Results 11 to 20 of about 31,239,114 (260)

Organocatalytic C–H activation reactions

open access: yesBeilstein Journal of Organic Chemistry, 2012
Organocatalytic C–H activation reactions have recently been developed besides the traditional metal-catalysed C–H activation reactions. The recent non-asymmetric and asymmetric C–H activation reactions mediated by organocatalysts are discussed in this ...
Subhas Chandra Pan
doaj   +2 more sources

Gold(I)-Mediated C−H Activation of Arenes

open access: yes, 2016
Gold(I)-Mediated C−H Activation of ...
Pengfei Lu (549353)   +3 more
core   +9 more sources

Tandem C–O and C–H Activation at Palladium Enables Catalytic Direct C–H Alkenylation with Enol Pivalates [PDF]

open access: yes, 2021
The use of oxygen-based electrophiles in cross-coupling remains challenging for substrates with strong C–O bonds, with few examples that can combine C–O activation with an-other strong-bond activation in tandem.
Nahiane, Pipaon Fernandez   +4 more
core   +2 more sources

δ-C(sp3)H Activation of Free Alcohols Enabled by Rationally Designed H-Bond-Acceptor Ligands [PDF]

open access: yes, 2023
The ability to employ a wide range of native substrates is essential for the broad application of transition-metal-catalyzed C–H activation. Recent advances have made native carboxylic acids, ketones, and amines amenable to C(sp3)–H activation, but ...
Jin-Quan, Yu   +9 more
core   +2 more sources

C—H Activation of Unbiased C(sp3)—H Bonds [PDF]

open access: yes, 2022
The selective functionalization of non-activated C(sp3)—H bonds is a major challenge in chemistry. Here, we have developed an [Au]-catalyzed C(sp3)-H activation of common 1 bromoalkynes into a library of diverse 3D-scaffolds.
Pablo, Barrio   +6 more
core   +2 more sources

Transition Metal-catalyzed C-H /C-C Activation and Coupling with 1, 3-diyne [PDF]

open access: yes, 2022
This review focuses on providing a broad overview of the recent developments in the field of transition metal-catalyzed C-H bond activation and coupling with 1,3-diyne for assembling alkynylated heterocycles and bis-heterocycles.
Tanmayee, Nanda   +4 more
core   +1 more source

Twofold C-H Activation-Based Enantio- and Diastereoselective C-H Arylation Using Diarylacetylenes as Rare Arylating Reagents [PDF]

open access: yes, 2021
C-H bond activation has been established as an attractive strategy to access axially chiral biaryls, and the most straightforward method is direct C-H arylation of arenes.
Xingwei, Li   +4 more
core   +2 more sources

Dual Catalytic C(sp2)–H Activation of Azaheterocycles towards C–N Atropisomers [PDF]

open access: yes, 2023
We describe a PdII-catalyzed enantioselective C(heteroaryl)–H activation method enabled by a chiral transient directing group (cTDG) to gain access to C–N atropisomers.
Quynh, Wong   +5 more
core   +2 more sources

Direct Light Activation of Hypervalent Iodine Reagents: Substrate-Controlled C-C or C-H Alkynylation of Cyclopropanes [PDF]

open access: yes, 2022
We report the direct light activation of ethynylbenziodoxolone (EBX) reagents for the oxyalkynylation of aryl- and amino-cyclopropanes as well as styrenes. Irradiation with visible light at 440 nm promoted the reaction without the need of a photocatalyst.
Tin. V. T. , Nguyen, Jerome, Waser
core   +1 more source

Multiple C–H Activation Enabled Modular Construction of Densely Functionalized Sulfur-Contained Arenes [PDF]

open access: yes, 2021
Modular construction of multiple functionalized arenes from abundant feedstocks, stands as an unremitting pursue goal in synthetic chemistry, which would accelerate the discovery of new drugs an advanced materials.
Jianhang, Rao   +6 more
core   +1 more source

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