therefore were employed as a mixture in the Pd-catalyzed cascade reaction.
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