Results 161 to 170 of about 5,195 (200)
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Journal of the American Chemical Society, 2006
The synthesis of rotaxanes derived from the synthetic peptide macrocycles cyclo(l-ProGly)4 and cyclo(l-ProGly)5 and diammonium threads is described. [2]Rotaxanes are formed in good yields (56-63%), despite the disruption of internal amide-amide hydrogen bonding in the macrocycles.
Vincent, Aucagne +3 more
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The synthesis of rotaxanes derived from the synthetic peptide macrocycles cyclo(l-ProGly)4 and cyclo(l-ProGly)5 and diammonium threads is described. [2]Rotaxanes are formed in good yields (56-63%), despite the disruption of internal amide-amide hydrogen bonding in the macrocycles.
Vincent, Aucagne +3 more
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A Rotaxane‐Based Switchable Organocatalyst
Angewandte Chemie, 2012Switch it on! The activity of an organocatalytic group incorporated within a rotaxane architecture can be controlled by switching the position of the macrocycle. The system was used to mediate the progress of the Michael addition of an aliphatic thiol to trans-cinnamaldehyde. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Blanco, Victor +4 more
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Recent progress on switchable rotaxanes
Chemical Society Reviews, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
He, Tian, Qiao-Chun, Wang
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Light‐Harvesting in Multichromophoric Rotaxanes
Chemistry – A European Journal, 2011AbstractTwo rotaxanes with benzyl ether axles and tetralactam wheels were synthesized through an anion template effect. They carry naphthalene chromophores attached to the stopper groups and a pyrene chromophore attached to the wheel. The difference between the two rotaxanes is represented by the connecting unit of the naphthyl chromophore to the ...
GALLINA, MARIA ELENA +3 more
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Angewandte Chemie, 1997
Hydrophobe Wechselwirkungen wurden für die Selbstorganisation von Azofarbstoffen und Makrocyclen zu den stabilen Rotaxanen 1 genutzt. Eingeschlossen von α‐Cyclodextrin, β‐Cyclodextrin oder einem Cyclophan, wurden die hantelförmigen Azofarbstoffe durch Azokupplung im wäßrigen Medium synthetisiert.magnified ...
Sally Anderson +2 more
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Hydrophobe Wechselwirkungen wurden für die Selbstorganisation von Azofarbstoffen und Makrocyclen zu den stabilen Rotaxanen 1 genutzt. Eingeschlossen von α‐Cyclodextrin, β‐Cyclodextrin oder einem Cyclophan, wurden die hantelförmigen Azofarbstoffe durch Azokupplung im wäßrigen Medium synthetisiert.magnified ...
Sally Anderson +2 more
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Angewandte Chemie, 1997
Nicht eingefädelt wird der Glycylglycin‐Faden (unten links) in Benzylamid‐Makrocyclen, diese werden vielmehr um das Peptid herum aufgebaut; dabei wirken die Amidgruppen des Dipeptids als Templat, und es entstehen Peptid‐[2]rotaxane (unten rechts). Die vier Wasserstoffbrücken zwischen den Ausgangsverbindungen, durch die eine Cyclisierung ermöglicht wird,
David A. Leigh +3 more
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Nicht eingefädelt wird der Glycylglycin‐Faden (unten links) in Benzylamid‐Makrocyclen, diese werden vielmehr um das Peptid herum aufgebaut; dabei wirken die Amidgruppen des Dipeptids als Templat, und es entstehen Peptid‐[2]rotaxane (unten rechts). Die vier Wasserstoffbrücken zwischen den Ausgangsverbindungen, durch die eine Cyclisierung ermöglicht wird,
David A. Leigh +3 more
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2019
In this chapter, the preparation of cucurbituril-based pseudorotaxanes, rotaxanes and polyrotaxanes is illustrated with selected examples. This includes the notions of self-sorting, which enables the setup of homo- and hetero(pseudo)rotaxanes. The implications of thermodynamic and kinetic control are briefly showcased as well.
N. Basílio, U. Pischel
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In this chapter, the preparation of cucurbituril-based pseudorotaxanes, rotaxanes and polyrotaxanes is illustrated with selected examples. This includes the notions of self-sorting, which enables the setup of homo- and hetero(pseudo)rotaxanes. The implications of thermodynamic and kinetic control are briefly showcased as well.
N. Basílio, U. Pischel
openaire +1 more source