The Role of Iminium-Enamine Species in the Toxication and Detoxication of Cyclic Tertiary Amines

1997 ◽  
Author(s):  
Lawrence M. Sayre ◽  
David A. Engelhart ◽  
Durgesh V. Nadkarni ◽  
M. K. Manoj Babu ◽  
Ann Marie Flammang ◽  
...  
Keyword(s):  
Tertiary Amines

ChemInform Abstract: Michael Addition of N-Unprotected 2-Oxindoles to Nitrostyrene Catalyzed by Bifunctional Tertiary Amines: Crucial Role of Dispersion Interactions.

ChemInform ◽  
2014 ◽  
Vol 45 (40) ◽  
pp. no-no
Author(s):  
Christoph Reiter ◽  
Sonia Lopez-Molina ◽  
Bernhard Schmid ◽  
Christian Neiss ◽  
Andreas Goerling ◽  
...  
Keyword(s):  
Michael Addition ◽  
Crucial Role ◽  
Tertiary Amines ◽  
Dispersion Interactions

Role of tertiary amines in enhancing trihalomethane and haloacetic acid formation during chlorination of aromatic compounds and a natural organic matter extract

2018 ◽  
Vol 4 (5) ◽  
pp. 663-679 ◽  
Author(s):  
Kun Huang ◽  
Amisha D. Shah
Keyword(s):  
Organic Matter ◽  
Organic Compound ◽  
Natural Organic Matter ◽  
Aromatic Compounds ◽  
Acid Formation ◽  
Tertiary Amines ◽  
Haloacetic Acid ◽  
Anthropogenic Inputs

Tertiary amines are prevalent in waters due to anthropogenic inputs and are known to enhance organic compound degradation while increasing disinfection by-product (DBP) formation, via the strong chlorinating agent, R3N–Cl+.

Role of Cation in Enhancing the Conversion of the Alzheimer’s Peptide into Amyloid Fibrils Using Protic Ionic Liquids

2012 ◽  
Vol 65 (11) ◽  
pp. 1502 ◽  
Author(s):  
Natalie Debeljuh ◽  
Swapna Varghese ◽  
Colin J. Barrow ◽  
Nolene Byrne
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Primary Amine ◽  
Amyloid Fibrils ◽  
Tertiary Amines ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
The Difference ◽  
The Impact

We report on the impact of changes in the protic ionic liquid (pIL) cation on the fibrilisation kinetics and the conversion of the Aβ 16–22 from monomers to amyloid fibrils. When we compare the use of primary, secondary, and tertiary amines we find that the primary amine results in the greatest conversion into amyloid fibrils. We show that the pIL is directly interacting with the peptide and this likely drives the difference in conversion and kinetics observed.

scholarly journals Catalyst Deactivation Reactions: The Role of Tertiary Amines Revisited

2011 ◽  
Vol 30 (1) ◽  
pp. 92-99 ◽  
Author(s):  
Elena Novarino ◽  
Itzel Guerrero Rios ◽  
Siebe van der Veer ◽  
Auke Meetsma ◽  
Bart Hessen ◽  
...  
Keyword(s):  
Catalyst Deactivation ◽  
Tertiary Amines

Role of Linkers in Tertiary Amines That Mediate or Catalyze 1,3,5-Triazine-Based Amide-Forming Reactions

2014 ◽  
Vol 79 (8) ◽  
pp. 3709-3714 ◽  
Author(s):  
Masanori Kitamura ◽  
Fumitaka Kawasaki ◽  
Kouichi Ogawa ◽  
Shuichi Nakanishi ◽  
Hiroyuki Tanaka ◽  
...  
Keyword(s):  
Tertiary Amines

Thermal stability of ammonium salts as compatibilizers in polymer/layered silicate nanocomposites

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Maurizio Galimberti ◽  
Marco Martino ◽  
Monica Guenzi ◽  
Gabriella Leonardi ◽  
Attilio Citterio
Keyword(s):  
Thermal Stability ◽  
Layered Silicate ◽  
Ammonium Cation ◽  
Ammonium Salts ◽  
Chloride Salt ◽  
Tertiary Amines ◽  
Silicate Nanocomposites ◽  
Thermal Stability Of ◽  
Isoprene Rubber

AbstractThermal stability of alkyl and arylalkyl quaternary ammonium cation (onium) in starting chloride salt, in organoclay obtained after exchange with montmorillonite (MMT) and after mixing of the organoclay with isoprene rubber was examined using conventional TGA and by mass spectrometry pyrolysis/GC-MS. Degradation was observed to occur at T ≥ 170 °C for organoclays and the main volatile compounds were identified as tertiary amines, chloroalkanes and alkenes. Mechanisms for their formation are proposed and the role of residual onium chloride and basic centers of layered silicate is discussed.

Sterically hindered aromatic compounds. XI. Spectral and product studies of the decomposition of N-nitrosoacetanilides

1982 ◽  
Vol 60 (5) ◽  
pp. 607-615 ◽  
Author(s):  
L. Ross C. Barclay ◽  
Julian M. Dust
Keyword(s):  
Electron Transfer ◽  
Aromatic Compounds ◽  
Diazonium Salts ◽  
Tertiary Amines ◽  
Nitroso Group ◽  
Electron Transfer Mechanism ◽  
Hydride Shift ◽  
Butyl Group ◽  
Spin Resonance

Decomposition of N-nitroso-2,4,6-tri-tert-butylacetanilide (1) in benzene forms products 2,4,6-tri-tert-butylphenyl acetate (3), 3-(3,5-di-tert-butylphenyl)-2-acetoxy-2-methylpropane (4), and hydrocarbons 3-(3,5-di-tert-butylphenyl)- and 1-(3,5-di-tert-butylphenyl)-2-methylpropene (5 and 6) explained by a reactive aryl cation (2), the rearranged products (4, 5, 6) originating from a 1,5-hydride shift from an orthotert-butyl group in 2. In contrast, decomposition of 1 in triethylamine forms products 1,3,5-tri-tert-butylbenzene (10), 2,4,6-tri-tert-butylacetanilide (15), and 2-(3,5-di-tert-butylphenyl)-2-methylpropanal oxime (13), expected of a free radical pathway. Electron spin resonance evidence is given for intermediates formed by rearrangement of the 2,4,6-tri-tert-butylphenyl radical and spin trapped by the nitroso group of 1. CIDNP and esr studies on the dediazoniation of N-nitrosoacetanilide and aniline in the presence of tertiary amines support the proposed electron transfer mechanism. The results are briefly discussed in terms of the role of steric effects and electron transfer in the dediazoniation of nitrosoacetanilides and diazonium salts.

Oxovanadium(IV)-Salen Ion Catalyzed H2 O2 Oxidation of Tertiary Amines to N -Oxides- Critical Role of Acetate Ion as External Axial Ligand

2015 ◽  
Vol 47 (5) ◽  
pp. 315-326 ◽  
Author(s):  
Alagarsamy Mathavan ◽  
Arumugam Ramdass ◽  
Mohanraj Ramachandran ◽  
Seenivasan Rajagopal
Keyword(s):  
Critical Role ◽  
Axial Ligand ◽  
Tertiary Amines
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