Structure and conformation of heterocycles. 13. conformational analysis of 2,3-DI(R)OXY-1,4-dioxanes: anomeric and gauche effects |
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Authors: | Benzion Fuchs Aviyakar Ellencweig Ulrich Burkert |
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Institution: | Department of Chemistry, Tel-Aviv University Ramat Aviv, 69978 Tel-Aviv Israel;Fakultät fur Chemie, Universität Konstanz Konstanz Federal Republic of Germany |
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Abstract: | A series of - and -2,3-di R)oxy-1,4-dIoxanes (R = Me,Ph, Ac) and some 2,5-disubstituted analogis were prepared and analysed by various NMR techniques. The isomers occur in more than 96% as diaxial conformers. Molecular mechanics calculations largely confirm these findings, which are interpreted -in terms of combined anomeric and gauche effects. |
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