Scheme 2. Substrate Scope for the α-Acylation of Various Substituted Alkenes.

Reactions were conducted on a 0.15 mmol scale. Yields are of the isolated materials after purification, Bz = benzoyl.

4-CF₃-PhSO₂Na.

4-CN-PhSO₂Na.

trans-Anethole.

cis-Anethole.

Half of 2a and MTBD were added at the beginning, and the rest was added after 12 h.

Cs₂CO₃ (0.8 equiv).