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Substrate scope for the Friedel–Crafts spirocyclization reaction. All reactions were carried out using 2 (0.20 mmol) in CHCl3 (2.0 mL). Isolated yields given. [a] From the corresponding TMS ether. [b] Reaction was carried out using 2 j (3.0 mmol) in CHCl3 (30 mL). [c] Diastereomeric ratio (d.r.) reflects that of the starting materials. [d] Diastereomers separable by column chromatography.
