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Volumn 16, Issue 46, 2010, Pages 13814-13824

Mechanistic investigation of organolanthanide-mediated hydroamination of conjugated aminodienes: A comprehensive computational assessment of various routes for diene activation

Author keywords

density functional calculations; dienes; hydroamination; lanthanides; reaction mechanisms

Indexed keywords

ACTIVATION ANALYSIS; CATALYSTS; CHEMICAL ACTIVATION; DENSITY FUNCTIONAL THEORY; LANTHANUM COMPOUNDS; OLEFINS; RARE EARTH ELEMENTS;

EID: 78649913033     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.201001358     Document Type: Article
Times cited : (15)

References (138)
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    • For reviews of catalytic hydroamination, see
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    • For cyclohydroamination mediated by organolanthanides, see
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    • For some leading references, see
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    • For computational studies of organolanthanide-assisted intramolecular HA of various substrate classes, see: aminoalkene substrates
    • For computational studies of organolanthanide-assisted intramolecular HA of various substrate classes, see: aminoalkene substrates
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    • aminodiene substrates
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    • A possible explanation for the observed KIE in aminoalkene HA in the context of the La-N σ-bond insertive mechanism with turnover-limiting cyclisation is given in reference [2b]. Note that the rate-limiting step of the insertive mechanism is not identical for the various substrate classes; cyclisation is the rate-limiting event for aminoalkenes/-alkynes (ref. [4a,b]), whereas for aminoallenes/-dienes protonolysis is turnover limiting (ref. [4c,d])
    • A possible explanation for the observed KIE in aminoalkene HA in the context of the La-N σ-bond insertive mechanism with turnover-limiting cyclisation is given in reference [2b]. Note that the rate-limiting step of the insertive mechanism is not identical for the various substrate classes; cyclisation is the rate-limiting event for aminoalkenes/-alkynes (ref. [4a,b]), whereas for aminoallenes/-dienes protonolysis is turnover limiting (ref. [4c,d])
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    • -1 (RT); reference [7a]; see also references [2n and 2m]
    • -1 (RT); reference [7a]; see also references [2n and 2m].
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    • For computational studies of Group 4 transition-metal-assisted intramolecular HA of various substrate classes, see: aminoalkene substrates
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    • For computational studies of transition metal- and organolanthanide- assisted intermolecular HA, see
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    • For a computational study of late transition-metal assisted HA of aminoalkenes, see:, K. D. Hesp, S. Tobisch, M. Stradiotto, J. Am. Chem. Soc. 2010, 132, 413.
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    • The data presented herein for the lanthanocene-amido catalyst species and relevant steps of the Ln-N σ-bond insertive mechanism can deviate somewhat from the ones reported in reference [4d] on the identical catalyst system, which used a different (BP86) DFT method. The present study can be regarded as being superior, because of the applied state-of-the-art methodology that involves a more consistent treatment of the authentic reaction conditions, together with the usage of the modern, almost nonempirical, well-performing meta-GGA TPSS functional, as detailed in the computational methodology section
    • The data presented herein for the lanthanocene-amido catalyst species and relevant steps of the Ln-N σ-bond insertive mechanism can deviate somewhat from the ones reported in reference [4d] on the identical catalyst system, which used a different (BP86) DFT method. The present study can be regarded as being superior, because of the applied state-of-the-art methodology that involves a more consistent treatment of the authentic reaction conditions, together with the usage of the modern, almost nonempirical, well-performing meta-GGA TPSS functional, as detailed in the computational methodology section.
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    • The notation of key structures has been chosen according to reference [4d]
    • The notation of key structures has been chosen according to reference [4d].
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    • Substrate association and dissociation steps are known to be facile in organolanthanide-mediated intramolecular hydroamination. For NMR evidence of rapid association/dissociation of free amine and of amido/amine permutation see reference [2b]
    • Substrate association and dissociation steps are known to be facile in organolanthanide-mediated intramolecular hydroamination. For NMR evidence of rapid association/dissociation of free amine and of amido/amine permutation see reference [2b].
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    • See the Supporting Information for more detail
    • See the Supporting Information for more detail.
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    • 2La-amidodiene-substrate] form 3 t -S1 of the La-amido catalyst complex (with the appropriate number of substrate molecules) has been chosen as reference for relative free energies
    • 2La-amidodiene-substrate] form 3 t -S1 of the La-amido catalyst complex (with the appropriate number of substrate molecules) has been chosen as reference for relative free energies.
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    • Only the most accessible pathways are shown; see the SI for a complete account of all the studied pathways
    • Only the most accessible pathways are shown; see the SI for a complete account of all the studied pathways.
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    • 2La backbone are omitted for the sake of clarity. Note that the amino-/amidodiene units are displayed in a truncated fashion for several of the species
    • 2La backbone are omitted for the sake of clarity. Note that the amino-/amidodiene units are displayed in a truncated fashion for several of the species.
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    • 8, but a tentative structure for 3 t -S2 → 6 a -S1 transformation in a single step. Notably, the corresponding TS structure could not be located (see the text)
    • 8, but a tentative structure for 3 t -S2 → 6 a -S1 transformation in a single step. Notably, the corresponding TS structure could not be located (see the text).
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    • 3-allylic structures in organo-4f-element chemistry; see for instance
    • 3-allylic structures in organo-4f-element chemistry; see for instance
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    • -1
    • -1.
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    • Examination by a linear-transit approach gave no indication that this process is associated with a significant enthalpy barrier
    • Examination by a linear-transit approach gave no indication that this process is associated with a significant enthalpy barrier.
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    • -1 (Figure 7) for the most accessible pathways of the selectivity-determining and turnover-limiting aminolysis that leads to P6 a / P6 b / P6 c corresponds to a P6 a: P6 b: P6 c ratio of 98:2:0 (298.15 K) upon application of Stefan-Boltzmann statistics. A more detailed analysis can be found in reference [4d]
    • -1 (Figure 7) for the most accessible pathways of the selectivity-determining and turnover-limiting aminolysis that leads to P6 a / P6 b / P6 c corresponds to a P6 a: P6 b: P6 c ratio of 98:2:0 (298.15 K) upon application of Stefan-Boltzmann statistics. A more detailed analysis can be found in reference [4d].
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    • For further details, see:.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.