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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
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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
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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
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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
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Generation of Sulfonylated Tetrazoles through an Iron-Catalyzed Multicomponent Reaction Involving Sulfur Dioxide

iScience, 2020
Summary: As a privileged motif, tetrazoles can be widely found in pharmaceuticals and materials science. Herein, a five-component reaction of cycloketone oxime esters, alkynes, DABCO·(SO2)2, and two molecules of trimethylsilyl azide under iron catalysis ...
Jun Zhang, Xuefeng Wang, Yunyan Kuang, Jie Wu   +3 more
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«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
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Nickel-catalyzed deaminative Sonogashira coupling of alkylpyridinium salts enabled by NN2 pincer ligand

Nature Communications, 2021
Alkynes are amongst the most valuable functional groups in organic chemistry, however, the preparation of alkyl-substituted alkynes still remains elusive. Here the authors show a nickel-catalyzed deaminative Sonogashira coupling of alkylpyridinium salts.
Xingjie Zhang, Di Qi, Chenchen Jiao, Xiaopan Liu, Guisheng Zhang   +4 more
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Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry

Molecules, 2019
The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic ...
Igor V. Alabugin, Edgar Gonzalez-Rodriguez, Rahul Kisan Kawade, Aleksandr A. Stepanov, Sergei F. Vasilevsky   +4 more
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[3+2] Cycloaddition of alkyl aldehydes and alkynes enabled by photoinduced hydrogen atom transfer

Nature Communications, 2022
In contrast to the prevalence of 1,3-dipolar cycloadditions, radical [3+2] annulations of alkynes are underexplored. Here, the authors describe [3+2] cycloadditions of various internal alkynes with readily accessible aliphatic aldehydes via photoinduced ...
Siya Le, Ji Li, Jian Feng, Zuxiao Zhang, Yihui Bai, Zheliang Yuan, Gangguo Zhu   +6 more
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Synthesis of aryl-1H-1,2,3-triazoles via 1,3-dipolar cycloaddition

Orbital: The Electronic Journal of Chemistry, 2012
A series of Aryl-1H-1,2,3-triazoles were prepared from the reaction between aril-azide (1) with 1.5 equiv. of terminal alkynes (2a-o). The reactions carried out at room temperature and in the presence of CuI (10 mol%) in acetonitrile. The compounds (3a-o)
Wagner O. Valença, Jucleiton José R. de Freitas, Ronaldo N. de Oliveira   +2 more
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