Results 31 to 40 of about 45,374 (213)

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
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The Effect of N-Donor Ligands on the Reaction of Ruthenium Hydrides with 1-Alkynes

, 2016
Neutral ruthenium hydrides Ru(CO)ClH(L)(PPh3)2 bearing one N-donor ligand react with 1-alkynes at 23 °C to yield neutral alkenyl complexes Ru(CO)Cl(CHCHR)(L)(PPh3)2.
Antonio M. Echavarren (1299936), Amelia Santos (3084375), Javier López (638357), Juan J. González (3039825), Pilar Tinoco (3084378), Amalia Galán (3084381)   +5 more
core   +1 more source

Synthesis of 1,4-Disubstituted Mono and Bis-triazolocarbo-acyclonucleoside Analogues of 9-(4-Hydroxybutyl)guanine by Cu(I)-Catalyzed Click Azide-Alkyne Cycloaddition [PDF]

, 2011
A series of novel mono-1,2,3-triazole and bis-1,2,3-triazole acyclonucleoside analogues of 9-(4-hydroxybutyl)guanine was prepared via copper(I)-catalyzed 1,3-dipolar cycloaddition of N-9 propargylpurine, N-1-propargylpyrimidines/as-triazine with the ...
Krim, Jamal, Taourirte, Mohamed, Engels, Joachim W., Moha Taourirte, Jamal Krim, Joachim W. Engels   +5 more
core   +1 more source

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
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Cascade Transformations of 1-R-Ethynyl-9,10-anthraquinones with Amidines: Expanding Access to Isoaporphinoid Alkaloids

Molecules, 2021
The interaction of acetamidine and phenylamidine with peri-R-ethynyl-9,10-anthraquinones in refluxing n-butanol leads to the formation of cascade transformations products: addition/elimination/cyclization―2-R-7H-dibenzo[de,h]quinolin-7-ones and(or) 2-R-3-
Sergey Francevich Vasilevsky, Ol’ga Leonidovna Krivenko, Irina Vasilievna Sorokina, Dmitry Sergeevich Baev, Tatyana Genrikhovna Tolstikova, Igor V. Alabugin   +5 more
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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
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A Synthetic Route to Chiral Benzo-Fused N‑Heterocycles via Sequential Intramolecular Hydroamination and Asymmetric Hydrogenation of Anilino-Alkynes

, 2019
An efficient sequential intramolecular hydroamination/asymmetric hydrogenation reaction under catalysis of a single chiral ruthenium complex or a binary system consisting of achiral gold complex and chiral ruthenium complex has been reported.
Faju Li (6651143), Jiahong Han (6651146), Qing-Hua Fan (1500904), Yan-Mei He (2036539), Cong Xu (203537), Yu Feng (445691)   +5 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
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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
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