Results 11 to 20 of about 36,889 (205)

Bidentate Lewis Acids Derived from o‐Diethynylbenzene with Group 13 and 14 Functions

ChemistryOpen, 2021
Starting from 1,2‐diethynylbenzene, a series of bidentate Lewis acids was prepared by means of hydrometalations, in particular hydrosilylation, hydroboration, hydroalumination and terminal metalation based on group 13 and 14 elements.
Jens Rudlof, Niklas Aders, Dr. Jan‐Hendrik Lamm, Beate Neumann, Dr. Hans‐Georg Stammler, Prof. Dr. Norbert W. Mitzel   +5 more
doaj   +1 more source

Crystal structure and Hirshfeld surface analysis of 1-benzyl-3-(prop-2-yn-1-yl)-2,3-dihydro-1H-1,3-benzodiazol-2-one

Acta Crystallographica Section E: Crystallographic Communications, 2018
The title compound, C17H14N2O, is built up from the planar benzodiazole unit linked to the benzyl and propynyl substituents. The substituents are rotated significantly out of the benzodiazole plane, where the benzyl group is inclined by 68.91 (7)° to the
Asmaa Saber, Nada Kheira Sebbar, Tuncer Hökelek, Mohamed El hafi, Joel T. Mague, El Mokhtar Essassi   +5 more
doaj   +1 more source

Palladium-catalyzed cross coupling reactions of 4-bromo-6H-1,2-oxazines

Beilstein Journal of Organic Chemistry, 2009
A number of 4-aryl- and 4-alkynyl-substituted 6H-1,2-oxazines 8 and 9 have been prepared in good yields via cross coupling reactions of halogenated precursors 2, which in turn are easily accessible by bromination of 6H-1,2-oxazines 1. Lewis-acid promoted
Reinhold Zimmer, Elmar Schmidt, Michal Andrä, Marcel-Antoine Duhs, Igor Linder, Hans-Ulrich Reissig   +5 more
doaj   +1 more source

Recent developments in gold-catalyzed cycloaddition reactions

Beilstein Journal of Organic Chemistry, 2011
In the last years there have been extraordinary advances in the development of gold-catalyzed cycloaddition processes. In this review we will summarize some of the most remarkable examples, and present the mechanistic rational underlying the ...
Fernando López, José L. Mascareñas
doaj   +1 more source

Chemical Architecture and Applications of Nucleic Acid Derivatives Containing 1,2,3-Triazole Functionalities Synthesized via Click Chemistry

Molecules, 2012
There is considerable attention directed at chemically modifying nucleic acids with robust functional groups in order to alter their properties. Since the breakthrough of copper-assisted azide-alkyne cycloadditions (CuAAC), there have been several ...
Wei Gong, Tim Efthymiou, Jean-Paul Desaulniers   +2 more
doaj   +1 more source

Copper-azide nanoparticle: a ‘catalyst-cum-reagent’ for the designing of 5-alkynyl 1,4-disubstituted triazoles

Scientific Reports, 2020
A single pot, wet chemical route has been applied for the synthesis of polymer supported copper azide, CuN3, nanoparticles (CANP). The hybrid system was used as ‘catalyst-cum-reagent’ for the azide-alkyne cyclo-addition reaction to construct triazole ...
Debkumar Nandi, Venkata K. Perla, Sarit K. Ghosh, Charmaine Arderne, Kaushik Mallick   +4 more
doaj   +1 more source

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