Synthesis of C-fragment buckybowls bearing alkoxy substituents.

Buckybowls bearing a C fragment having two alkoxy groups were synthesized and their structural and optical properties were investigated by single crystal X-ray analysis and UV-vis spectroscopy. In the synthesis of dioxole derivative , the regioisomer was also produced. The yield of was increased by increasing the reaction temperature, indicating that the rearrangement might involve the equilibrium between the Pd(IV) intermediates through C-H bond activation.