Manganese 2,6-disubstituted tetraphenylporphyrins, bearing halogen atoms on the beta-positions, have been used as catalysts for the first described stereoselective epoxidation of thymidine nucleosides. The oxidations were carried out using dimethyldioxirane (DMDO) as the oxygen atom donor. The diastereoisomeric ratio of the final epoxides might be related to the hydrogen-bonding interaction between the OH groups of the sugar moieties and the OCH3 groups of the catalysts during the approach of the nucleosides to the core of the macrocycles.
Tagliatesta, P., Bernini, R., Crestini, C., Monti, D., Boschi, T., Mincione, E., et al. (1999). Manganese tetraphenylporphyrin-catalyzed stereoselective epoxidation of thymidine nucleosides. JOURNAL OF ORGANIC CHEMISTRY, 64(15), 5361-5365 [10.1021/jo980940q].
Manganese tetraphenylporphyrin-catalyzed stereoselective epoxidation of thymidine nucleosides
TAGLIATESTA, PIETRO;CRESTINI, CLAUDIA;MONTI, DONATO;BOSCHI, TRISTANO;
1999-01-01
Abstract
Manganese 2,6-disubstituted tetraphenylporphyrins, bearing halogen atoms on the beta-positions, have been used as catalysts for the first described stereoselective epoxidation of thymidine nucleosides. The oxidations were carried out using dimethyldioxirane (DMDO) as the oxygen atom donor. The diastereoisomeric ratio of the final epoxides might be related to the hydrogen-bonding interaction between the OH groups of the sugar moieties and the OCH3 groups of the catalysts during the approach of the nucleosides to the core of the macrocycles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
