Results 81 to 90 of about 45,374 (213)

Functional group tolerant iron-catalyzed cyclotrimerization of terminal and internal alkynes

Communications Chemistry
Arenes play a crucial role in various fields of chemistry. Since Kekulé proposed the molecular structure of benzene in 1865, chemists have been working to develop methods for preparing functionalized arenes.
Benedict Klinnert, Bernd Plietker
doaj   +1 more source

High chemoselectivity in the phenol synthesis

Beilstein Journal of Organic Chemistry, 2011
Efforts to trap early intermediates of the gold-catalyzed phenol synthesis failed. Neither inter- nor intramolecularly offered vinyl groups, ketones or alcohols were able to intercept the gold carbenoid species. This indicates that the competing steps of
Matthias Rudolph, Melissa Q. McCreery, Wolfgang Frey, A. Stephen K. Hashmi   +3 more
doaj   +1 more source

Organocatalytic Synthesis of Alkynes

, 2016
Carbon–carbon triple bonds of alkynes are ubiquitous. They serve as valuable starting materials that can be transformed into a vast array of diverse materials, with applications ranging from medicinal chemistry to electronic materials.
Tiezheng Jia (1317159), Patrick J. Walsh (304213), Mengnan Zhang (1493557), Carol Y. Wang (1493554)   +3 more
core   +1 more source

Palladium-catalyzed halosulfonylation of alkynes with ionic liquid as the green solvent and halide sources

Green Synthesis and Catalysis
The first palladium-catalyzed halosulfonylation of alkynes with arylsulfonic acid under aerobic conditions was accomplished. This catalytic protocol provides a straightforward and effective synthetic strategy for the assembly of structurally diverse β ...
Yin-Long Lai, Li-Yun Wu, Xun Xiong, Yi-Wei Lan, Yin-Yun Lin, Rui-Min Zhong, Huanfeng Jiang, Jianxiao Li   +7 more
doaj   +1 more source

Multicomponent Polymerization of Alkynes

, 2015
Multicomponent reactions (MCRs) are a group of unique reactions with a number of advantages such as atom economy, high efficiency, and simple procedure.
Rongrong Hu, Ben Zhong Tang, Hu, Rongrong, Tang, Ben Zhong   +3 more
core   +1 more source

2-Diphenylphosphanyl-4-pyridyl(dimethyl) amine as an effective ligand for the ruthenium(II) complex catalyzed homogeneous hydration of nitriles under neutral conditions [PDF]

, 2011
New homogeneous catalyst comprised of [Ru(methallyl)(2)(cod)] (cod = 1,5-cyclooctadiene) (1) and 2-diphenylphosphanyl-4-pyridyl(dimethyl) amine (2) is shown to efficiently catalyze the hydration of various nitriles under neutral conditions. The hydration
Muranaka, Makoto, Toshiyuki Oshiki, Wataru Okumura, Okumura, Wataru, Oshiki, Toshiyuki, Hyodo, Isao, Makoto Muranaka, Isao Hyodo   +7 more
core   +1 more source

A gold-catalyzed alkyne-diol cycloisomerization for the synthesis of oxygenated 5,5-spiroketals

Beilstein Journal of Organic Chemistry, 2011
A highly efficient synthesis of oxygenated 5,5-spiroketals was performed towards the synthesis of the cephalosporolides. Gold(I) chloride in methanol induced the cycloisomerization of a protected alkyne triol with concomitant deprotection to give a ...
Sami F. Tlais, Gregory B. Dudley
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Synthesis of alkynyl-substituted camphor derivatives and their use in the preparation of paclitaxel-related compounds

Beilstein Journal of Organic Chemistry, 2017
Compounds containing two alkyne groups in close vicinity at the rigid skeleton of camphorsulfonamide show unique reactivities when treated with electrophiles or catalytic amounts of platinum(II).
M. Fernanda N. N. Carvalho, Rudolf Herrmann, Gabriele Wagner   +2 more
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Alloying and confinement effects on hierarchically nanoporous CuAu for efficient electrocatalytic semi-hydrogenation of terminal alkynes

Nature Communications
Electrocatalytic alkynes semi-hydrogenation to produce alkenes with high yield and Faradaic efficiency remains technically challenging because of kinetically favorable hydrogen evolution reaction and over-hydrogenation.
Linghu Meng, Cheng-Wei Kao, Zhen Wang, Jun Ma, Peifeng Huang, Nan Zhao, Xin Zheng, Ming Peng, Ying-Rui Lu, Yongwen Tan   +9 more
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Regioselective Pd-Catalyzed Hydroalkynylation of Allenyl-Containing α-Amino Acid Derivatives with Terminal Alkynes

Molecules
An efficient access to the novel representatives of α,α-disubstituted α-amino acids with 1,3-enyne unit located at their side chain has been elaborated.
Alexandra S. Bubnova, Daria V. Vorobyeva, Ivan A. Godovikov, Anna N. Philippova, Pavel S. Gribanov, Evgenia P. Antoshkina, Sergey N. Osipov   +6 more
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