Krutin, Danil V. and Tsybulin, Semyon V. and Mulloyarova, Valeriya V. and Tupikina, Elena Yu. and Tolstoy, Peter M. and Antonov, Alexander S. (2025) Hydrogen-Bond-Assisted Chalcogen Transfer between Phosphine Selenides and Arsine Oxides. INORGANIC CHEMISTRY, 64 (19). pp. 9447-9456. ISSN 0020-1669, 1520-510X
Full text not available from this repository. (Request a copy)Abstract
The Br empty set nsted acid catalysis is widely regarded as one of the most effective methods for activating inert substrates and enabling unique reactivity. In this work, we introduce the first example of H-bond-assisted chalcogen exchange between arsine oxides and phosphine selenides under mild conditions, providing a powerful approach to the synthesis of arsine selenides. The reaction proceeds successfully in both protic and aprotic solvents and is accelerated by the presence of any nonaqueous acid. This newly discovered reaction is tested for various arsine oxides R3AsO (R = Ph, Et, nBu, iPr) and phosphine selenides R3PSe (R = Ph, Me, Et, tBu) and overall demonstrates high conversion, although the use of reagents with bulky substituents significantly hinders its efficiency. The reaction mechanism involves the formation of a four-membered cyclic transition state, which requires overcoming steric and electrostatic repulsion, as well as significant distortion of the reagents' tetrahedral geometry. Hydrogen bonding with the As=O fragment helps to reduce electrostatic repulsion between the P=Se and As=O groups, making the formation of the cyclic intermediate more favorable.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ACID; COMPLEXES; NMR; ORGANOCATALYSIS; SHIFTS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. Ruth Gschwind |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Jun 2026 09:45 |
| Last Modified: | 16 Jun 2026 09:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66280 |
Actions (login required)
 |
View Item |
