Synthesis 2019; 51(15): 2945-2958
DOI: 10.1055/s-0037-1611577
paper
© Georg Thieme Verlag Stuttgart · New York

DBU-Catalyzed Michael Reaction of Enones with 1,3-Diketones and the Subsequent Iodine-Mediated Transformation of the Adducts to Polysubstituted Phenols

Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, No. 1, Gehu Road, Wujin District, Changzhou 213164, P. R. of China   Email: estally@yahoo.com
,
Mei-Ling Chen
,
Xiao-Qiang Sun
,
› Author Affiliations
We are grateful for the financial support from Natural Science Foundation of Jiangsu Province (BK20181462), the Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology (BM2012110), and the Advanced Catalysis and Green Manufacturing Collaborative Innovation Center.
Further Information

Publication History

Received: 12 February 2019

Accepted after revision: 24 March 2019

Publication Date:
18 April 2019 (online)


Abstract

An efficient DBU-catalyzed Michael reaction of enones with 1,3-diketones has been developed for the gram-scale preparation of the Michael adducts. It is attractive that most of the adducts can be obtained with high purity through simple filtration. A convenient I2-mediated transformation of the adducts to polysubstituted phenols has also been exploited. This conversion is remarkable with the cyclization and aromatization processes by using DBU as the base and I2 as the oxidant. Furthermore, hydroxylated (E)-stilbene derivatives can be easily prepared by using this method. The readily available starting materials, metal-free and mild conditions make this approach simple and practical.

Supporting Information