Citation: Huang Shuaishuai, Nie Yixue, Yang Jingjing, Zheng Zhanjiang, Cao Jian, Xu Zheng, Xu Liwen. Copper-Catalyzed Arylated Etherification of 2, 2-Difluoroethanol and Its Mechanistic Study[J]. Chinese Journal of Organic Chemistry, ;2020, 40(7): 2018-2025. doi: 10.6023/cjoc202003035 shu

Copper-Catalyzed Arylated Etherification of 2, 2-Difluoroethanol and Its Mechanistic Study

a.
Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 311121
b.
Collaborative Innovation Center for Fluorosilicone-based Fine Chemicals and Materials, Hangzhou Normal University, Hangzhou 311121

Corresponding author: Zheng Zhanjiang, zzjiang78@hznu.edu.cn Xu Liwen, liwenxu@hznu.edu.cn
Received Date: 14 March 2020
Revised Date: 17 April 2020
Available Online: 23 April 2020
Fund Project: the National Natural Science Foundation of China 21801056Project supported by the National Natural Science Foundation of China (Nos. 21703051, 21801056) and the Hangzhou Science and Technology Bureau of China (No. 20180432B05)the National Natural Science Foundation of China 21703051the Hangzhou Science and Technology Bureau of China 20180432B05

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Both organofluorine and organosilicon compounds are one of the most important types of high-tech product in elementorganic chemistry, and have been received much attetions in the past decades. Considering the imporatance of difluoroethanol moeity in pesticides, the development of a mild and efficient copper-catalyzed arylated etherification reaction of difluoroethanol is highly desirable. Herein, a mild and efficient method for the preparation of difluoroethyl aryl ethers was developed by the copper-catalyzed Ullmann-type arylated etherification reaction of aryl bromides or iodides with 2, 2-difluoroethanol. This reaction proceeds smoothly in the presence of CuI and 8-hydroxyquinoline/t-BuOK, and has a broad substrate scope. ESI-MS analysis supported the existence of LCu(Ⅲ)Ar(OR) species during this catalytic reaction. Further density functional theory (DFT) calculations suggest a proposed mechanism of arylated etherification reaction involving oxidative addition, followed by nucleophile substitution and reductive elimination would be rational.
- Ullmann reaction,
- Cu-catalyzed,
- fluorinated compound,
- DFT calculation,
- 8-hydroxyquinoline
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