Results 21 to 30 of about 37,121 (253)

Facile and green synthesis of 3,5-disubstituted isoxazoles using doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as an efficient nano-catalyst under ultrasonic irradiation [PDF]

شیمی کاربردی روز, 2019
In the present research, doped nano-sized copper(I) oxide (Cu2O) on melamine–formaldehyde resin as a heterogeneous and efficient nano-catalyst has been employed for green and mild synthesis of 3,5-disubstituted isoxazoles under ultrasonic irradiation. In
Somayeh Behrouz
doaj   +1 more source

(7R)-6-Methyl-7,9-bis(prop-2-yn-1-yl)-7H,8H,9H-1,2,4-triazolo[4,3-b][1,2,4]triazepin-8-one

IUCrData, 2016
In the title molecule, C12H11N5O, the seven-membered ring derived from triazepine adopts a boat conformation. Intermolecular C—H...N hydrogen bonds and C—H...π-ring interactions form columns of molecules parallel to the a axis, which are further ...
Youness El Bakri, Abdallah Harmaoui, Jihad Sebhaoui, Youssef Ramli, El Mokhtar Essassi, Joel T. Mague   +5 more
doaj   +1 more source

Facile Photochemical/Thermal Assisted Hydration of Alkynes Catalysed under Aqueous Media by a Chalcogen Stabilized, Robust, Economical, and Reusable Fe₃Se₂(CO)₉ Cluster

Organics, 2023
In this report, the catalytic potential of chalcogen-stabilized iron carbonyl clusters [Fe3E2(CO)9 (E = S, Se, Te)] for the photolytic hydration of alkynes has been explored.
Munsaf Ali, Avinash K. Srivastava, Nitinkumar Satyadev Upadhyay, Naveen Satrawala, Raj K. Joshi   +4 more
doaj   +1 more source

Sequential Au(I)-catalyzed reaction of water with o-acetylenyl-substituted phenyldiazoacetates

Beilstein Journal of Organic Chemistry, 2011
The gold(I)-catalyzed reaction of water with o-acetylenyl-substituted phenyldiazoacetates provides 1H-isochromene derivatives in good yields. The reaction follows a catalytic sequence of gold carbene formation/water O–H insertion/alcohol-alkyne ...
Lei Zhou, Yizhou Liu, Yan Zhang, Jianbo Wang   +3 more
doaj   +1 more source

Synthesis of Calix[4]arene Appended Lactosylated G1 and Galacto­sylated G2 Generation Glycodendrimers using a ‘CuAAC’ Click Approach

SynOpen, 2023
A modular and highly reliable click approach is applied for the expeditious synthesis of lactose- and galactose-coated calixarene-cored G1 and G2 generation glycodendrimers, respectively.
Sunil Kumar, Mangal S. Yadav, Sumit K. Singh, Sanchayita Rajkhowa, Vinod K. Tiwari   +4 more
doaj   +1 more source

Gold(I)-catalyzed hydroarylation reaction of aryl (3-iodoprop-2-yn-1-yl) ethers: synthesis of 3-iodo-2H-chromene derivatives

Beilstein Journal of Organic Chemistry, 2013
An efficient entry to the preparation of elusive 4-unsubstituted-3-iodo-2H-chromenes has been accomplished as result of a catalytic cyclization. Thus, upon exposition of [(3-iodoprop-2-yn-1-yl)oxy]arenes to IPrAuNTf2 (3 mol %), in 1,4-dioxane at 100 °C ...
Pablo Morán-Poladura, Eduardo Rubio, José M. González   +2 more
doaj   +1 more source

Alkyne lipids as substrates for click chemistry-based in vitro enzymatic assays

Journal of Lipid Research, 2013
Click chemistry is evolving as a powerful tool in biological applications because it allows the sensitive and specific detection of compounds with alkyne or azido groups.
Anne Gaebler, Robin Milan, Leon Straub, Dominik Hoelper, Lars Kuerschner, Christoph Thiele   +5 more
doaj   +1 more source

Synthesis of Polar Aromatic Substituted Terminal Alkynes from Propargyl Amine

Molbank, 2021
A series of small molecules containing polar aromatic substituents and alkynes have been synthesized. One–pot preparations of polar aromatic molecules containing an alkynyl imine and alkynyl amide are reported.
Surya R. Banks, Kyung Min Yoo, Mark E. Welker   +2 more
doaj   +1 more source

Zirconoarylation of alkynes through p-chloranil-promoted reductive elimination of arylzirconates

Beilstein Journal of Organic Chemistry, 2014
A novel method for the zirconoarylation of alkynes was developed. TCQ-promoted reductive elimination of arylzirconate [LiCp2ZrAr(RC≡CR)], which was prepared by the reaction of zirconocene–alkyne complexes with aryllithium compounds, afforded ...
Xiaoyu Yan, Chao Chen, Chanjuan Xi
doaj   +1 more source

Structural Determinants of Alkyne Reactivity in Copper-Catalyzed Azide-Alkyne Cycloadditions

Molecules, 2016
This work represents our initial effort in identifying azide/alkyne pairs for optimal reactivity in copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions.
Xiaoguang Zhang, Peiye Liu, Lei Zhu
doaj   +1 more source