Results 261 to 270 of about 4,159,820 (313)

Correction to "Metal-Free Catalysis Triarylborane-Catalyzed Alkenylation Reactions of Aryl Esters with Diazo Compounds". [PDF]

Angew Chem Int Ed Engl
europepmc   +1 more source

Metal-Free Dental Implants: A Narrative Review of Zirconia and Emerging Alternative Materials.

J Pharm Bioallied Sci
Chappa N, Valaparla J, Gadde H, Venkatapathi A, Sree HV, Srija SC, Parthiban S.   +6 more
europepmc   +1 more source

Metal-Free Trifluoromethylation of Indazoles [PDF]

The Journal of Organic Chemistry, 2018
A simple and efficient tert-butyl hydroperoxide-mediated direct trifluoromethylation of indazoles using sodium trifluoromethanesulfinate has been developed under metal-free conditions. A library of trifluoromethylated products with broad functionalities has been synthesized with moderate to good yields.
Payel Ghosh, Susmita Mondal, Alakananda Hajra   +2 more
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Synthesis of a Metal-Free Texaphyrin

Organic Letters, 2001
The synthesis of a metal-free form of texaphyrin, an aromatic porphyrin-like macrocycle, is described. Previously, texaphyrins could only be obtained reproducibly in the form of metal complexes. Using ferrocenium cation as the oxidizing agent and starting with a reduced porphyrinogen-like nonaromatic form of texaphyrin, we isolated, in good yield, the ...
S, Hannah, V M, Lynch, N, Gerasimchuk, D, Magda, J L, Sessler   +4 more
openaire   +2 more sources

Metal‐Free Deoxygenation of Carbohydrates

Angewandte Chemie International Edition, 2014
AbstractThe conversion of readily available cellulosic biomass to valuable feedstocks and fuels is an attrative goal but a challenging transformation that requires the cleavage of multiple nonactivated CO bonds. Herein, the Lewis acid trispentafluorophenylborane (B(C6F5)3) is shown to catalyze the metal‐free hydrosilylative reduction of ...
Laura L, Adduci, Matthew P, McLaughlin, Trandon A, Bender, Jennifer J, Becker, Michel R, Gagné   +4 more
openaire   +2 more sources

Metal-free bioconjugation reactions

Drug Discovery Today: Technologies, 2013
The recent strategy to apply chemical reactions to address fundamental biological questions has led to the emergence of entirely new conjugation reactions that are fast and irreversible, yet so mild and selective that they can be performed even in living cells or organisms.
Berkel, S.S. van, Delft, F.L. van
openaire   +3 more sources

Metal‐Free Aryltrifluoromethylation of Activated Alkenes

Angewandte Chemie International Edition, 2013
Metal-free: The first metal-free aryltrifluoromethylation of activated alkenes has been developed. With this method, trifluoromethylated isoquinolinediones, spirobicycles, oxindoles, and α-aryl-β-trifluoromethylamides were obtained with high control of the regioselectivity.
Kong, Wangqing, Casimiro, Maria, Fuentes, Noelia, Merino, Estíbaliz, Nevado, Cristina   +4 more
openaire   +4 more sources

Metal-free hydroalkoxylation of ynesulfonamides with esters

Organic & Biomolecular Chemistry, 2021
A TMSOTf-catalyzed hydroalkoxylation of ynesulfonamides with esters is described for the efficient synthesis of alkoxy-substituted enamides with high stereoselectivity.
Erhui Gao, Cheng Peng, Jingyi Zhang, Xiao-Na Wang, Junbiao Chang   +4 more
openaire   +2 more sources

Carbocatalysis: The State of “Metal‐Free” Catalysis

Chemistry – A European Journal, 2015
AbstractThe rise in global demand for crucial chemical compounds has driven immense research in the fundamental science of catalysis. Graphene and its derivatives (chemically modified graphene, CMGs) have recently emerged as a new class of heterogeneous catalyst that promises economically viable and greener routes to these compounds.
Chua, Chun Kiang, Pumera, Martin
openaire   +3 more sources

Metal-free photocatalysts for hydrogen evolution

Chemical Society Reviews, 2020
This article provides a comprehensive review of the latest progress, challenges and recommended future research related to metal-free photocatalysts for hydrogen productionviawater-splitting.
Mohammad Ziaur Rahman, Md Golam Kibria, Charles Buddie Mullins   +2 more
openaire   +2 more sources