A highly efficient three-component coupling of aldehyde, terminal alkyne, and amine via C-H activation catalyzed by reusable immobilized copper in organic-inorganic hybrid materials under solvent-free reaction conditions

Recycling copper( I) immobilized on organic-inorganic hybrid material behaves as a very efficient heterogeneous catalyst in the three-component Mannich coupling reaction of aldehydes, terminal alkynes, and amines via C-H activation to afford the corresponding products in good to excellent yields under solvent-free reaction conditions. (c) 2007 Elsevier Ltd. All rights reserved.