Generality of the “interaction strategy” using a series of substrates^a.

^aGeneral conditions: 1 (0.1 mmol), 8 (or 2) (0.12 mmol), and (S)-6 (0.01 mmol) in toluene (1 mL) with MS 5A (50 mg) at room temperature for 5 days.

^b7 days.

^c3.0 eq. of 8 (or 2) was used.