[en] Two efficient phase-transfer-catalyzed protocols for the diastereoselective synthesis of cis and trans isomers of 2,6-diaryltetrahydrothiopyran-4-ones (2,6-DATHTPs) have been developed. In a study of the scope of the reactions, differently substituted 2,6-DATHTPs were successfully accessed in high yields and diastereomeric excessses on both experimental and preparative scales.
Research Center/Unit :
European School of Chemistry, Polymers and Materials, Bioorganic and Medicinal Chemistry, UMR CNRS 7509
Disciplines :
Chemistry
Author, co-author :
Gendron, Thibault ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie organique-nucléaire ; European School of Chemistry, Polymers and Materials, Bioorganic and Medicinal Chemistry, UMR CNRS 7509, France
Kessedjian, Hripsimée; European School of Chemistry, Polymers and Materials, Bioorganic and Medicinal Chemistry, UMR CNRS 7509, France
Davioud-Charvet, Elisabeth; European School of Chemistry, Polymers and Materials, Bioorganic and Medicinal Chemistry, UMR CNRS 7509, France
Lanfranchi, Don Antoine; European School of Chemistry, Polymers and Materials, Bioorganic and Medicinal Chemistry, UMR CNRS 7509, France
Language :
English
Title :
Diastereoselective Synthesis of 2,6-Diaryltetrahydrothiopyran-4-ones by Phase-Transfer Catalysis
This work was supported by the Centre National de la Recherche Scientifique (CNRS) (UMR7509, grant to E. D.-C.) and the Laboratoire d'Excellence (LabEx) ParaFrap (grant LabEx ParaFrap ANR-11-LABX-0024 to E. D.-C.). T. G. is grateful to the French Ministry of Research for funding his Ph. Dissertation. The authors would like to thank Xavier Martin-Benlloch and Dr. Kerstin Sander for their precious help and advice.
M.R.Detty,J.A.Sinicropi,R.J.Cowdery-Corvan,R.H.Young, Electrophotographic Elements and Soluble Cyclic Sulfone Electron Transport Agents, EP0691579A1, 1996.
The racemic (±)-trans isomer will be further abbreviated to trans isomer.
Krein, E.B., Aizenshtat, Z., J. Org. Chem. 58 (1993), 6103–6108.
.
Jones, R.A., Quaternary Ammonium Salts: Their Use in Phase-Transfer Catalysed Reactions, 2001, Academic Press, San Diego.
Nakayama, J., Machida, H., Hoshino, M., Tetrahedron Lett. 24 (1983), 3001–3004.
Compound 1a was used as a prototypical substrate for preliminary investigations as the resulting two diastereoisomers were clearly characterized and could be separated and quantified by HPLC and NMR spectroscopy, see the Supporting Information.
Baxter, C.A.R., Whiting, D.A., J. Chem. Soc. C, 1968, 1174–1178.
CCDC-1031022 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
Giggenbach, W., Inorg. Chem. 10 (1971), 1333–1338.