24364-93-0Relevant academic research and scientific papers
Solvent-Dependent Facile Synthesis of Diaryl Selenides and Biphenols Employing Selenium Dioxide
Quell, Thomas,Mirion, Michael,Schollmeyer, Dieter,Dyballa, Katrin M.,Franke, Robert,Waldvogel, Siegfried R.
, p. 115 - 119 (2016)
Biphenols are important structure motifs for ligand systems in organic catalysis and are therefore included in the category of so-called "privileged ligands". We have developed a new synthetic pathway to construct these structures by the use of selenium dioxide, a stable, powerful, and commercially available oxidizer. Our new, and easy to perform protocol gives rise to biphenols and diaryl selenides depending on the solvent employed. Oxidative treatment of phenols in acetic acid yields the corresponding biphenols, whereas conversion in pyridine results in the preferred formation of diaryl selenides. As a consequence, we were able to isolate a broad scope of novel diaryl selenides, which could act as pincer-like ligands with further applications in organic synthesis or as ligands in transition metal catalysis.
HETEROCYCLIC SELENABISPHOSPHITES AND PROCESS FOR PREPARATION THEREOF
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Paragraph 0119; 0120; 0121, (2017/09/02)
Novel heterocyclic selenabisphosphites, process for preparation thereof and use thereof as ligand unit for preparing ligands for use in complexes.
HETEROCYCLIC SELENAPHOSPHITES AND PROCESS FOR PREPARATION THEREOF
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Paragraph 0059-0060; 0061-0063; 0065-0066, (2017/06/27)
Novel heterocyclic selenaphosphites, process for preparation thereof and use thereof as ligand for employment in complexes.
HETEROCYCLIC SELENOPHOSPHITES AND METHOD FOR THE PREPARATION THEREOF
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Paragraph 0067-0072; 0073-0076;, (2017/07/06)
Novel heterocyclic selenophosphites, method for preparation thereof and use thereof as ligand unit for preparing ligands for use in complexes.
PROCESS FOR PREPARING 2,2'-SELENOBIARYL ETHERS OR 4,4'-SELENOBIARYL ETHERS USING SELENIUM DIOXIDE
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Paragraph 0149; 0150; 0168-0179; 0223, (2015/12/05)
A process for preparing a 2,2′-selenobiaryl ether or a 4,4′-selenobiaryl ether, proceeds by a) adding a first phenol to the reaction mixture, b) adding a second phenol to the reaction mixture, c) adding selenium dioxide to the reaction mixture, d) adding a base having a pKb in the range from 8 to 11 to the reaction mixture, and e) adjusting the reaction temperature of the reaction mixture such that the first phenol and the second phenol are converted to said 2,2′-selenobiaryl ether or said 4,4′-selenobiaryl ether.
