Results 311 to 320 of about 253,250 (328)

3d-Metal Catalyzed N- and C-Alkylation Reactions via Borrowing Hydrogen or Hydrogen Autotransfer.

Chemical Reviews, 2018
The conservation of our element resources is a fundamental challenge of mankind. The development of alcohol refunctionalization reactions is a possible fossil carbon conservation strategy since alcohols can be obtained from indigestible and abundantly ...
T. Irrgang, R. Kempe
semanticscholar   +1 more source

Polarity Umpolung Strategy for the Radical Alkylation of Alkenes.

Angewandte Chemie, 2020
Free radical-mediated alkylation of general alkenes is a challenging and largely unmet goal. Herein, we disclose a conceptually novel "polarity umpolung" strategy for radical alkylation of alkenes using a portfolio of easily-accessed, dual-function ...
Jige Liu, Shuo Wu, Jiajia Yu, Chenxi Lu, Zhen Wu, Xinxin Wu, Xiao-song Xue, Chen Zhu   +7 more
semanticscholar   +1 more source

Histidine-Specific Peptide Modification via Visible-Light-Promoted C-H Alkylation.

Journal of the American Chemical Society, 2019
Histidine (His) carries a unique heteroaromatic imidazole side chain and plays irreplaceable functional roles in peptides and proteins. Existing strategies for site-selective histidine modification predominantly rely on the N-substitution reactions of ...
Xiaoping Chen, Farong Ye, Xiaosheng Luo, Xueyi Liu, Jie Zhao, Siyao Wang, Qingqing Zhou, Gong Chen, Ping Wang   +8 more
semanticscholar   +1 more source

Visible-Light-Driven N-Heterocyclic Carbene-catalyzed γ- and ε-Alkylation with Alkyl Radicals.

Angewandte Chemie, 2019
The merging of photoredox catalysis and N-heterocyclic carbene (NHC) catalysis for γ- and ε-alkylation of enals with alkyl radicals was developed.
L. Dai, Zi‐Hao Xia, Yuan-Yuan Gao, Zhong-Hua Gao, Song Ye   +4 more
semanticscholar   +1 more source

Visible-Light-Initiated Decarboxylative Alkylation of Quinoxalin-2(1H)-ones with Phenyliodine(III) Dicarboxylates in Recyclable Ruthenium(II) Catalytic System

ACS Sustainable Chemistry and Engineering, 2019
A efficient and sustainable approach for the synthesis of 3-alkylquinoxalin-2(1H)-ones has been developed through visible-light-mediated decarboxylative alkylation of quinoxalin-2(1H)-ones with phenyliodine(III) dicarboxylates.
Long-Yong Xie, Li-Lin Jiang, Jia-Xi Tan, Yi Wang, Xiang-Qin Xu, Bo Zhang, Zhong Cao, Wei‐Min He   +7 more
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The Combination of Benzaldehyde and Nickel-Catalyzed Photoredox C(sp3 )-H Alkylation/Arylation.

Angewandte Chemie, 2019
Herein we report a highly selective photoredox C(sp3 )-H alkylation/arylation of ethers through the combination of a photo-organocatalyst (benzaldehyde) and a transition-metal catalyst (nickel).
Lumin Zhang, Xiaojia Si, Yangyang Yang, M. Zimmer, Sina Witzel, K. Sekine, M. Rudolph, A. Hashmi   +7 more
semanticscholar   +1 more source

Enantioselective Allylic Alkylation with 4-Alkyl-1,4-dihydro-pyridines Enabled by Photoredox/Palladium Cocatalysis.

Journal of the American Chemical Society, 2018
Highly regio- and enantioselective allylic alkylation has been achieved enabled by the merger of photoredox and palladium catalysis. In this dual catalytic process, alkyl radicals generated from 4-alkyl-1,4-dihydropyridines act as the coupling partners ...
Honghao Zhang, Jia-Jia Zhao, Shouyun Yu
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Enantioconvergent Cu-catalysed N-alkylation of aliphatic amines

Nature, 2023
Ji-jun Chen, Jia-Heng Fang, Xuan-Yi Du, Jia-Yong Zhang, Jun-Qian Bian, Fu-Li Wang, Cheng Luan, Wei-Long Liu, Ji-Ren Liu, Xiao-Yang Dong, Zhong-Liang Li, Qiangshuai Gu, Zhe Dong, Xin‐Yuan Liu   +13 more
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Visible-Light-Enabled Ruthenium-Catalyzed meta-C-H Alkylation at Room Temperature.

Angewandte Chemie, 2019
Visible-light-induced ruthenium catalysis has enabled remote C-H alkylations with excellent levels of position control under exceedingly mild conditions at room temperature.
Parthasarathy Gandeepan, Julian Koeller, Korkit Korvorapun, J. Mohr, L. Ackermann   +4 more
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Manganese-Catalyzed β-Alkylation of Secondary Alcohols with Primary Alcohols under Phosphine-Free Conditions

ACS Catalysis, 2018
Manganese(I) complexes bearing a pyridyl-supported pyrazolyl-imidazolyl ligand efficiently catalyzed the direct β-alkylation of secondary alcohols with primary alcohols under phosphine-free conditions.
Tingting Liu, Liandi Wang, Kaikai Wu, Zhengkun Yu   +3 more
semanticscholar   +1 more source