The phenolic functionality provides a handle for further functionalization through cross-coupling processes which was demonstrated with transition metal catalysis (Scheme 3). Ullmann arylation of 3ba with iodopyridine gave ether 7. Triflation was achieved in quantitative yield, which allowed for Suzuki- Miyaura coupling to form biaryl derivative 9. Carboxylic acid derivative 10 was prepared from furan 3ao by selective oxidative cleavage using ruthenium catalysis. 16 The acid was readily applied in amide bond formation with standard conditions to give amide 11. Scheme 3. Further functionalisation of 3,3-diarylthietane dioxides.