1,3-Dithiolan-2-ones have been obtained by reaction of 1,3-dithiolane-2-thiones and epoxides in the presence of HBF,-Et,O. The reactions, carried out in anhydrous CH2Cl2 at 0-5 °C until room temperature (Procedure A) or in anhydrous chlorobenzene at 0-5°C until 80°C (Procedure B), gave product yields of 63- 95%. By Procedure B it was also possible to isolate the intermediates l-oxa-4,6,9-trithiaspiro[4.4]nonanes in good yields (66-85%). Reaction pathways are proposed
Convenient Procedure for Converting 1,3-Dithiolane-2-Thiones into 1,3-dithiolan-2-ones
BARBERO, Margherita;DEGANI, Jacopo;DUGHERA, Stefano;FOCHI, Rita;PISCOPO, Laura
1996-01-01
Abstract
1,3-Dithiolan-2-ones have been obtained by reaction of 1,3-dithiolane-2-thiones and epoxides in the presence of HBF,-Et,O. The reactions, carried out in anhydrous CH2Cl2 at 0-5 °C until room temperature (Procedure A) or in anhydrous chlorobenzene at 0-5°C until 80°C (Procedure B), gave product yields of 63- 95%. By Procedure B it was also possible to isolate the intermediates l-oxa-4,6,9-trithiaspiro[4.4]nonanes in good yields (66-85%). Reaction pathways are proposed
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