Results 201 to 210 of about 16,283 (253)
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1996
This chapter focuses on the differences between alkynes and alkenes, particularly those that affect synthetic work. It explains that one difference concerns the CC double bond, which is usually created from saturated intermediates by elimination but is formed in a different way in alkynes.
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This chapter focuses on the differences between alkynes and alkenes, particularly those that affect synthetic work. It explains that one difference concerns the CC double bond, which is usually created from saturated intermediates by elimination but is formed in a different way in alkynes.
openaire +1 more source
Hydrofluoroarylation of alkynes with fluoroarenes
Dalton Transactions, 2010A combination of Ni(cod)(2) and PCyp(3) is found to be an effective catalyst for chemoselective activation of the C-H bond of fluoroarenes over C-F bonds followed by insertion of alkynes to allow direct alkenylation of the electron-deficient arenes.
Kanyiva, Kyalo Stephen +5 more
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Electrochemical Difluoromethylarylation of Alkynes
Journal of the American Chemical Society, 2018An unprecedented radical difluoromethylarylation reaction of alkynes has been developed by discovering a new difluoromethylation reagent, CF2HSO2NHNHBoc. This air-stable and solid reagent can be prepared in one step from commercially available reagents CF2HSO2Cl and NH2NHBoc.
Peng Xiong +3 more
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Trifunctionalization of alkenes and alkynes
Organic & Biomolecular Chemistry, 2020In this review, the development of trifunctionalization methods for alkenes and alkynes, including arynes and allenes, over the last decade is disclosed.
Sumit Ghosh, Dipti Lai, Alakananda Hajra
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Organocatalytic Synthesis of Alkynes
Journal of the American Chemical Society, 2015Carbon-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. The methods used to prepare alkynes involve stoichiometric reactions and the most popular install only a single carbon
Mengnan, Zhang +3 more
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Electrochemical hydrotrifluoromethylation of alkynes
Chemical CommunicationsAn electrochemical hydrotrifluoromethylation of alkynes was developed using the Langlois reagent as a CF3 source and DMSO as both solvent and hydrogen atom donor.
Jihoon Jang, Eun Jin Cho
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Angewandte Chemie International Edition, 2013
AbstractThe early years of alkyne metathesis were marked by a somewhat ironic state of affairs: the proposed mechanism was swiftly validated and more than one effective catalyst became available shortly after the discovery of this transformation; surprisingly, however, the impact on synthesis remained very limited for a long period of time.
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AbstractThe early years of alkyne metathesis were marked by a somewhat ironic state of affairs: the proposed mechanism was swiftly validated and more than one effective catalyst became available shortly after the discovery of this transformation; surprisingly, however, the impact on synthesis remained very limited for a long period of time.
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ChemInform, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. J. PEARSON, R. A. DUBBERT
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. J. PEARSON, R. A. DUBBERT
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Diiodotrifluoromethoxylation of Terminal Alkynes
The Journal of Organic ChemistryGiven the unique properties of the trifluoromethoxy (OCF3) group and the broad utility of alkenes, synthesis of trifluoromethoxylated alkenes, particularly those incorporating halogen substituents, is of significant importance. While chloro-/bromo-trifluoromethoxylated alkenes are established, iodo variants remain underdeveloped (single example, 18 ...
Muhammad Bilal Altaf +4 more
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