Results 1 to 10 of about 71,058 (285)

Electrochemical cyclization of alkynes to construct five-membered nitrogen-heterocyclic rings [PDF]

Beilstein Journal of Organic Chemistry
Organic five-membered rings have shown significant applications in the fields of organic synthesis, natural products, organic materials and pharmaceuticals for their unique characteristics. Electrochemical construction of five-membered rings from alkynes
Lifen Peng, Ting Wang, Zhiwen Yuan, Bin Li, Zilong Tang, Xirong Liu, Hui Li, Guofang Jiang, Chunling Zeng, Henry N. C. Wong, Xiao-Shui Peng   +10 more
doaj   +2 more sources

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

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   +2 more sources

Base-Promoted One-Pot Synthesis of Pyridine Derivatives via Aromatic Alkyne Annulation Using Benzamides as Nitrogen Source

Molecules, 2021
In the presence of Cs2CO3, the first simple, efficient, and one-pot procedure for the synthesis of 3,5-diaryl pyridines via a variety of aromatic terminal alkynes with benzamides as the nitrogen source in sulfolane is described. The formation of pyridine
Hina Mehmood, Muhammad Asif Iqbal, Muhammad Naeem Ashiq, Ruimao Hua   +3 more
doaj   +1 more source

One-Pot Iridium Catalyzed C–H Borylation/Sonogashira Cross-Coupling: Access to Borylated Aryl Alkynes

Molecules, 2020
Borylated aryl alkynes have been synthesized via one-pot iridium catalyzed C–H borylation (CHB)/Sonogashira cross-coupling of aryl bromides. Direct borylation of aryl alkynes encountered problems related to the reactivity of the alkyne under CHB ...
Ghayoor A. Chotana, Jose R. Montero Bastidas, Susanne L. Miller, Milton R. Smith, Robert E. Maleczka   +4 more
doaj   +1 more source

A Platinum molecular complex immobilised on the surface of graphene as active catalyst in alkyne hydrosilylation [PDF]

, 2020
A platinum complex bearing a N‐heterocyclic carbene (NHC) ligand functionalised with a pyrene‐tag is immobilised onto the surface of reduced graphene oxide (rGO).
Borja, Pilar, Guisado‐Barrios, Gregorio, Martín, Santiago, Mata, Jose A., Mollar-Cuni, Andrés   +4 more
core   +3 more sources

Platinum nanoparticles stabilized by N-heterocyclic thiones. Synthesis and catalytic activity in mono- and di-hydroboration of alkynes [PDF]

, 2020
N-Heterocyclic Thiones (NHT) proved to be efficient ligands for the stabilization of small platinum nanoparticles (1.3-1.7 nm), synthesized by decomposition of [Pt(dba)2], under a H2 atmosphere, in the presence of variable sub-stoichiometric amounts of ...
Conejero, Salvador, Espinós Manzorro, Juan Pedro, Figueiredo, Rute C., Franconetti García, Antonio, Jaime, Carlos, Lacroix, Bertrand, Lara Muñoz, Patricia, Moraes Teixeira, Leonardo César de, Vattier Lagarrigue, María Florencia   +8 more
core   +1 more source

Ti(O-iPr)₄-EtMgBr-Catalyzed Reaction of Dialkyl-Substituted Alkynes with Et₂Zn

Chemistry Proceedings, 2021
For the first time, the Ti(O-iPr)4-EtMgBr carbozincation of dialkyl-substituted alkynes with Et2Zn was carried out. It was found that the reaction of 1,2-disubstituted alkynes (5-decyne, 4-octyne, 3-hexyne) with Et2Zn is accompanied by the regioselective
Azat M. Gabdullin, Oleg S. Mozgovoj, Rita N. Kadikova, Ilfir R. Ramazanov, Usein M. Dzhemilev   +4 more
doaj   +1 more source

Highly selective electrochemical hydrogenation of alkynes: Rapid construction of mechanochromic materials [PDF]

, 2019
Electrochemical hydrogenation has emerged as an environmentally benign and operationally simple alternative to traditional catalytic reduction of organic compounds.
Ge, Haibo, Li, Bijin
core   +1 more source

«STRUCTURE OF ALKYNES C2H2 — C9H16 HEAT OF VAPORIZATION» CORRELATION

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2014
To investigate the quantitative correlation «structure of 132 alkynes C2H2−C9H16 – property», topological indexes χ Randich and ∆i3 were used. Then using the two-parameter functions, quantitative correlation «structure of alkynes – property» are ...
V.V. Grebeshkov, V.M. Smolyakov
doaj   +1 more source

Recent Advances in the Synthetic and Mechanistic Aspects of the Ruthenium-catalyzed Carbon-heteroatom Bond Forming Reactions of Alkenes and Alkynes [PDF]

, 2011
The group’s recent advances in catalytic carbon-to-heteroatom bond forming reactions of alkenes and alkynes are described. For the C–O bond formation reaction, a well-defined bifunctional ruthenium-amido catalyst has been successfully employed for the ...
Yi, Chae S.
core   +2 more sources