Methylamines

Gysel, August B. van; Musin, Willy

doi:10.1002/14356007.a16_535

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…For instance, methylamine is synthesized from methanol and ammonia over silica–alumina catalysts at 300–430°C, but dimethylamine and triethylamine are also produced. [3] To improve the reactivity and selectivity of ammonia toward many desired transformations, catalysts based on transition-metal complexes have been studied.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Organometallic Reactions of Ammonia

2010

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Until recently, ammonia had rarely succumbed to catalytic transformations with homogeneous catalysts, and the development of such reactions that are selective for the formation of single products under mild conditions has encountered numerous challenges. However, recently developed catalysts have allowed several classes of reactions to create products with nitrogen-containing functional groups from ammonia. These reactions include hydroaminomethylation, reductive amination, alkylation, allylic substitution, hydroamination, and cross-coupling. This Minireview describes examples of these processes and the factors that control catalyst activity and selectivity.

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Section: Introductionmentioning

confidence: 99%

Catalytic Organometallic Reactions of Ammonia

2010

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“…In this study, TMA was identified as a novel odor marker associated with aging in the urine samples of 10-month-old ICR mice. This compound is produced by the catalytic reaction of ammonia and methanol [ 32 ]. At high concentrations, TMA has an ammonia-like odor, whereas it has a fishy odor at low concentrations [ 33 ].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Deodorizing Effects of Saccharina japonica in 10-Month-Old ICR Mice Using a Novel Odor Marker Associated with Aging

Kim

Choi

Lee

et al. 2022

Evidence-Based Complementary and Alternative Medicine

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The potential deodorizing effects of Saccharina japonica have been evaluated by determining their deodorizing performance, but they are yet to be validated in experimental animals. The deodorizing effects of S. japonica were examined in an animal model using a novel odor marker associated with aging by comparing the concentration of odor component in urine obtained from two- and 10-month-old ICR mice using gas chromatography-mass spectrometry (GC-MS), and the changes in the trimethylamine (TMA) concentration, ammonia level, and structure of sweat gland were determined after exposing 10-month-old ICR mice to 70% ethanol extract of S. japonica (EESJ) for four weeks. In vitro analysis was performed to confirm the composition of EESJ with respect to the total flavonoid contents (TFC, 28.6 ± 2.5 mg/g), total polyphenol contents (TPC, 107.3 ± 8.9 mg/g), and total condensed tannin contents (TTC, 65.7 ± 5.2 mg/g) contents, as well as to the deodorizing performance to ammonia and acetic acid (91.2 ± 7.8% and 54.8 ± 6.3%, respectively). In vivo analysis revealed TMA to be the novel odor marker associated with aging among the 19 odor components evaluated, considering the higher concentration in the urine of 10-month-old ICR mice. The peak area of TMA on the gas chromatogram was significantly lower in the 10-month-old ICR mice treated with EESJ than in the two-month-old mice. A similar decrease was observed in the level of ammonia obtained from the dirty bedding of the EESJ-treated group. Moreover, tissues obtained from the mouse foot of the group exposed to EESJ showed a dose-dependent decrease in the gland tube number of sweat glands and the TMA dehydrogenase transcription level. Overall, these results provide novel evidence that the administration of EESJ helps reduce the body TMA and ammonia concentrations, resulting in reduced odor and a decrease in the number of sweat glands and the expression of TMA dehydrogenase in the ICR mouse feet.

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“…Aliphatic amines, such as methylamine, ethylamine, and long chain fatty amines, is also a class of important N-containing compounds and can serve as key intermediates and raw feedstock to manufacture pharmaceuticals, agrochemicals, surfactants, water treatment reagents, solvents, and dyes. , The main approach for producing aliphatic amines is via the cascade dehydrogenation, ammonization, and hydrogenation reactions in the presence of H 2 over hydrogenation–dehydrogenation catalysts. In this process, H 2 plays an important role in promoting alcohol conversion and keeping catalysts stable .…”

Section: Synthesis Of N-containing Compounds From Renewable Resources...mentioning

confidence: 99%

Recent Advances of Producing Biobased N-Containing Compounds via Thermo-Chemical Conversion with Ammonia Process

Shi

et al. 2020

Energy Fuels

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Biomass is regarded as an abundant feedstock for producing renewable biofuels and chemicals. Thanks to their inherent chemical functionality and reactivity, biomass resources also have infinite possibilities to replace fossil resources for producing N-containing compounds by the introduction of nitrogen heteroatoms. Thermo-chemical conversion of biomass and the derived substrates with ammonia into N-containing compounds has been identified as a promising strategy and has received growing research interest. This review summarizes recent progress in producing different N-containing compounds from biobased substrates via the thermo-chemical conversion with ammonia (TCC-A) process, which provides some valuable information for researchers to accomplish sustainable synthesis of value-added N-containing compounds. The substrate scope for producing biobased N-containing compounds covers the bioderived small molecules and raw biomass. The reaction mechanism and typical reaction pathway for the preparation of those N-containing compounds, such as pyridines, pyrroles, indoles, nitriles, and amines, are summarized and outlined. Finally, critical challenges and stimulating perspectives are provided.

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Methylamines

Cited by 3 publications

References 5 publications

Catalytic Organometallic Reactions of Ammonia

Catalytic Organometallic Reactions of Ammonia

Evaluation of Deodorizing Effects of Saccharina japonica in 10-Month-Old ICR Mice Using a Novel Odor Marker Associated with Aging

Recent Advances of Producing Biobased N-Containing Compounds via Thermo-Chemical Conversion with Ammonia Process

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