Results 261 to 270 of about 121,575 (333)

Selective Transfer Semihydrogenation of Alkynes with H2O (D2O) as the H (D) Source over a Pd-P Cathode.

Angewandte Chemie, 2020
Developing a facile controllable avenue to selective semihydrogenation of alkynes to alkenes with a defined configuration using a cheap and safe hydrogen donor is highly desirable, but remains a big challenge.
Yongmeng Wu, Cuibo Liu, Changhong Wang, Siyu Lu, Bin Zhang   +4 more
semanticscholar   +1 more source

Copper-Catalyzed Asymmetric Radical 1,2-Carboalkynylation of Alkenes with Alkyl Halides and Terminal Alkynes.

Journal of the American Chemical Society, 2020
A copper-catalyzed intermolecular three-component asymmetric radical 1,2-carboalkynylation of alkenes has been developed, providing straightforward access to diverse chiral alkynes from readily available alkyl halides and terminal alkynes.
Xiao-Yang Dong, Jiang Cheng, Yu-Feng Zhang, Zhong-Liang Li, Tian‐Ya Zhan, Ji-Jun Chen, Fu-Li Wang, Ning-Yuan Yang, L. Ye, Qiangshuai Gu, Xin‐Yuan Liu   +10 more
semanticscholar   +1 more source

Photoinduced Copper-Catalyzed Asymmetric Decarboxylative Alkynylation with Terminal Alkynes.

Angewandte Chemie, 2020
We describe a photoinduced copper-catalyzed asymmetric radical decarboxylative alkynylation of bench-stable N -hydroxyphthalimide(NHP)-type esters of racemic alkyl carboxylic acids with terminal alkynes, providing a flexible platform for the construction
Haidong Xia, Zhong-Liang Li, Qiangshuai Gu, Xiao-Yang Dong, Jia-Heng Fang, Xuan-Yi Du, Li-Lei Wang, Xin‐Yuan Liu   +7 more
semanticscholar   +1 more source

Alkyne metathesis

Chemical Communications, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Fürstner, A., Davies, P.
openaire   +3 more sources

Silver-Catalyzed Activation of Terminal Alkynes for Synthesizing Nitrogen-Containing Molecules.

Accounts of Chemical Research, 2020
Alkynes are one of the most abundant chemicals in organic chemistry, and therefore the development of catalytic reactions to transform alkynes into other useful functionalities is of great value.
Paramasivam Sivaguru, Shanshan Cao, Kaki Raveendra Babu, X. Bi   +3 more
semanticscholar   +1 more source

Allenation of Terminal Alkynes with Aldehydes and Ketones.

Accounts of Chemical Research, 2019
So far, over 150 natural products and pharmaceuticals containing an allene moiety have been identified. During the last two decades, allenes have also been demonstrated as synthetically versatile starting materials in organic synthesis.
Xin Huang, Shengming Ma
semanticscholar   +1 more source

Rh(III)-Catalyzed Atroposelective Synthesis of Biaryls via C-H Activation and Intermolecular Coupling with Sterically Hindered Alkynes.

Angewandte Chemie, 2020
Chiral biaryls make important synthetic building blocks and privileged ligands for asymmetric catalysis. Reported herein is atroposelective synthesis of biaryl NH isoquinolones via Rh(III)-catalyzed C-H activation of benzamides and intermolecular [4+2 ...
Fen Wang, Z. Qi, Yuxia Zhao, Shuailei Zhai, G. Zheng, Ruijie Mi, Zhiyan Huang, Xiaolin Zhu, Xiaoming He, Xingwei Li   +9 more
semanticscholar   +1 more source

Electroremovable Traceless Hydrazides for Cobalt-Catalyzed Electro-Oxidative C-H/N-H Activation with Internal Alkynes.

Journal of the American Chemical Society, 2018
Electrochemical oxidative C-H/N-H activations have been accomplished with a versatile cobalt catalyst in terms of [4 + 2] annulations of internal alkynes.
Ruhuai Mei, Nicolas Sauermann, João C. A. Oliveira, L. Ackermann   +3 more
semanticscholar   +1 more source

Alkynes in Organocatalysis

Asian Journal of Organic Chemistry, 2014
AbstractIn this Focus Review, a selection of organocatalyzed reactions in which alkynes have been used are presented. Catalysis by tertiary and secondary amines, by phase‐transfer catalysis, by phosphines and carbenes, as well as bifunctional and multiple catalysis are discussed.
SALVIO, RICCARDO, MOLITERNO, MAURO, BELLA, Marco   +2 more
openaire   +3 more sources

Magnesium-Catalyzed Hydroboration of Terminal and Internal Alkynes.

Angewandte Chemie, 2019
A magnesium-catalyzed hydroboration of alkynes providing good yields and selectivities for a wide range of terminal and symmetrical and unsymmetrical internal alkynes has been developed.
Marc Magre, Bholanath Maity, Alban Falconnet, L. Cavallo, M. Rueping   +4 more
semanticscholar   +1 more source