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2 article(s) from Fernández, Israel

Transition-state aromaticity and its relationship with reactivity in pericyclic reactions

Israel Fernández

Beilstein J. Org. Chem. 2025, 21, 1613–1626, doi:10.3762/bjoc.21.125

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Scheme 1: (a) Diels–Alder cycloaddition reaction between butadiene and ethylene. (b) Gold(I)-catalyzed propar...

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Figure 1: Transition states computed for the Diels–Alder cycloaddition reaction between isoprene and methyl a...

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Figure 2: Comparative activation strain analyses (a) and energy decomposition analysis (b) of the Diels–Alder...

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Figure 3: (a) Evolution of the NICS(3, +1) values along a z-axis perpendicular to the molecular plane of the ...

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Figure 4: Comparative activation strain analyses (a) and energy decomposition analysis (b) of the carbonyl–en...

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Figure 5: AICD (a) and EDDB (b) plots for the transition state involved in the DGRT between ethene and ethane....

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Figure 6: Comparative activation strain analyses (a) and energy decomposition analysis (b) of the DGRT betwee...

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Scheme 2: Representative cycloisomerization reaction of 1,3-hexadien-5-yne.

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Figure 7: AICD plots of the transition states associated with the Hopf cyclization reactions involving cis-he...

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Figure 8: Comparative activation strain analyses of the Hopf cyclization involving ene–ene–ynes E=CH–CH=CH–C≡...

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Scheme 3: 1,3-Dipolar cycloaddition reactions between t-BuN₃ and cyaphide complexes.

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Figure 9: Evolution of the NICS(3, +1) values along a z-axis perpendicular to the molecular plane of the TSs ...

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Figure 10: Comparative activation strain analyses (a) and energy decomposition analysis (b) of the 1,3-dipolar...

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Perspective

Published 12 Aug 2025

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Gold-catalyzed oxycyclization of allenic carbamates: expeditious synthesis of 1,3-oxazin-2-ones

Benito Alcaide,
Pedro Almendros,
M. Teresa Quirós and
Israel Fernández

Beilstein J. Org. Chem. 2013, 9, 818–826, doi:10.3762/bjoc.9.93

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Scheme 1: Preparation of allenic carbamates 2a–j. Reagents and conditions: (i) Propargylamine, MgSO₄, CH₂Cl₂,...

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Scheme 2: Controlled oxycyclization reactions of allenic carbamates 2 to 1,3-oxazinan-2-ones 3 and 1,3-oxazin...

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Scheme 3: Possible explanation for the gold-catalyzed isomerization reaction of 1,3-oxazinan-2-one 3a into 1,...

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Scheme 4: Mechanistic explanation for the gold-catalyzed oxycyclization reactions of allenic carbamates 2 int...

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Figure 1: Computed reaction profile for the reaction of AuPMe₃⁺ and 1M. Numbers indicate the corresponding PC...

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Full Research Paper

Published 26 Apr 2013

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