The substrate scope: phenols or naphtholsa.
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Reaction conditions: 1 (1.0 mmol), 2a (1.5 mmol), Pd2dba3 (2.5 mol%), and Xantphos (10 mol%) in Et2O (5 mL) at rt; isolated yields are shown.
In MTBE at 35 °C.
With 5 mol% Pd(PPh3)4 in dioxane at 35 °C.
With 5 mol% Pd(PPh3)4 in MTBE at 40 °C.
With 2.5 mmol of 2a.
In MTBE at 60 °C in a sealed tube.