Journal of the Chemical Society. Perkin transactions I p. 289 - 294 (1996)
Update date:2022-08-03
Topics:
Barbero, Margherita
Degani, Iacopo
Dughera, Stefano
Fochi, Rita
Piscopo, Laura
1,3-Dithiolan-2-ones have been obtained by reaction of 1,3-dithiolane-2-thiones and epoxides in the presence of HBF4·Et2O. The reactions, carried out in anhydrous CH2Cl2 at 0-5°C→room temperature (Procedure A) or in anhydrous chlorobenzene at 0-5→80°C (Procedure B), gave product yields of 63-95%. By Procedure B it was also possible to isolate the intermediates 1-oxa-4,6,9-trithiaspiro[4,4]nonanes in good yields (66-85%). Reaction pathways are proposed.
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