Intramolecular Michael reaction using trialkylsilyl trifluoromethanesulfonates and tertiary amine system: total synthesis of (±)-ricciocarpin A

Abstract

Intramolecular Michael reaction of bis-α,β-unsaturated esters 1 forming 2 was carried out by the action of a trialkylsilyl trifluoromethanesulfonate in the presence of a tertiary amine; the product was transformed into ricciocarpin A 8.