Fig. 2

Substrate Scope of α-Naphthols. Reaction conditions: 1 (0.1 mmol), azodicarboxylate (0.15 mmol) and (S)-C2 (10 mol%) in DCE (2 mL) at 50 °C. ^aAfter work up, ^tBuOK (2 equiv in THF) was added at rt. ^bAt 0.2 mmol scale. Bz, benzoyl