[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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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 +2 more
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Selective Manganese-Catalyzed Dimerization and Cross-Coupling of Terminal Alkynes [PDF]
, 2021 For the first time, an efficient manganese-catalyzed dimerization of terminal alkynes to afford 1,3-enynes is described. This reaction is atom economic, implementing an inexpensive, earth abundant non-precious metal catalyst.
Karl, Kirchner +5 more
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Beilstein Journal of Organic Chemistry, 2019 An iodine-mediated hydration reaction of alkynes serves as a green alternative to metal-catalyzed procedures. Previous work has shown that this method works well with terminal alkynes on keto-functionalized scaffolds, including 1,3-dicarbonyls and their ...
Zachary Lee +8 more
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Chemoselective Biohydrogenation of Alkenes in the Presence of Alkynes for the Homologation of 2‐Alkynals/3‐Alkyn‐2‐ones into 4‐Alkynals/Alkynols [PDF]
Advanced Synthesis & Catalysis, 2019 AbstractThe chemoselective hydrogenation of alkenes in the presence of alkynes is a very challenging transformation to achieve with traditional chemical methods. The development of an effective procedure to perform this transformation would enrich the tool‐kit available to organic chemists for the development of useful synthetic routes, and the ...
Colombo D. +6 more
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Reactions of Tetracyclone Molybdenum Complexes with Electrophilic Alkynes: Cyclopentadienone–Alkyne Coupling and Alkyne Coordination [PDF]
Organometallics, 2017 The reactions of the complexes [Mo(CO)2(η4-C4Ph4CO)2] and [Mo(CO)3(NCMe)(η4-C4Ph4CO)] with the alkynes dimethyl acetylenedicarboxylate (DMAD; RC≡CR where R = CO2Me) and methyl propiolate (RC≡CH) have been studied. In the case of DMAD, the initial product is the green carbonyl complex [Mo(CO)(RC≡CR)(η5,σ-C4Ph4COCR═CR)] (3), in which two alkyne molecules
Adams, H. +4 more
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Recent Advances in the Addition of Amide/Sulfonamide Bonds to Alkynes
Molecules, 2019 The addition of amide/sulfonamide bonds to alkynes is not only one of the most important strategies for the direct functionalization of carbon–carbon triple bonds, but also a powerful tool for the downstream transformations of amides/sulfonamides ...
Fei Zhao +5 more
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Efficient Sonogashira Coupling Reaction Catalyzed by Copper (I) Iodide in the Presence of KF/Al2O3 [PDF]
شیمی کاربردی روز, 2009 We have developed a convenient and efficient method for coupling of aryl iodides and bromides with terminal alkynes. The protocol uses CuI as catalyst, 1, 10-phenanthroline as ligand, KF/Al2O3 as base and toluene as solvent.
Rahman Hosseinzadeh +2 more
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Selective C-H Halogenation of Alkenes and Alkynes Using Flavin-Dependent Halogenases [PDF]
, 2023 Single component flavin-dependent halogenases (FDHs) possesses both flavin reductase and FDH activity in a single enzyme. We recently reported that the single component FDH AetF catalyzes site-selective bromination and iodination of a variety of aromatic
Cahmlo, Olive +3 more
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Iron-catalyzed formation of six-membered rings from alkyne
Green Synthesis and CatalysisIron compounds, exhibiting high catalytic behavior and excellent compatibility, have been considered as low-toxic, cheap, efficient, and green catalysts for many important organic transformations.
Hui Li +7 more
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