Recoverable Chiral Sulfoxide: Asymmetric Diels–Alder Reaction Using Optically Active 1-(2-p-Tolylsulfinyl)pyrrolylα,β-Unsaturated Ketones as a Dienophile
Recoverable Chiral Sulfoxide: Asymmetric Diels–Alder Reaction Using Optically Active 1-(2-p-Tolylsulfinyl)pyrrolylα,β-Unsaturated Ketones as a Dienophile