نتایج جستجو برای: primary amines

تعداد نتایج: 660093  

Journal: :Neurology 2004
G D'Andrea S Terrazzino A Leon D Fortin F Perini F Granella G Bussone

BACKGROUND Trace amines, including tyramine, octopamine, and synephrine, are closely related to classic biogenic amines. They have been hypothesized to promote migraines and other types of primary headaches, but there is no direct evidence supporting this hypothesis. METHODS Using a multichannel electrochemical high-performance liquid chromatography system, the authors evaluated whether chang...

2015
Saadi Saaidpour Asrin Bahmani Amin Rostami

In this article, at first, a quantitative structure–property relationship (QSPR) model for estimation of the normal boiling point of liquid amines is developed. QSPR study based multiple linear regression was applied to predict the boiling points of primary, secondary and tertiary amines. The geometry of all amines was optimized by the semi-empirical method AM1 and used to calculate different t...

2015
Christian G. Kendall Amanda M. Stockton Stephen Leicht Heather McCaig Shirley Chung Valerie Scott Fang Zhong Ying Lin

Fluorescent probes enable detection of otherwise nonfluorescent species via highly sensitive laser-induced fluorescence. Organic amines are predominantly nonfluorescent and are of analytical interest in agricultural and food science, biomedical applications, and biowarfare detection. Alexa Fluor 488 N-hydroxysuccinimidyl ester (AF488 NHS-ester) is an amine-specific fluorescent probe. Here, we d...

Journal: :The Journal of organic chemistry 1996
Ahmed F. Abdel-Magid Kenneth G. Carson Bruce D. Harris Cynthia A. Maryanoff Rekha D. Shah

Sodium triacetoxyborohydride is presented as a general reducing agent for the reductive amination of aldehydes and ketones. Procedures for using this mild and selective reagent have been developed for a wide variety of substrates. The scope of the reaction includes aliphatic acyclic and cyclic ketones, aliphatic and aromatic aldehydes, and primary and secondary amines including a variety of wea...

2001
E. ALPER

Aqueous solutions of amines are often used to remove CO2, H2S and COS from a large number of industrial gas streams. There are several different processes, each suiting a certain application. A recent advance in gas treating technology is the application of sterically hindered amines, which offer capacity advantages for CO2 over commercial amines such as monoethanolamine (MEA) (Sartori and Sava...

Journal: :Microbiology 1997
A Hacisalihoglu J A Jongejan J A Duine

The bacteria Klebsiella oxytoca LMD 72.65 (ATCC 8724), Arthrobacter P1 LMD 81.60 (NCIB 11625), Paracoccus versutus LMD 80.62 (ATCC 25364), Escherichia coli W LMD 50.28 (ATCC 9637), E. coli K12 LMD 93.68, Pseudomonas aeruginosa PAO1 LMD 89.1 (ATCC 17933) and Pseudomonas putida LMD 68.20 (ATCC 12633) utilized primary amines as a carbon and energy source, although the range of amines accepted vari...

Journal: :Chemical communications 2011
Ian Cumpstey Santosh Agrawal K Eszter Borbas Belén Martín-Matute

Primary carbohydrate amines at primary and secondary carbons are alkylated by alcohols in the presence of [Cp*IrCl(2)](2). When primary carbohydrate alcohols are used as the coupling partners and in the presence of Cs(2)CO(3), amine-linked pseudodisaccharides are obtained. Secondary carbohydrate alcohols are unaffected under these conditions, which allows regioselective reactions.

Journal: :Chemical communications 2015
Sonia Giust Giorgio La Sorella Laura Sperni Giorgio Strukul Alessandro Scarso

Encapsulation of a cationic carbodiimide condensing agent within a self-assembled hexameric capsule made of resorcin[4]arene units provides a nano-environment that efficiently steers the substrate selectivity in the amide synthesis reaction between carboxylic acids and primary amines. While in solution pairs of acids react similarly with a given amine, in the presence of the capsule the formati...

Journal: :The Journal of organic chemistry 2003
Mark McLaughlin Rafat M Mohareb Henry Rapoport

The preparation of O-methylimidates from alpha-aminonitriles and their subsequent co-cyclization with primary amines to afford 4-substituted 5-aminoimidazoles was studied. It was found that the mildly acidic pyridinium p-toluenesulfonate efficiently catalyzed each stage of the reaction sequence: (a) the formation of the O-methylimidates, (b) their co-cyclization with a variety of primary amines...

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