نتایج جستجو برای: asid amine brance

تعداد نتایج: 20563  

2006
R. GANAPATHY X. WANG F. DENES

The possibility of generating tailored surface characteristics (adhesion, biocompatibility, wettability, etc.) from plasma modified surfaces by derivatization and grafting reactions, opens up new possibilities for the creation of advanced materials. Implantation of reactive amine (primary amine) functionalities onto synthetic polymeric surfaces under cold plasma conditions one of the potential ...

2012
Bassam Nohra Laure Candy Jean-François Blanco Yann Raoul Zephirin Mouloungui

Aminolysis reaction of glycerol carbonate with primary amine in organic and hydroorganic media leads to the formation of two hydroxyurethane isomers and a partial decomposition of glycerol carbonate into glycerol. Aminolysis with a secondary amine promotes the condensation reaction and limits the formation of glycerol. The ratio of a versus b was determined by zgig C NMR. This technique permits...

2015
Dawen Niu Stephen L. Buchwald

The CuH-catalyzed hydroamination of alkenes and alkynes using a silane and an amine transfer reagent represents a simple strategy to access chiral amine products. We have recently reported methods to prepare chiral amines with high efficiency and stereoselectivity using this approach. However, the current technology is limited to the synthesis of trialkylamines from dialkylamine transfer reagen...

Journal: :Journal of the American Chemical Society 2005
Zachary D Aron Pieter C Dorrestein Jonathan R Blackhall Neil L Kelleher Christopher T Walsh

We report the expression and characterization of a truncated form of MycA from the Mycosubtilin gene cluster from Bacillus subtilis. The MycA fragment contains a new amino transferase (AMT) tailoring domain, allowing the first detailed study of a PLP-dependent enzyme operating in cis within the PKS and NRPS biosynthetic paradigm. As the AMT domain acts on covalently bound beta-ketothioesters, a...

Abdollah Fallah Shojaei, Alimorad Rashidi, Mina Ghias Robabeh Mousavi

In this study at first, in laboratory, three types of vanadium oxide were produced by using porous graphene and amine framework in hydrothermal method nanostructures such as: vanadium oxide - octadecyl amine - graphene, vanadium oxide - dodecyl amine - graphene and vanadium oxide – aniline - graphene (V-ODA-G، V-DDA-G، V-A-G). Then their structures and functions in propane dehydrogenation react...

Journal: :Organic Process Research & Development 2023

In situ generated, transient sodium monohydroxyborohydride readily reacts with a present amine to form amine-borane adducts in ethyl acetate at room temperature. Synthesis of heteroaromatic pyridine-, 2-picoline-, and 5-ethyl-2-methylpyridine-boranes, those relevant large-scale reductive aminations, has been demonstrated 100 mmol scale, pyridine-borane 1.1 mole scale. This first report substitu...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2004
Maria R D'Orsogna Tom Chou

We present a lattice model for helicity induction on an optically inactive polymer due to the adsorption of exogenous chiral amine molecules. The system is mapped onto a one-dimensional Ising model characterized by an on-site polymer helicity variable and an amine occupancy one. The equilibrium properties are analyzed in the limits of strong coupling between helicity induction and amine adsorpt...

2013
David K. Geiger Dylan E. Parsons

The non-H atoms in the structure of the title mol-ecule, C7H7N3, are almost coplanar (r.m.s. deviation = 0.018 Å). The two amine groups each donate two and accept one weak N-H⋯N hydrogen bonds. N-H⋯N hydrogen bonding between the amine and nitrile groups results in chains parallel to [101] in the crystal structure. The chains are cross-linked by N-H⋯N hydrogen bonds between amine groups, giving ...

Journal: :Dalton transactions 2013
Aurore Thibon Lydia Karmazin-Brelot Dominique Mandon

We report in this communication the facile synthesis of the new tris(thiazolylmethyl)amine TTA ligand and the full characterization in solution and in the solid state of two ferrous complexes, [(TTA)FeCl2] and [(TTA)Fe(OTf)2]. TTA, the first example of a simple tris(thiazolemethyl)amine chelate--the second one only within this class of tripods--exerts a weak ligand field and the tertiary amine ...

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