Results 31 to 40 of about 4,067 (210)

Carbocations and the Complex Flavor and Bouquet of Wine: Mechanistic Aspects of Terpene Biosynthesis in Wine Grapes. [PDF]

open access: yes, 2015
Computational chemistry approaches for studying the formation of terpenes/terpenoids in wines are presented, using five particular terpenes/terpenoids (1,8-cineole, α-ylangene, botrydial, rotundone, and the wine lactone), volatile compounds (or their ...
Pemberton, Ryan P   +2 more
core   +2 more sources

Hydrocarbon molar water solubility predicts NMDA vs. GABAA receptor modulation. [PDF]

open access: yes, 2014
BackgroundMany anesthetics modulate 3-transmembrane (such as NMDA) and 4-transmembrane (such as GABAA) receptors. Clinical and experimental anesthetics exhibiting receptor family specificity often have low water solubility. We hypothesized that the molar
Brosnan, Robert J, Pham, Trung L
core   +2 more sources

Ring Tension, Hydrocarbon Acidity, and New «Super-Bases»

open access: yesCHIMIA, 1986
Addition of disodium pinacolate or, particularly, potassium tert-butoxide considerably increases the transmetalating power of pentylsodium. A hexane slurry of such «NACNAOR» or «NACKOR» reagent mixtures readily and selectively converts 3,3-dimenthyl-1 ...
Manfred Schlosser   +5 more
doaj   +1 more source

Supported Gold Nanoparticles for Alcohols Oxidation in Continuous-Flow Heterogeneous Systems [PDF]

open access: yes, 2017
Gold nanoparticles (AuNPs) were anchored on alkynyl carbamate-functionalized support materials having the suitable features for application as catalysts in continuous-flow packed bed reactors.
Ballarin, Barbara   +9 more
core   +2 more sources

Synthesis of Cyclobutane Serine Analogues

open access: yesThe Journal of Organic Chemistry, 2004
In this paper, we describe a thermal [2 + 2] cycloaddition involving 2-acylaminoacrylates as electron-poor acceptor alkenes, a reaction that involves a Michael-Dieckmann-type process. The reaction gives rise to a new substituted cyclobutane skeleton that can be transformed into amino acid derivatives.
Avenoza, A.   +3 more
openaire   +4 more sources

r-1,t-3-Bis[4-(dimethylamino)phenyl]-c-2,t-4-bis(pyridin-4-yl)cyclobutane

open access: yesActa Crystallographica Section E, 2014
The title compound, C30H32N4, was synthesized by the photodimerization of trans-4-{2-[4-(dimethylamino)phenyl]ethenyl}pyridine in benzene upon irradiation with UV light.
Shuguang Zhang, Junpeng Zhuang
doaj   +1 more source

Anethole Isomerization and Dimerization Induced by Acid Sites or UV Irradiation

open access: yesMolecules, 2010
The formation of cis-anethole and various dimers as a result of the exposure of trans-anethole to microporous solid acids (dealuminated HY zeolites), or UV-Vis irradiation was established by means of high resolution gas chromatography coupled to mass ...
Elena Stashenko   +2 more
doaj   +1 more source

[2+2]-Photocycloadditions of 1,4-Naphthoquinone Under Batch and Continuous-Flow Conditions

open access: yesMolecules
A series of [2+2]-photocycloadditions of 1,4-naphthoquinone with various alkenes and diphenylacetylene were investigated under batch and continuous-flow conditions.
Madyan A. Yaseen   +3 more
doaj   +1 more source

Reversible photoswitching of the DNA-binding properties of styrylquinolizinium derivatives through photochromic [2 + 2] cycloaddition and cycloreversion

open access: yesBeilstein Journal of Organic Chemistry, 2020
It was demonstrated that styrylquinolizinium derivatives may be applied as photoswitchable DNA ligands. At lower ligand:DNA ratios (≤1.5), these compounds bind to duplex DNA by intercalation, with binding constants ranging from Kb = 4.1 × 104 M to 2.6 ...
Sarah Kölsch   +4 more
doaj   +1 more source

Photolyzable Polymer Brushes: Subtractive 3D Structuring of Surfaces Using Water and Light

open access: yesAngewandte Chemie International Edition, EarlyView.
Facile structuring of polymer brushes is achieved by flipping the process from controlled growth to controlled brush photolysis. Using surface‐initiated radical ring‐opening polymerization of cyclic monomers with photocleavable cyclobutane rings, photodegradable targets are embedded into the polymer chains. The enabled continuous subtractive patterning
Henrik Kalmer   +11 more
wiley   +1 more source

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