Results 11 to 20 of about 121,575 (333)
Electrochemical cyclization of alkynes to construct five-membered nitrogen-heterocyclic rings [PDF]
Beilstein Journal of Organic ChemistryOrganic 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 +10 more
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Functional group tolerant iron-catalyzed cyclotrimerization of terminal and internal alkynes [PDF]
Communications ChemistryArenes 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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Angewandte Chemie, 2020 Alkynes are an important class of organic molecules due to their utility as versatile building blocks in synthesis. Although efforts have been devoted to the difunctionalization of alkynes, general and practical strategies for the direct hydroalkylation ...
Huifeng Yue +4 more
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Synthesis of 1,4-Disubstituted Mono and Bis-triazolocarbo-acyclonucleoside Analogues of 9-(4-Hydroxybutyl)guanine by Cu(I)-Catalyzed Click Azide-Alkyne Cycloaddition [PDF]
, 2011 A series of novel mono-1,2,3-triazole and bis-1,2,3-triazole acyclonucleoside analogues of 9-(4-hydroxybutyl)guanine was prepared via copper(I)-catalyzed 1,3-dipolar cycloaddition of N-9 propargylpurine, N-1-propargylpyrimidines/as-triazine with the ...
Engels, Joachim W. +2 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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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 +4 more
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The intermolecular hydro-oxycarbonylation of internal alkynes: current state of the art [PDF]
, 2018 The authors acknowledge the Spanish MINECO (projects CTQ2013-40591-P and CTQ2016-75986-P) and the Gobierno del Principado de Asturias (project GRUPIN14-006) for financial support. J. F.
Cadierno Menéndez, Victorio +3 more
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Gold(I)-Catalyzed Activation of Alkynes for the Construction of Molecular Complexity
Chemical Reviews, 2015 1.1. General Reactivity of Alkyne-Gold(I) Complexes For centuries, gold had been considered a precious, purely decorative inert metal. It was not until 1986 that Ito and Hayashi described the first application of gold(I) in homogeneous catalysis.1 More ...
Ruth Dorel, A. Echavarren
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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 +6 more
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A Simple Nickel Catalyst Enabling an E‐Selective Alkyne Semihydrogenation [PDF]
, 2019 Stereoselective alkyne semihydrogenations are attractive approaches to alkenes, which are key building blocks for synthesis. With regards to the most atom economic reducing agent dihydrogen (H 2 ), only few catalysts for the challenging E ‐selective ...
Kaewmee, Benyapa +3 more
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