An Efficient and Mild Synthesis of Tetrahydro-4H-indol-4-one Derivatives via a Domino Reaction in Water
摘要:
An efficient domino approach for the synthesis of tetrahydro-4H-indol-4-one derivatives has been established. The use of catalytic amount of l-proline in water at 60 degrees C makes it quite simple, more convenient, and environmentally benign.
An efficient, high yielding method has been developed for the synthesis of diversity tetrahydro-4H-indol-4-one derivatives via a three component, one pot domino reaction from cyclohexane-1,3-diones, amines and nitrostyrenes using carbon functionalized with sulfonic acid group carbonaceous material as catalyst for the first time. The reaction was carried out in water, affording good to excellent yields in short time. The advantages of atom and step economy, green, and scope make this reaction a powerful tool for assembling heterocyclic scaffolds of general chemical and biomedical interest. (C) 2014 Elsevier B.V. All rights reserved.