Results 31 to 40 of about 220,378 (310)

Reactivity of 4,5-Dichlorophthalic Anhydride towards Thiosemicarbazide and Amines: Synthesis, Spectroscopic Analysis, and DFT Study

Molecules, 2022
The cyclic anhydrides are broadly employed in several fields, such as the chemical, plastic, agrochemical, and pharmaceutical industries. This study describes the chemical reactivity of 4,5-dichlorophthalic anhydride towards several nucleophiles ...
Hatem A. Abuelizz, Ahmed H. Bakheit, Mohamed Marzouk, Mohamed M. Abdellatif, Rashad Al-Salahi   +4 more
doaj   +1 more source

Exergy-based sustainability analysis of biogas upgrading using a hybrid solvent (imidazolium-based ionic liquid and aqueous monodiethanolamine) [PDF]

Biofuel Research Journal, 2023
Energy may be generated in large quantities from fossil fuels, but this comes with environmental concerns. Thus, renewable resources like biogas, comprising carbon dioxide and methane, should be used alone or in combination with fossil fuels to mitigate ...
Bilal Kazmi, Syed Imran Ali, Zahoor Ul Hussain Awan   +2 more
doaj   +1 more source

Pentafluoropropionic Anhydride Derivatization and GC-MS Analysis of Histamine, Agmatine, Putrescine, and Spermidine: Effects of Solvents and Starting Column Temperature

Molecules, 2023
Gas chromatography–mass spectrometry (GC-MS) is useful for the quantitative determination of the polyamines spermidine (SPD) and putrescine (PUT) and of the biogenic amine agmatine (AGM) in biological samples after derivatization.
Dimitrios Tsikas, Bibiana Beckmann, Svetlana Baskal, Gorig Brunner   +3 more
doaj   +1 more source

Benzamidomethylation with (Benzamidomethyl)triethylammonium Chloride. 2. A Simple Method for Benzamidomethylation of Thiols, Amines and Carboxylic Acids

Molecules, 2000
Thiols and amines were benzamidomethylated in water solution at room temperature with (benzamidomethyl)triethylammonium chloride (1) in the presence of a small quantity of triethylamine (pH>9).
Emil Popovski, Drazen Vikic-Topic, Ljiljana Klisarova   +2 more
doaj   +1 more source

Michael addition of aromatic and aliphatic amines to unsaturated olefines in the presence of TMSCl under solvent free conditions [PDF]

شیمی کاربردی روز, 2008
An operationally simple and highly fast protocol for TMSCl (10 mol%) catalyzed conjugate addition of aromatic and aliphatic amines derivatives to unsaturated carbonyl compounds in good to excellent yields has been developed.
Najmadin Azizi
doaj   +1 more source

Computationally aided design of defect-appended aliphatic amines for CO2 activation within UiO-66 [PDF]

, 2022
We report CO2 adsorption and subsequent formation of carbamic acid within defective UiO-66 functionalised with aliphatic amines. Periodic Density Functional Theory (DFT) calculations confirm the activation of CO2 with the aliphatic amines and the ...
Marco, Taddei, Davide, Tiana, Gerard, Pareras   +2 more
core   +2 more sources

New Synthetic Approaches to Multifunctional Phenazinium Salt Derivatives

Molecules, 2003
Two different approaches are offered for the synthesis under mild conditions of disubstituted phenazinium and benzo[a]phenazinium salts. Direct nucleophilic substitutions by primary and secondary amines in quaternary phenazinium salts containing an ...
Vladimir N. Silnikov, Inna Yu. Garipova
doaj   +1 more source

Bacterial metabolism of methylated amines and identification of novel methylotrophs in Movile Cave [PDF]

, 2015
Movile Cave, Romania, is an unusual underground ecosystem that has been sealed off from the outside world for several million years and is sustained by non-phototrophic carbon fixation. Methane and sulfur-oxidising bacteria are the main primary producers,
Alexandra M Hillebrand-Voiculescu, Myriam El Khawand, Colin Murrell, J, Murrell, J. Colin, Daniela Wischer, Antonia Johnston, Chen, Yin; id_orcid, Stephenson, Jason, El Khawand, Myriam, Murrell, J. C. (J. Colin), J Colin Murrell, Hillebrand-Voiculescu, Alexandra M, Hillebrand-Voiculescu, Alexandra M., Deepak Kumaresan, Wischer, Daniela, Chen, Yin, Jason Stephenson, Kumaresan, Deepak, Murrell, J Colin, Johnston, Antonia, Yin Chen   +20 more
core   +1 more source

Reações de organocatálise com aminas quirais: aspectos mecanísticos e aplicações em síntese orgânica Organocatalysis reactions with chiral amines: mechanistic aspects and use on organic synthesis

Química Nova, 2009
The philosophy of organocatalysis is based on the utilization of organic compounds to catalyze organic transformations without the intervention of metals.
Giovanni W. Amarante, Fernando Coelho
doaj   +1 more source

One-Pot Reactions of Triethyl Orthoformate with Amines

Reactions, 2023
One-pot reactions offer advantages like easy automation, higher product yields, minimal waste generation, operational simplicity, and thus reduced cost, time and energy.
Elina Marinho
doaj   +1 more source