Figure 3.

Substrate Scope for Bicyclic Acetals

Reaction conditions: photosensitizer (0.01 mmol, 5 mol%), PhSSPh (0.04 mmol, 20 mol%), allylic alcohol (0.2 mmol), dihydropyran (0.8 mmol) in 3 mL of DCE. Yield in parenthesis was for 1 mmol preparative-scale reaction. ^aReaction conditions: photosensitizer (0.01 mmol, 5 mol%), PhSSPh (0.04 mmol, 20 mol%), allylic alcohol (0.2 mmol), dihydropyran (0.8 mmol) in 3 mL of DCE. ^bYield in parenthesis was for 1 mmol preparative-scale reaction.