Results 41 to 50 of about 45,374 (213)
Nature Communications, 2023 Generally, transition metal-catalyzed stereodivergent transfer semihydrogenation of alkynes realized regulation of stereoselectivity by a Z to E isomerization process.
Yuanqi Wu +9 more
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Molecules, 2021 Bismuth subnitrate is reported herein as a simple and efficient catalyst for the atom-economical synthesis of methyl ketones via Markovnikov-type alkyne hydration.
Zsanett Szécsényi +2 more
doaj +1 more source
Síntese de 1,3-diinos via acoplamento de acetilenos terminais catalisada por CuI sob irradiação de micro-ondas [PDF]
, 2015 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2015.No presente trabalho, desenvolveu-se uma nova metodologia sintética eficiente, simples e ...
Bettanin, Luana
core
Copper-Catalyzed Regioselective [4+2] Annulations between Diaryliodonium Salts and Alkynes: Design, Development, and Applications [PDF]
, 2022 Herein, a new reaction pattern of diaryliodonium salts was reported as novelty oxa-1,4-dipoles to undergo [4+2] cycloaddition reactions with alkynes.
Congdi, Zhang +5 more
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Molecules, 2022 A series of pyrazolo[1,5-a]pyridine-3-ylphosphonates were prepared with moderate to good yields by the oxidative [3+2]cycloaddition of 2-subtituted ethynylphosphonates with in situ generated pyridinium-N-imines and their annulated analogs.
Igor Philippov +3 more
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Photocatalytic Cycloaddition Reaction of Triarylphosphines with Alkynes Forming Cyclic Phosphonium Salts [PDF]
, 2021 Herein reported is a photocatalytic cycloaddition reaction of triarylphosphines with alkynes. Phosphonium salts of unique bicyclic structures are synthesized through a radical pathway under mild reaction conditions. The phosphonium salts are subjected to
Yusuke, Masuda +2 more
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Intermolecular Hydroaminoalkylation of Alkynes
Chemistry – A European Journal, 2021 AbstractIntermolecular hydroaminoalkylation reactions of alkynes with secondary amines, which selectively give access to allylic amines with E configuration of the alkene unit, are achieved in the presence of titanium catalysts. Successful reactions of symmetrically substituted diaryl‐ and dialkylalkynes as well as a terminal alkyne take place with N ...
Tobias Kaper +6 more
openaire +2 more sources
Electrochemical cyclization of alkynes to construct five-membered nitrogen-heterocyclic rings
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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The evolution of fundamental concepts in organic chemistry: Hydrocarbons in Iranian secondary school chemistry textbooks and their information content and importance based on shannon entropy [PDF]
پژوهش در آموزش شیمیBackground and Objective: This study examines the changes in the basic concepts of the chemistry of different branches of hydrocarbons (alkanes, alkenes, alkynes, and aromatics) in high school chemistry textbooks from 1971 to 2021.
Doost Mohammad Samiei Paghaleh +1 more
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Frontiers in Chemistry, 2023 Imines are valuable key compounds for synthesizing several nitrogen-containing molecules used in biological and industrial fields. They have been obtained, as highly regioselective Markovnikov products, by reacting several alkynes with arylamines in the ...
Marco Sirignano +6 more
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