Calix[4]arenes with intramolecularly bridged meta positions prepared via Pd-catalysed double C-H activation

Chem Commun (Camb). 2013 Apr 7;49(27):2798-800. doi: 10.1039/c3cc40655e.

Abstract

The introduction of a 2-pyridylsulfoxide moiety into the upper rim of calix[4]arenes enabled the synthesis of unprecedented derivatives with intramolecularly bridged meta positions of two neighbouring aromatic subunits. Palladium-catalysed double C-H activation thus represents a straightforward way to a completely novel type of calixarenes.