The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Masahiro Terada - One of the best experts on this subject based on the ideXlab platform.
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relay catalysis by a metal complex bronsted acid binary system in a tandem isomerization Carbon Carbon Bond forming sequence
Journal of the American Chemical Society, 2008Co-Authors: Kenji Sorimachi, Masahiro TeradaAbstract:A one-pot tandem isomerization/Carbon−Carbon Bond forming sequence catalyzed by a ruthenium complex/Bronsted acid binary system is demonstrated. The method enables the use of readily available allylamides to deliver reactive imines under relay catalysis using a binary catalytic system. Subsequent Bronsted acid catalyzed Carbon−Carbon Bond forming reactions of the generated imines with nucleophilic components afforded Friedel−Crafts and Mannich products in good yields.
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Relay catalysis by a metal-complex/Brønsted acid binary system in a tandem isomerization/Carbon-Carbon Bond forming sequence.
Journal of the American Chemical Society, 2008Co-Authors: Keiichi Sorimachi, Masahiro TeradaAbstract:A one-pot tandem isomerization/Carbon−Carbon Bond forming sequence catalyzed by a ruthenium complex/Bronsted acid binary system is demonstrated. The method enables the use of readily available allylamides to deliver reactive imines under relay catalysis using a binary catalytic system. Subsequent Bronsted acid catalyzed Carbon−Carbon Bond forming reactions of the generated imines with nucleophilic components afforded Friedel−Crafts and Mannich products in good yields.
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binaphthol derived phosphoric acid as a versatile catalyst for enantioselective Carbon Carbon Bond forming reactions
Chemical Communications, 2008Co-Authors: Masahiro TeradaAbstract:Binaphthol-derived monophosphoric acids have been designed as novel chiral Bronsted-acid catalysts. The chiral phosphoric acids thus developed function as efficient enantioselective catalysts for a variety of organic transformations, especially for Carbon–Carbon Bond forming reactions.
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Binaphthol-derived phosphoric acid as a versatile catalyst for enantioselective Carbon–Carbon Bond forming reactions
Chemical communications (Cambridge England), 2008Co-Authors: Masahiro TeradaAbstract:Binaphthol-derived monophosphoric acids have been designed as novel chiral Bronsted-acid catalysts. The chiral phosphoric acids thus developed function as efficient enantioselective catalysts for a variety of organic transformations, especially for Carbon–Carbon Bond forming reactions.
Gregory B Dudley - One of the best experts on this subject based on the ideXlab platform.
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A Tandem Carbanion Addition/Carbon−Carbon Bond Cleavage Yields Alkynyl Ketones
Journal of the American Chemical Society, 2005Co-Authors: Shin Kamijo, Gregory B DudleyAbstract:Carbanion addition to vinylogous acid triflates triggers Carbon−Carbon Bond cleavage to form alkynyl ketones under mild conditions. Mechanistic factors affecting the cleavage event and its relationship to complementary fragmentations are discussed. A range of tethered keto−alkynes are obtained by a unified approach.
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a tandem carbanion addition Carbon Carbon Bond cleavage yields alkynyl ketones
Journal of the American Chemical Society, 2005Co-Authors: Shin Kamijo, Gregory B DudleyAbstract:Carbanion addition to vinylogous acid triflates triggers Carbon−Carbon Bond cleavage to form alkynyl ketones under mild conditions. Mechanistic factors affecting the cleavage event and its relationship to complementary fragmentations are discussed. A range of tethered keto−alkynes are obtained by a unified approach.
Kin Shing Chan - One of the best experts on this subject based on the ideXlab platform.
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Regioselective and Room-Temperature Carbon–Carbon Bond Activation of Cyclopropanes by Rhodium(II) Porphyrin
Synlett, 2017Co-Authors: Shiyu Feng, Kin Shing ChanAbstract:Regioselective Carbon–Carbon Bond activation of cyclopropanes by Rh II (tmp) (tmp = 5,10,15,20-tetramesitylporphyrinato dianion) was achieved at room temperature under neutral conditions to yield corresponding rhodium–porphyrin alkyls. This reaction can tolerate water, and functional groups are compatible.
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Selective Aliphatic Carbon-Carbon Bond Activation by Rhodium Porphyrin Complexes.
