Calix[6]arenes incorporating functionalised substituents at the methylene bridges

The hexabromocalix[6]arene 5 reacts with p-tert-Bu-phenol, thymol and propargyl alcohol to afford the corresponding hexasubstituted methylene-functionalised calixarenes. The substituents at the bridges were further functionalised via acetylation or click chemistry. Reaction of the hexahydroxy derivative 10 with DAST afforded 11, a first example of a calixarene with all bridges monofluorinated.