3 article(s) from Ohmiya, Hirohisa
- Letter
- Published 07 Feb 2020
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Graphical Abstract
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Scheme 1: Our strategy.
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Scheme 2: Allylic cross-coupling using aldehydes as α-alkoxyalkyl anions.
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Scheme 3: Substrate scope and reaction conditions. a) reactions were carried out with 1 (0.4 mmol), 2 (0.2 mm...
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Scheme 4: Stoichiometric reaction.
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Scheme 5: Possible pathway.
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- Full Research Paper
- Published 04 Dec 2015
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Scheme 1: Conjugate addition of alkylborane 2a to alkynoate 3a.
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Scheme 2: Synthesis of five membered carbocycle.
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Scheme 3: Deuterium-labeling experiment.
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Figure 1: Possible mechanism.
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Figure 2: Isomerization of the alkenylcopper intermediates.
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- Full Research Paper
- Published 08 Jul 2011
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Graphical Abstract
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Figure 1: Azepine frameworks found in natural products and pharmaceuticals.
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Figure 2: Semihollow-shaped triethynylphosphine L1.
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Figure 3: Time–conversion profiles for the gold-catalyzed cyclization of 4a with L1, X-Phos and IPr ligands.
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Scheme 1: 8-exo-dig cyclization of sulfonamide 9.
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Scheme 2: Isomerization experiments of 6a.
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Figure 4: Possible pathway for the gold-catalyzed conversion of 4a into 5a.
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