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Journal ArticleDOI

Electron Transfer‐Catalyzed Diels–Alder Reactions with 2‐Vinylindoles

Olaf Wiest, +1 more
- 01 Jun 1993 - 
- Vol. 32, Iss: 6, pp 901-903
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This article is published in Angewandte Chemie.The article was published on 1993-06-01. It has received 35 citations till now. The article focuses on the topics: Reaction mechanism & Nitrile.

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Why, on interaction of urea-based receptors with fluoride, beautiful colors develop.

TL;DR: Urea-based receptors, containing electron-withdrawing chromogenic substituents, in a DMSO solution, in the presence of varying excess of fluoride, do not form H-bond complexes, but undergo stepwise deprotonation of the two N-H fragments, an event which is signaled by the development of vivid colors.
Journal ArticleDOI

Multiple hydrogen bond stabilization of a sandwich complex of sulfate between two macrocyclic tetraamides.

TL;DR: Crystallographic findings in the case of sulfate indicate an unusual sulfate sandwich complex, in which a single sulfate ion is held between two macrocyclic amides by hydrogen bonds to eight amides.
Journal ArticleDOI

Anion receptors: a new class of amide/quaternized amine macrocycles and the chelate effect.

TL;DR: A new class of tetraamide macrocyclic receptors for anions with two quaternized amine functionalities exhibited higher affinities for anion compared with the corresponding neutral amides.
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Tripodal Ionophore with Sulfate Recognition Properties for Anion-Selective Electrodes

TL;DR: A new class of ionophores that incorporates aminochromenone moieties linked through urea spacers to different scaffolds that preorganize the ionophore binding cleft into tripodal topologies shows anti-Hofmeister behavior with an improved selectivity for sulfate.
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