Results 21 to 30 of about 373,508 (305)
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 +3 more
doaj +1 more source
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 +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
Anaesthesia and Intensive Care, 1980 The autonomic nervous system may play an important role in tissue autoregulation as the neurohumoral transmission process has been shown to constitute the final common pathway by which the effects of many physiological and pharmacological substances are mediated.
openaire +2 more sources
Deactivation of gold(I) catalysts in the presence of thiols and amines – characterisation and catalysis [PDF]
, 2013 Thiols and amines, which are common heteroatom nucleophiles in gold-catalysed reactions, are known to dampen the reactivity of gold catalysts. In this article, the identity and activity of gold(I) catalysts in the presence of thiols and amines is ...
Green, Samantha L J +3 more
core +1 more source
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
Synthesis of Quinazoline and Quinazolinone Derivatives via Ligand-Promoted Ruthenium-Catalyzed Dehydrogenative and Deaminative Coupling Reaction of 2-Aminophenyl Ketones and 2-Aminobenzamides with Amines [PDF]
, 2019 The in situ formed ruthenium catalytic system ([Ru]/L) was found to be highly selective for the dehydrogenative coupling reaction of 2-aminophenyl ketones with amines to form quinazoline products.
Arachchige, Pandula T. Kirinde +1 more
core +3 more sources
On the kinetics between CO2 and alkanolamines both in aqueous and non-aqueous solutions—II. Tertiary amines [PDF]
, 1988 The reaction between CO2 and tertiary alkanolamines (MDEA, DMMEA, TREA) has been studied in aqueous solutions at various temperatures. Also the absorption of CO2 in a solution of MDEA in ethanol has been studied.
Swaaij, W.P.M. van, Versteeg, G.F.
core +3 more sources
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
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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