Synthesis 2021; 53(18): 3193-3210
DOI: 10.1055/a-1405-5761
special topic
Bond Activation – in Honor of Prof. Shinji Murai

Recent Advances on Benzofuranones: Synthesis and Transformation via C–H Functionalization

Zhi Tang
a   State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. of China
b   Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources Hainan Provincial Key Lab of Fine Chem, Hainan University, Haikou, 570228, P. R. of China
,
Zhou Tong
a   State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. of China
,
Renhua Qiu
a   State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. of China
,
Shuang-Feng Yin
a   State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. of China
,
Nobuaki Kambe
a   State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. of China
c   The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
› Author Affiliations
The authors thank the Natural Science Foundation of China (21676076, 21878071, and 21971060), Hu-Xiang High Talent in Hunan Province (2018RS3042), Recruitment Program of China (WQ20164300353), and the Natural Science Foundation of Changsha (kq2004008) for financial support.


Dedicated to Prof. Shinji Murai on the occasion of his 80th birthday.

Abstract

The benzofuranone structure is important in many fields, such as natural products, pharmaceuticals, building blocks, antioxidants, and dyes. The efficient synthesis and transformation of benzofuranones have attracted great attention in organic synthesis. They can be synthesized by the Friedel–Crafts reaction and intramolecular dehydration ring-closing and transition-metal-catalyzed reactions, among others. Their direct utilization in the preparation of other functional molecules further enhance their application. Due to their low pK a value and easy enolization, the transformation of benzofuranones via C(3)–H bond functionalization has been a hot issue since 2010. Herein, we highlight advances in the synthesis of benzofuranones and their transformation via C–H functionalization. Other transformations related to benzofuranones are also discussed.

1 Introduction

2 Synthesis of Benzofuranones

3 C–H Functionalization of Benzofuranones

4 Other Types of Reactions of Benzofuranones

5 Conclusion and Outlook



Publication History

Received: 07 February 2021

Accepted after revision: 03 March 2021

Accepted Manuscript online:
04 March 2021

Article published online:
31 March 2021

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