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- Title
Destabilizing Predictive Copper‐Catalyzed Click Reactions by Remote Interactions with a Zinc‐Porphyrin Backbone.
- Authors
Trouvé, Jonathan; Gramage‐Doria, Rafael
- Abstract
In order to obtain new supramolecular ligands that build up around a zinc‐porphyrin scaffold, we envisioned to access sulfonyl triazole intermediates by well‐known copper‐catalyzed click reactions. Unexpectedly, these triazole intermediates do not form due to the presence of the zinc‐porphyrin moiety at close proximity of the active copper species. Indeed, the copper catalyst undergoes a different chemo‐selective reaction pathway reacting with traces of alcohols or water from the media that behave as effective nucleophiles leading to sulfonyl imidates or sulfonyl amides covalently connected to the zinc‐porphyrin. We show that copper‐catalyzed click reactions can follow different reaction mechanisms when the catalytic events occur at close proximity of a zinc‐porphyrin unit which likely acts as a Lewis acid to stabilize otherwise inaccessible reaction intermediates.
- Subjects
COPPER catalysts; LEWIS acids; COPPER; TRIAZOLES; NUCLEOPHILES; AMIDES; SPINE
- Publication
Helvetica Chimica Acta, 2023, Vol 106, Issue 3, p1
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.202200191