Scheme 3. α-Arylation of substituted pyrrolidines and piperidines. [a] Reactions were performed with cyclic amine (0.33 mmol), quinone monoacetal 2 (0.3 mmol), nucleophile (0.45 mmol), and DABCO (0.06 mmol) at 60 °C in toluene (conc. = 0.5 M).