|
1
|
Ye S, Wang H, Liang G, Hu Z, Wan K, Zhang L, Peng B. ortho-Cyanomethylation of aryl fluoroalkyl sulfoxides via a sulfonium-Claisen rearrangement. Org Biomol Chem 2024; 22:1495-1499. [PMID: 38293848 DOI: 10.1039/d3ob02102e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
We hereby report the ortho-cyanomethylation of aryl fluoroalkyl sulfoxides with acetonitrile through a sulfonium-Claisen-type rearrangement. This reaction enables the incorporation of two valuable functional groups, such as the cyanomethyl group and the fluoroalkylthio group, into arenes. Remarkably, fluoroalkylthio groups, such as SCFH2 and SCF2H, bearing active hydrogen, are well tolerated by the reaction. The success of the reaction relies on the use of an excess amount of acetonitrile and the electronegative effect of fluoroalkyl substituents, both of which promote the electrophilic assembly of sulfoxides with acetonitrile. Consequently, the sulfonium-Claisen rearrangement reaction tolerates a wide variety of fluoroalkyl sulfoxides bearing functional groups including halides, nitriles, ketones, sulfones, and amides, which are appealing for subsequent elaboration and exploration.
Collapse
Affiliation(s)
- Sheng Ye
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Huanhuan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Guoqing Liang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Zhengkai Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Kun Wan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Lei Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| | - Bo Peng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China.
| |
Collapse
|
|
2
|
Zheng L, Qiu X, Xiao Z, Ma X, Gao T, Zhou X, Wang Y, Guo Y, Chen QY, Liu C. Deoxygenation of ClSO 2CF 2COOMe with Triphenylphosphine for the Metal-Free Direct Electrophilic Difluoroalkylthiolation of Various Heterocycles. J Org Chem 2023. [PMID: 37134234 DOI: 10.1021/acs.joc.3c00342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A direct electrophilic difluoroalkylthiolation reaction of indole derivatives and other electron-rich heterocycles using methyl 2,2-difluoro-2-(chlorsulfonyl)acetate (ClSO2CF2COOMe) derived from Chen's reagent (FSO2CF2COOMe) is described. The ester group in the product can be further utilized in subsequent versatile transformations. The reactions provide good yields of the corresponding difluoroalkylthiolation products and exhibit high functional group compatibility. It is expected to serve as an alternative and practical protocol for difluoroalkylthiolation of various heterocycles.
Collapse
Affiliation(s)
- Liping Zheng
- School of Chemical Engineering and Food Science, Zhengzhou University of Technology, 18 Yingcai Street, Zhengzhou 450044, China
| | - Xin Qiu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China
| | - Zhiwei Xiao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xiaoyu Ma
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China
| | - Tianzeng Gao
- Henan Ground Biological Science & Technology Co., Ltd., 3 Tanxiang Road, Zhengzhou 450001, China
| | - Xiumiao Zhou
- School of Chemical Engineering and Food Science, Zhengzhou University of Technology, 18 Yingcai Street, Zhengzhou 450044, China
| | - Yufei Wang
- School of Chemical Engineering and Food Science, Zhengzhou University of Technology, 18 Yingcai Street, Zhengzhou 450044, China
| | - Yong Guo
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Qing-Yun Chen
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Chao Liu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China
| |
Collapse
|
|
3
|
Zhu YY, Liu S, Huang Y, Qing FL, Xu XH. Photoredox catalyzed difluoro(phenylthio)methylation of 2,3-allenoic acids with {difluoro(phenylthio)methyl}triphenylphosphonium triflate. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.109969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
|
5
|
He ZL, Chen Y, Wang X, Ni M, Wang G. Access to thiomorpholin-3-one derivatives: [3 + 3]-cycloadditions of α-chlorohydroxamates and 1,4-dithiane-2,5-diol. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.07.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
|
6
|
Feng Y, Mo R, Wang L, Zhou C, Hong P, Li C. Surface Enhanced Raman Spectroscopy Detection of Sodium Thiocyanate in Milk Based on the Aggregation of Ag Nanoparticles. SENSORS (BASEL, SWITZERLAND) 2019; 19:E1363. [PMID: 30893770 PMCID: PMC6471654 DOI: 10.3390/s19061363] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 11/17/2022]
Abstract
A method is developed for detecting the concentration of sodium thiocyanate (NaSCN) in milk based on surface-enhanced Raman scattering (SERS) technology. A trichloroacetic acid solution can be used to enhance the SERS signal because of its function in promoting the aggregation of Ag nanoparticles (Ag NPs). Meanwhile, the protein in milk would be precipitated as trichloroacetic acid added and the interference from protein could be reduced during the detection. In this work, the enhancement factor (EF) is 7. 56 × 10⁵ for sodium thiocyanate in water and the limit of detection (LOD) is 0.002 mg/L. Meanwhile, this method can be used to detect the concentration of sodium thiocyanate in milk. Results show that SERS intensity increased as the concentration of sodium thiocyanate increase from 10 to 100 mg/L. The linear correlation coefficient is R² = 0.998 and the detection limit is 0.04 mg/L. It is observed that the concentration of sodium thiocyanate does not exceed the standard in the three kinds of milk. The confirmed credibility of SERS detection is compared with conventional methods.
Collapse
Affiliation(s)
- Yanting Feng
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Rijian Mo
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Ling Wang
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Chunxia Zhou
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China.
| | - Pengzhi Hong
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China.
| | - Chengyong Li
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China.
- School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China.
- Coastal Ecology Engineering Technology Research Center of Zhanjiang City, Guangdong Ocean University, Zhanjiang 524088, China.
| |
Collapse
|
|
7
|
Ou Y, Gooßen LJ. Copper‐Mediated Synthesis of (Diethylphosphono)difluoromethyl Thioethers from Diazonium Salts, NaSCN, and TMS‐CF
2
PO(OEt)
2. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800461] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yang Ou
- Fakultät für Chemie und BiochemieRuhr-Universität Bochum Universitätsstraße 150, ZEMOS 2.27 44801 Bochum Germany
| | - Lukas J. Gooßen
- Fakultät für Chemie und BiochemieRuhr-Universität Bochum Universitätsstraße 150, ZEMOS 2.27 44801 Bochum Germany
| |
Collapse
|