Accounts of chemical research, 2017Co-Authors: Kin Shing ChanAbstract:ConspectusThe Carbon–Carbon Bond activation of organic molecules with transition metal complexes is an attractive transformation. These reactions form transition metal–Carbon Bonded intermediates, which contribute to fundamental understanding in organometallic chemistry. Alternatively, the metal–Carbon Bond in these intermediates can be further functionalized to construct new Carbon–(hetero)atom Bonds. This methodology promotes the concept that the Carbon–Carbon Bond acts as a functional group, although Carbon–Carbon Bonds are kinetically inert. In the past few decades, numerous efforts have been made to overcome the chemo-, regio- and, more recently, stereoselectivity obstacles. The synthetic usefulness of the selective Carbon–Carbon Bond activation has been significantly expanded and is becoming increasingly practical: this technique covers a wide range of substrate scopes and transition metals.In the past 16 years, our laboratory has shown that rhodium porphyrin complexes effectively mediate the interm...
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Aliphatic Carbon−Carbon Bond Activation of Nitriles by Rhodium(II) Porphyrin
Organometallics, 2007Co-Authors: Kin Shing Chan, Chun Wah Fung, Lirong ZhangAbstract:The aliphatic C(α)−C(β) Bonds of a series of nitriles were activated by Rh(tmp) using Ph3P as the promoting ligand from 100 to 130 °C. Kinetic studies at 130 °C revealed the rate law, rate = k‘K1[Rh(tmp)][Ph3P]n + k3K2(K1[Ph3P])/ (1 + K1[Ph3P])[Rh(tmp)][tBuCN] and suggested the Carbon−Carbon Bond activation occurred at the coordinated tBuCN with Rh(tmp) in a 1:1 ratio in the transition state.
Cyril Ollivier - One of the best experts on this subject based on the ideXlab platform.
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Visible-light photocatalytic oxidation of 1,3-diCarbonyl compounds and Carbon–Carbon Bond formation
Organic Chemistry Frontiers, 2014Co-Authors: Marion Daniel, Louis Fensterbank, Jean-philippe Goddard, Cyril OllivierAbstract:Visible-light photocatalytic oxidation of 1,3-diCarbonyl compounds, using Ru(bpy)3Cl2 as a photocatalyst and combining molecular oxygen and triphenylcarbenium as a new sacrificial acceptor, has been developed for Carbon–Carbon Bond formation giving access to dimerization, allylation and polycyclization products.
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Visible-light photocatalytic oxidation of 1,3-diCarbonyl compounds and Carbon-Carbon Bond formation
Organic Chemistry Frontiers, 2014Co-Authors: Marion Daniel, Louis Fensterbank, Jean-philippe Goddard, Cyril OllivierAbstract:Visible-light photocatalytic oxidation of 1,3-diCarbonyl compounds, using Ru(bpy)(3)Cl-2 as a photocatalyst and combining molecular oxygen and triphenylcarbenium as a new sacrificial acceptor, has been developed for Carbon-Carbon Bond formation giving access to dimerization, allylation and polycyclization products.
Shin Kamijo - One of the best experts on this subject based on the ideXlab platform.
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A Tandem Carbanion Addition/Carbon−Carbon Bond Cleavage Yields Alkynyl Ketones
Journal of the American Chemical Society, 2005Co-Authors: Shin Kamijo, Gregory B DudleyAbstract:Carbanion addition to vinylogous acid triflates triggers Carbon−Carbon Bond cleavage to form alkynyl ketones under mild conditions. Mechanistic factors affecting the cleavage event and its relationship to complementary fragmentations are discussed. A range of tethered keto−alkynes are obtained by a unified approach.
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a tandem carbanion addition Carbon Carbon Bond cleavage yields alkynyl ketones
Journal of the American Chemical Society, 2005Co-Authors: Shin Kamijo, Gregory B DudleyAbstract:Carbanion addition to vinylogous acid triflates triggers Carbon−Carbon Bond cleavage to form alkynyl ketones under mild conditions. Mechanistic factors affecting the cleavage event and its relationship to complementary fragmentations are discussed. A range of tethered keto−alkynes are obtained by a unified approach.
