Scheme 27.
Representative control experiments. Conditions: 36 (0.3 mmol), 37 (0.6 mmol), PivOH (0.3 mmol), BaTiO3 (<3 μm, 0.6 mmol), and H2O (0.6 mmol) were added in a 20 mL milling jar with 30 balls (6 mm Ø) for 6 h at 550 rpm. Isolated yield. Adapted from Ref. [158a]. Copyright 2021, American Chemical Society.