Results 31 to 40 of about 72,922 (314)

Copper-Catalyzed N-Arylation of Amides Using (S)-N-Methylpyrrolidine-2-carboxylate as the Ligand

Molecules, 2010
(S)-N-methylpyrrolidine-2-carboxylate, a derivative of natural L-proline, was found to be an efficient ligand for the copper-catalyzed Goldberg-type N-arylation of amides with aryl halides under mild conditions. A variety of N-arylamides were synthesized
Dong-Sheng Ma, Hua Zhang, Wei Wang, Lijuan Liu, Chaoyu Wang   +4 more
doaj   +1 more source

Dielectric Relaxation Studies of Hydrogen Bonded Complexes of Benzamide and Acetamide with Halogenated Phenols Using X-band Microwave Frequency

ASEAN Journal on Science and Technology for Development, 2021
At 308 K, using a 9.37 GHz dielectric relaxation setup, dielectric studies of hydrogen bonded complexes of benzamide and acetamide with 4-fluorophenol, 4-bromophenol, 4-chlorophenol, and 4-iodophenol in benzene were performed.
A. Aathif Basha, F. Liakath Ali Khan
doaj   +1 more source

Probing Reactivity with External Forces: The Case of Nitroacetamides in Water

Molecules, 2023
Many computational methods have been applied to interpret and predict changes in reactivity by slight modifications of a given molecular scaffold. We describe a novel and simple method based on approximate density-functional theory of valence electrons ...
Giovanni La Penna, Fabrizio Machetti
doaj   +1 more source

Mechanochemical Synthesis of Primary Amides

, 2021
CRUE-CSIC (Acuerdos Transformativos 2021)Ball milling of aromatic, heteroaromatic, vinylic, and aliphatic esters with ethanol and calcium nitride afforded the corresponding primary amides in a transformation that was compatible with a variety of ...
Gómez-Carpintero Jiménez, Jorge, Menéndez Ramos, José Carlos, Sánchez Cebrián, Juan Domingo, González Matilla, Juan Francisco   +3 more
core   +2 more sources

Thermochemical Properties and Regularities of Amides, Anilides, and Amidic Acids

Acta Chimica Slovenica, 2018
The thermodynamic properties of carbamide and its alkyl substituted were studied insufficiently. In this article, the enthalpies of combustion of ΔсН of some amides, anilides and amidic acids have been determined experimentally; their standard enthalpies of formation have been calculated.
Alma Kairlapovna Ryskaliyeva, Murat Ergalievich Baltabayev, Aigul Moldakhmetovna Zhubatova   +2 more
openaire   +4 more sources

Enantioselective synthesis of γ-chiral amides via copper-catalyzed reductive relay hydroaminocarbonylation

Nature Communications
Chiral amides are common and effective structural motifs found in many pharmaceuticals and biologically active molecules. Despite their importance, existing synthetic methods are predominantly employed for the synthesis of α-amides and β-amides.
Yang Yuan, Youcan Zhang, Xiao-Feng Wu
doaj   +1 more source

Multi-environment evaluations across ecological regions reveal climate and soil effects on amides contents in Chinese prickly ash peels (Zanthoxylum bungeanum Maxim.)

BMC Plant Biology, 2023
Background Environmental factors difference is the key factor for the difference in the production, transformation and accumulation of effective components in plants.
Tao Zheng, Hai-tao Zeng, Bing-yin Sun, Shu-ming Liu   +3 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Ammonothermal Synthesis and Crystal Structures of Diamminetriamidodizinc Chloride [Zn2(NH3)2(NH2)3]Cl and Diamminemonoamidozinc Bromide [Zn(NH3)2(NH2)]Br

Inorganics, 2016
The treatment of excess zinc in the presence of ammonium chloride under ammonothermal conditions of 873 K and 97 MPa leads to diamminetriamidodizinc chloride [Zn2(NH3)2(NH2)3]Cl with a two-dimensionally μ-amido-interconnected substructure.
Theresia M. M. Richter, Sabine Strobel, Nicolas S. A. Alt, Eberhard Schlücker, Rainer Niewa   +4 more
doaj   +1 more source

Origins of Chemoselectivity in the Ni-Catalyzed Biaryl and Pd-Catalyzed Acyl Suzuki–Miyaura Cross-Coupling of N‑Acetyl-Amides

, 2019
The mechanisms and origins of selectivity in the Pd-catalyzed nondecarbonylative and Ni-catalyzed decarbonylative Suzuki–Miyaura cross-coupling of N-acetyl-amides have been explored with density functional theory calculations.
Xiaojiao Jin, Yanfeng Dang (1489129), Riqing Li, Riqing Li (5143640), Xiaojiao Jin (8191746), Ning Zhao, Ning Zhao (84707), Hui Xu, Hui Xu (9203), Yanfeng Dang   +9 more
core   +1 more source