Results 71 to 80 of about 7,268 (257)

Iridium‐Catalyzed Linear‐Selective sp3 C−H Alkylation of N‐Methylamides Using Alkenes Enabled by Diphosphite Ligands

Chemistry – A European Journal, EarlyView.
An iridium‐catalyzed linear‐selective sp3 C─H alkylation of N‐methylamides with alkenes is described. This method tolerates various N‐methylacetamide derivatives and has a broad alkene scope. Mechanistic studies were also conducted. Internal alkenes can also be used through in situ consecutive alkene isomerization.
Haluhi Takahashi, Takanori Shibata
wiley   +1 more source

One-pot synthesis of substituted pyrrolo[3,4-b]pyridine-4,5-diones based on the reaction of N-(1-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-2-oxo-2-arylethyl)acetamide with amines

Beilstein Journal of Organic Chemistry, 2019
The condensation of primary amines with N-(1-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-2-oxo-2-arylethyl)acetamides was explored. Thus, a previously unknown recyclization of the starting material was observed in acidic ethanol in the presence of an amine,
Valeriya G. Melekhina, Andrey N. Komogortsev, Boris V. Lichitsky, Vitaly S. Mityanov, Artem N. Fakhrutdinov, Arkady A. Dudinov, Vasily A. Migulin, Yulia V. Nelyubina, Elizaveta K. Melnikova, Michail M. Krayushkin   +9 more
doaj   +1 more source

Design and synthesis of some novel 2-(3-methyl-2-oxoquinoxalin-1(2H)-yl)-N-(4-(substituted)phenyl)acetamide derivatives for biological evaluation as anticonvulsant agents

Bulletin of Faculty of Pharmacy Cairo University, 2013
A new series of 2-(3-methyl-2-oxoquinoxalin-1(2H)-yl)-N-(4-substitutedphenyl)acetamides (2–15a–c) were designed and synthesized in order to evaluate their anticonvulsant activity.
Mohamed-Kamal Ibrahim, Ashraf A. Abd-Elrahman, Rezk R.A. Ayyad, Khaled El-Adl, Ahmed M. Mansour, Ibrahim H. Eissa   +5 more
doaj   +1 more source

Chromatography of wine [PDF]

, 2013
The objectives of the review are the collection, concise description and evaluation of the various chromatographic technologies applied for the separation and quantitative determination of macro- and microcomponents present in ...
Cserháti, Tibor, Szőgyi, Mária
core  

Photochemical aryl radical cyclizations to give (E)-3-Ylideneoxindoles [PDF]

, 2014
(E)-3-Ylideneoxindoles are prepared in methanol in reasonable to good yields, as adducts of photochemical 5-exo-trig of aryl radicals, in contrast to previously reported analogous radical cyclizations initiated by tris(trimethylsilyl)silane and azo ...
Aldabbagh, Fawaz, Allart-Simon, Ingrid, Gerard, Stephane, Gurry, Michael, McArdle, Patrick, Sapi, Janos   +5 more
core   +2 more sources

N-(3,4-Diethoxyphenyl)acetamide [PDF]

Acta Crystallographica Section E Structure Reports Online, 2009
In the title compound, C12H17NO3, the conformations of the N—H and C=O bonds areantito each other. In the crystal structure, N—H...O hydrogen-bond interactions help to establish the packing.
Pei-Hua Ma, Kai-Zhi Zhou, Mei-Lian Sun, Xiu-Mei Zhao, Xin Xiao   +4 more
openaire   +3 more sources

Cross‐Carboxylation of Methanol and Other Alcohols With CO2 Into Asymmetric Alkyl Methyl Carbonates Over a CeO2 Catalyst

Chemistry – A European Journal, EarlyView.
One‐pot synthesis of asymmetric organic carbonates from CO2, methanol, and other alcohols was demonstrated in the presence of CeO2 catalyst and 2‐cyanopyridine dehydrant. This reaction proceeded through two reaction pathways—direct route via cross‐carboxylation and indirect route via production of DMC and subsequent transesterification.
Yuan Li, Zechen Li, Mizuho Yabushita, Yoshinao Nakagawa, Keiichi Tomishige   +4 more
wiley   +1 more source

Thermische Umlagerung von Benzyl-1-alkinyl-äthern in Gegenwart von Aminen

CHIMIA, 1972
The benzyl-l-alkynyl ethers 1a and 1b in the presence of ammonia or diethylamine at 50 to 80° are transformed into the corresponding o-tolyl-acetamides 4 to 6 (scheme 1). This observation gives good evidence that benzyl-1-alkynyl ethers 1 rearrange by a
A. Wunderli, J. Zsindely, H.-J. Hansen, H. Schmid   +3 more
doaj   +1 more source

Determination of Hammett Pyridine 3-Aza and 4-Aza Replacement Constants by 1H NMR Studies of Amide Systems [PDF]

, 1993
Values for Hammett pyridine 3-aza and 4-aza replacement constants were obtained by correlation of the amide proton chemical shifts (in DMSO) of some N-(3-pyridyl)-and N-(4-pyridyl)-dichloronicotinamides, benzamides and acetamides with those of their N ...
Setliff, Frank L., Soman, Nikhil G., Toland, Alan D.   +2 more
core   +1 more source

Synthesizing polyethersulphone membranes with hybrid iron/nickel nanoparticles for dyes removal: An efficient biogenesis approach

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Industrial wastewater contamination by azo dyes poses a significant environmental challenge. This study reports the green synthesis of bimetallic iron/nickel (Fe/Ni) nanoparticles using moringa leaf extract, which acted as both a reducing and capping agent, and their incorporation into polyethersulphone (PES) membranes to produce eco‐friendly ...
Qusay A. Almajras, Ahmed K. Hassan, Dahiru Lawal, Mohammed Awad, Raed A. Al‐Juboori, Muhammad Irfan, Muhammad Rafiq, Qusay F. Alsalhy   +7 more
wiley   +1 more source