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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Small cavitand macrocycles from direct C-C coupling of s-aryl tetrazine units
Clève D Mboyi1, Henri Sabbadin1, Marie-José Penouilh1
1Université Bourgogne Europe, CNRS, ICMUB UMR 6302, 2100 Dijon, France. hiersojc@u-bourgogne.fr.
Abstract:
s-Aryltetrazine subunits are assembled into macrocyclic tri- and tetramers through carbon-carbon bond formation via Ullmann homocoupling of bromophenyltetrazines. Short aryl-tetrazine linkages generate compact, rigid macrocycles with small internal cavities, alongside noncyclised linear analogues. Structural and electrochemical analysis reveal size-dependent redox behaviour and through-space electronic communication, highlighting novel tetrazine-based host architectures as redox-active systems.
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