Novel Synthesis of 3‐Indolylquinones catalyzed by Molecular Iodine under Ultrasonic Irradiation

Abstract

The conjugate addition reactions of indoles with quinones were catalyzed efficiently by molecular iodine under ultrasonic irradiation to afford 3‐indolylquinones in good to excellent yields, which provided a novel, mild, convenient approach for the preparation of 3‐indolylquinones.

Keywords:

• Indoles
• 3‐indolylquinones
• molecular iodine
• ultrasound

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Nos. 20472062 and 20672079) the Natural Science Foundation of Jiangsu Province (Nos. BK2004038 and BK2006048), and the Key Laboratory of Organic Synthesis of Jiangsu Province (No. S8109108), Nature Science Key Basic Research of Jiangsu Province for Higher Education (Nos. 06KJA15007 and 05KJB150116), the Key Laboratory of Fine Petroleum Chemistry of Jiangsu Province (No. KF0402), and a research grant from the Innovation Project for Graduate Students of Jiangsu Province.