Acidic Ionic Liquid–Catalyzed Highly Efficient Reaction of Indoles to α,β‐Unsaturated Ketones

Abstract

Abstract A novel method for the Michael reaction of indoles to α,β‐unsaturated ketones catalyzed by acidic ionic liquid is reported. We obtained the corresponding products in excellent yields in the presence of [hmim]HSO4. Development of this method has resulted in a new protocol for the synthesis of β‐indolylketones.