- Mild and efficient desulfurization of thiiranes with MoCl5/Zn system
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Desulfurization of a variety of thiiranes to alkenes occurs chemoselectively in high yields upon treatment with MoCl5/Zn system under mild conditions. The new methodology demonstrates high functional group tolerance toward chloro, bromo, fluoro, methoxy, ester, ether and keto groups.
- Yoo, Byung Woo,Lee, Yeong Jin,Shin, Jeong Won
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p. 124 - 131
(2021/11/10)
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- Selective and efficient desulfurization of thiiranes with Mo(CO)6
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Mo(CO)6 converts a broad range of thiiranes to the corresponding alkenes in high yields under neutral conditions. It has been found that this protocol is chemoselective and tolerates a variety of functional groups such as chloro, bromo, fluoro, ester, methoxy, ether and keto.
- Yoo, Byung Woo,Kim, Jung Youn
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- Convenient procedure for converting 1,3-dithiolane-2-thiones into 1,3-dithiolan-2-ones
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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.
- Barbero, Margherita,Degani, Iacopo,Dughera, Stefano,Fochi, Rita,Piscopo, Laura
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p. 289 - 294
(2007/10/03)
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- Synthesis and properties of alkane-1,2-disulfonate surfactants
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Synthesis of pure alkane-1,2-disulfonic acids was accomplished by oxidation of the corresponding 1,2-dithiols or cyclic trithiocarbonates. The dithiols were obtained from the epoxides via the thiiranes, or by reacting the corresponding olefin with S2Cl2 and subsequent treatment with NaHS. The trithiocarbonates were prepared by reaction of the epoxides with potassium O-methyl dithiocarbonate. The disodium salts of the 1,2-disulfonic acids exhibited surfactant properties with critical micelle concentration (CMC) values between 10-3 and 10-4 M. Acta Chemica Scandinavica 1996.
- Carlsen, Per H. J.,Rist, ystein,Maldal, Trygve,Vikane, Olav,Gilje, Eimund
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p. 158 - 163
(2007/10/03)
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