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Lee S, Sim J, Lee A. Base-Catalyzed One-Pot Synthesis of Selenosulfides: A Base Basicity-Controlled Approach. J Org Chem 2024; 89:748-755. [PMID: 38127795 DOI: 10.1021/acs.joc.3c02126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
We developed a novel and efficient sequential one-pot synthesis of selenosulfides via a base-catalyzed methodology utilizing readily available starting compounds, under mild reaction conditions. This method eliminated the need for excess oxidants or additives and simplified the synthesis procedure. Furthermore, organic amine bases served as exceptional catalysts for synthesizing the target products. The performance of a catalytic system depends on the basicity of the bases. The selection of suitable bases, based on their pKaH values, is crucial for the selective synthesis of selenosulfides without the formation of byproducts. This method provides a direct route for the preparation of selenosulfides, which are important scaffolds in organic chemistry.
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Yang K, Luo Y, Hu Q, Song M, Liu J, Li Z, Li B, Sun X. Selective C(sp 3)-S Bond Cleavage of Thioethers to Build Up Unsymmetrical Disulfides. J Org Chem 2023; 88:13699-13711. [PMID: 37747962 DOI: 10.1021/acs.joc.3c01355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
The selective C(sp3)-S bond cleavage of thioethers was first developed to prepare unsymmetrical disulfides by using electrophilic halogenation reagents. In this strategy, NBS (N-bromosuccinimide) achieves selective furfuryl C(sp3)-S bond cleavage of furfuryl alkylthioethers at room temperature. Meanwhile, NFSI (N-fluorobenzenesulfonimide) enables selective methyl C(sp3)-S bond cleavage of aryl and alkyl methylthioethers at an elevated temperature. Notably, the substrate scope investigation indicates that the order of selectivity of the C-S bond cleavage is furfuryl C(sp3)-S > benzyl C(sp3)-S > alkyl C(sp3)-S > C(sp2)-S bond. Moreover, this practical and operationally simple strategy also provides an important complementary way to access various unsymmetrical disulfides with excellent functional group tolerances and moderate to good yields.
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Affiliation(s)
- Ke Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Yanqi Luo
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Qingyue Hu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Mengjie Song
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Junxiang Liu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Zhengyi Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Bijin Li
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Xiaoqiang Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
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