Results 31 to 40 of about 47,675 (279)

Iron-catalyzed carboazidation of alkenes and alkynes

Nature Communications, 2019
Carboazidation of alkenes and alkynes holds the promise to construct valuable, functionalized molecules. Here, the authors report a general and efficient iron-catalyzed carboazidation of both alkenes and alkynes enabled by t-butyl perbenzoate.
Haigen Xiong, Nagarajan Ramkumar, Mong-Feng Chiou, Wujun Jian, Yajun Li, Ji-Hu Su, Xinhao Zhang, Hongli Bao   +7 more
doaj   +1 more source

Synthesis of N-perfluoroalkyl-3,4-disubstituted pyrroles by rhodium-catalyzed transannulation of N-fluoroalkyl-1,2,3-triazoles with terminal alkynes

Beilstein Journal of Organic Chemistry, 2021
The rhodium-catalyzed transannulation of N-perfluoroalkyl-1,2,3-triazoles with aromatic and aliphatic terminal alkynes under microwave heating conditions afforded N-perfluoroalkyl-3,4-disubstituted pyrroles (major products) and N-fluoroalkyl-2,4 ...
Olga Bakhanovich, Viktor Khutorianskyi, Vladimir Motornov, Petr Beier   +3 more
doaj   +1 more source

Catalytic, Z-Selective, Semi-Hydrogenation of Alkynes with a Zinc–Anilide Complex [PDF]

, 2022
The reversible activation of dihydrogen with a molecular zinc anilide complex is reported. The mechanism of this reaction has been probed through stoichiometric experiments and DFT calculations. The combined evidence suggests that H2 activation occurs by
Mark, Crimmin, Andrew , White, Ian, Casely, Damian, Grainger, Greg, Baker, Mark Crimmin, Damian Grainger, Greg Baker, Andrew White, Ian Casely   +9 more
core   +2 more sources

Design, development and applications of copper-catalyzed regioselective (4 + 2) annulations between diaryliodonium salts and alkynes

Communications Chemistry, 2022
Intermolecular (4 + 2) cycloaddition with alkynes is a powerful approach to construct isocoumarin moieties, however, regioselectivity remains challenging for the transition metal-catalyzed approach.
Weilin Wang, Junrui Zhou, Chao Wang, Congdi Zhang, Xiao-Qian Zhang, Youliang Wang   +5 more
doaj   +1 more source

Gold- and Iodine-Mediated Internal Oxygen Transfer of Nitrone- and Sulfoxide-Functionalized Alkynes

, 2011
Gold- and Iodine-Mediated Internal Oxygen Transfer of Nitrone- and Sulfoxide-Functionalized AlkynesIntramolecular oxygen transfer of nitrone- and sulfoxide-alkynes was achieved using a catalytic amount of Au(I) and a stoichiometric amount of iodine.
AiqunJia, 李兴伟, Song, Guoyong, Chen, Dan, Jia, Aiqun, Li, Xingwei   +5 more
core   +1 more source

Functionalization of remote C(sp3)-H bonds enabled by copper-catalyzed coupling of O-acyloximes with terminal alkynes

Nature Communications, 2020
Sonogashira cross-coupling is a powerful strategy to prepare functionalized internal alkynes. Here, the authors report a domino sequence for the generation of γ-/δ-alkynyl nitriles and γ-alkynyl ketones from the coupling of terminal alkynes with O ...
Zhaodong Li, Rubén O. Torres-Ochoa, Qian Wang, Jieping Zhu   +3 more
doaj   +1 more source

Electrophilic Additions of Positive Iodine to Alkynes through an Iodonium Mechanism [PDF]

, 1990
Alkynes react with bis(pyridine)iodonium(I) tetrafluoroborate (1) and nucleophiles (CH3COOH, HCOOH, Cl-, pyridine, Br-, I-) to give 1,2-iodofunctionalized alkenes.
Rodríguez, M.A. [0000-0003-0123-9905], Campos, P.J. [0000-0002-8917-0318], Barluenga, J. [0000-0002-6474-7782]   +2 more
core   +1 more source

Internal lattice oxygen sites invert product selectivity in electrocatalytic alkyne hydrogenation over copper catalysts

Nature Communications
Copper-based catalysts exhibit excellent performance of electrocatalytic alkynes hydrogenation, especially for the selective alkynes hydrogenation toward alkenes.
Mengyu Li, Yimin Jiang, Wei Chen, Yucheng Huang, Yingrui Lu, Leitao Xu, Shengkai Li, Yandong Wu, Zhongcheng Xia, Ruiqi Wang, Shuangyin Wang, Yuqin Zou   +11 more
doaj   +1 more source

QUANTITATIVE CORRELATION «STRUCTURE OF ALKYNES C2H2-C9H16 – THE HEAT OF VAPORIZATION » [PDF]

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2013
For series alkynes CnH2n-2 based on group additive method (which based on the first environment of atoms), one obtained 8-constant additive scheme of calculation of their physical and chemical properties.
V.V. Grebeshkov, V.M. Smolyakov
doaj  

Modulation of metal species as control point for Ni-catalyzed stereodivergent semihydrogenation of alkynes with water

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, Yuhui Ao, Zhiming Li, Chunhui Liu, Jinbo Zhao, Wenyu Gao, Xuemeng Li, Hui Wang, Yongsheng Liu, Yu Liu   +9 more
doaj   +1 more source