|
|||||
|
|
Synthesis and Stereochemistry of New Bis(1,3-Oxathian-2-yl) Derivatives: Epimerisation and Chair–Twist Equilibria |
|
| Authors: | C Cismaş I Grosu G Plé E Condamine Y Ramondenc L Toupet I Silaghi-Dumitrescu G Nemeş A Terec L Muntean |
| Institution: | (1) Faculty of Chemistry and Chemical Engineering, “Babes-Bolyai” University, 11 Arany Janos Street, 400028 Cluj-Napoca, Romania;(2) Faculté des Sciences, Université de Rouen et IRCOF, UMR A-6014, 76821 Mont Saint-Aignan Cedex, France;(3) Université de Rennes 1, UMR C-6626, Bat. 11A, Campus de Beaulieu, 35042 Rennes Cedex, France |
| Abstract: | The synthesis and stereochemistry of some new bis(1,3-oxathian-2-yl) derivatives are reported. The conformational behavior of these compounds and the orientation of their substituents are deduced from the NMR spectra, from the X-ray crystal structures of two compounds and from the ab-initio level calculations. The epimerization of diastereoisomers and the chair ⇌ 22,5-twist equilibria were studied by variable temperature NMR. |
| Keywords: | 1 3-Oxathianes epimerisation of diastereoisomers X-ray structures variable temperature NMR ab-initio level calculations |
| 本文献已被 SpringerLink 等数据库收录！ | |