Solvent-dependent helix inversion in optically active poly(diphenylacetylene)s and their chiral recognition abilities as chiral stationary phases for high-performance liquid chromatography.
Sign Up to like & getrecommendations! Published in 2022 at "Chirality"
DOI: 10.1002/chir.23416
Abstract: We report the first example of solvent-dependent helix inversion in poly(diphenylacetylene) (PDPA) derivatives. Asymmetrically substituted PDPAs bearing optically active substituents linked through amide bonds formed preferred-handed helical conformations because of the optically active substituents in… read more here.
Keywords: dependent helix; solvent dependent; optically active; helix inversion ... See more keywords
Optically active polyimides with different thermal histories of their preparation.
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DOI: 10.1002/chir.23476
Abstract: Optically active linear polyimides and hyperbranched poly (amic acid-imide) were prepared by using procedures varying in particular in the maximum temperature employed in their synthesis. The two types of linear polyimides were based on 4,4'-(hexafluoroisopropylidene)diphthalic… read more here.
Keywords: hexafluoroisopropylidene diphthalic; polyimides different; different thermal; optically active ... See more keywords
Controlled release of an optically active compound by hydrogels of acrylic acid and its on-line detection
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DOI: 10.1002/cjce.23038
Abstract: Hydrogels of acrylic acid were produced through solution free radical polymerization at 70 °C. The materials obtained were put in contact with D-fructose solution and the swelling behaviour was registered. The swollen hydrogels were immersed in… read more here.
Keywords: optically active; detection; controlled release; release optically ... See more keywords
Rearrangement Reactions leading to Optically Active α,α‐Disubstituted Primary Allylamines
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DOI: 10.1002/ejoc.201601446
Abstract: Synthetic routes to α,α-disubstituted allylamines have been examined. Racemic compounds were conveniently prepared by thermal Overman rearrangements of primary allyl alcohols with trisubstituted double bonds, but rearrangement of these substrates by the only commercially available… read more here.
Keywords: optically active; reactions leading; rearrangement reactions; active disubstituted ... See more keywords
Computational study of Simultaneous synthesis of optically active (RS)-1,2,4-butanetriol trinitrate (BTTN)
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DOI: 10.1007/s00894-017-3414-9
Abstract: AbstractIn respective water or ethanol polarizable continuum cavity environments, simultaneous aldol condensation was performed using density functional theory (DFT) computational method to model the synthesis of optically active (RS)-1,2,4-butanetriol trinitrate (BTTN). The results of reaction… read more here.
Keywords: optically active; synthesis optically; active butanetriol; butanetriol trinitrate ... See more keywords
Synthesis from (–)-α-Pinene of an Optically Active Macrocyclic Diesterdihydrazide with 2,6-Pyridinedicarboxylic and Adipic Acid Moities
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DOI: 10.1007/s10600-017-1912-8
Abstract: An optically active macrocyclic diesterdihydrazide with 2,6-pyridinedicarboxylic and adipic acid moieties was synthesized efficiently from available (–)-α-pinene through an intermediate hydroxyketone [1R-(1′-hydroxyethyl)-3R-(2″-hydroxyethyl)-2,2-dimethylcyclobutane) using successive [2 + 1]-reaction of the last with 2,6-pyridinedicarboxylic acid dichloride and… read more here.
Keywords: optically active; adipic acid; macrocyclic diesterdihydrazide; active macrocyclic ... See more keywords
Synthesis of Optically Active Macrolides From L-Menthone Derivatives and Hydrazides of Adipic and 2,6-Pyridinedicarboxylic Acids
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DOI: 10.1007/s10600-018-2387-y
Abstract: Efficient syntheses of two potentially useful optically active macroheterocycles with esters and dihydrazides of 2,6-pyridinedicarboxylic and adipic acids starting from available natural L-menthol and passing through intermediate 8-hydroxy-2,6R-dimethyloctan-3-one were developed. The key steps were [2… read more here.
Keywords: optically active; synthesis optically; macrolides menthone; active macrolides ... See more keywords
Sol-gel materials for electro-optical and optically active humidity-sensitive devices
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Sol-Gel Science and Technology"
DOI: 10.1007/s10971-018-4852-2
Abstract: AbstractOne of the main research activities of the Sol-Gel Group@ICMM (GSG-ICMM) is devoted to smart photonic materials derived from the incorporation of optically active substances in glasses. Those smart materials allow the control of their… read more here.
Keywords: optically active; control; air; material ... See more keywords
Synthesis of optically active 2,7-disubstituted naphthalene derivatives and evaluation of their enantioselective recognition ability
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DOI: 10.1007/s11172-020-2910-8
Abstract: The palladium-catalyzed amination was used to synthesize 2,7-diamino derivatives of naphthalene containing two chiral substituents and fluorophore groups (dansyl, 7-methoxycoumarin, 6,7-dimethoxycoumarin, 6-aminoquinoline). The synthesized compounds were studied by UV absorption and fluorescence spectroscopy in the… read more here.
Keywords: optically active; synthesis optically; naphthalene derivatives; recognition ... See more keywords
Synthesis of optically active 3,3’-disubstituted biphenyl derivatives using palladium-catalyzed amination and their evaluation as enantioselective fluorescent detectors for amino alcohols and metal cations
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DOI: 10.1007/s11172-020-2911-7
Abstract: The palladium-catalyzed amination was used to synthesize optically active 3,3’-diaminosubstituted biphenyl derivatives (in particular, macrocyclic derivatives) decorated with additional fluorophore groups (dansyl and 7-methoxycoumarin). The synthesized compounds were studied by spectroscopic methods (UV spectroscopy, fluorescence)… read more here.
Keywords: optically active; biphenyl derivatives; palladium catalyzed; amino alcohols ... See more keywords
Estimation of Kd(PAR) in inland waters across China in relation to the light absorption of optically active components
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DOI: 10.1007/s11356-019-06122-w
Abstract: The comprehensive analysis of the relationships between the attenuation of photosynthetic active radiation (Kd(PAR)) and light absorption is an imperative requirement to retrieve Kd(PAR) from remote sensing data for aquatic environments. The spatial distributions of… read more here.
Keywords: optically active; par; absorption optically; active components ... See more keywords