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Gahlot S, Schmitt JL, Chevalier A, Villa M, Roy M, Ceroni P, Lehn JM, Gingras M. "The Sulfur Dance" Around Arenes and Heteroarenes - the Reversible Nature of Nucleophilic Aromatic Substitutions. Chemistry 2024:e202400231. [PMID: 38289151 DOI: 10.1002/chem.202400231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Indexed: 02/20/2024]
Abstract
We disclose the features of a category of reversible nucleophilic aromatic substitutions in view of their significance and generality in dynamic aromatic chemistry. Exchange of sulfur components surrounding arenes and heteroarenes may occur at 25 °C, in a process that one may call a "sulfur dance". These SN Ar systems present their own features, apart from common reversible reactions utilized in dynamic covalent chemistry (DCC). By varying conditions, covalent dynamics may operate to provide libraries of thiaarenes with some selectivity, or conversion of a hexa(thio)benzene asterisk into another one. The reversible nature of SN Ar is confirmed by three methods: a convergence of the products distribution in reversible SN Ar systems, a related product redistribution between two per(thio)benzenes by using a thiolate promoter, and from kinetic/thermodynamic data. A four-component dynamic covalent system further illustrates the thermodynamically-driven formation of a thiacalix[2]arene[2]pyrimidine by sulfur component exchanges. This work stimulates the implementation of reversible SN Ar in aromatic chemistry and in DCC.
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Affiliation(s)
- Sapna Gahlot
- Aix Marseille Univ, CNRS, CINaM, 13288, Marseille, France
| | - Jean-Louis Schmitt
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 allée Gaspard Monge, BP 70028, 67083, Strasbourg Cedex, France
| | - Aline Chevalier
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 allée Gaspard Monge, BP 70028, 67083, Strasbourg Cedex, France
| | - Marco Villa
- Aix Marseille Univ, CNRS, CINaM, 13288, Marseille, France
- Department of Chemistry ("Giacomo Ciamician"), University of Bologna, Via Selmi, 2, 40126, Bologna, Italy
| | - Myriam Roy
- Aix Marseille Univ, CNRS, CINaM, 13288, Marseille, France
- Institut Parisien de Chimie Moléculaire, Sorbonne Université, 75005, Paris, France
| | - Paola Ceroni
- Department of Chemistry ("Giacomo Ciamician"), University of Bologna, Via Selmi, 2, 40126, Bologna, Italy
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg, 8 allée Gaspard Monge, BP 70028, 67083, Strasbourg Cedex, France
| | - Marc Gingras
- Aix Marseille Univ, CNRS, CINaM, 13288, Marseille, France
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