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EnglishTitanocene dichlorides and Ti(Oi-Pr)(4) have been used as catalysts for the oxidation with t-butyl hydroperoxide of racemic beta-hydroxysulfides having a stereogenic carbon centre in alpha- or beta- position with respect to the sulfur atom. beta-Hydroxysulfides were oxidized in high yields to the corresponding sulfoxides, titanocenes being more chemo- and generally more diastereoselective than Ti(Oi-Pr)(4). A divergent stereochemical outcome has been observed when using titanocenes or Ti(Oi-Pr)(4) in the oxidation of protected beta-hydroxy sulfides.
| Titolo: | Diastereoselective oxidation of hydroxysulfides with TBHP:a comparative study of titanocenes and Ti(OiPr)4, as catalysts |
| Autori: | |
| Data di pubblicazione: | 2002 |
| Rivista: | |
| Abstract: | Titanocene dichlorides and Ti(Oi-Pr)(4) have been used as catalysts for the oxidation with t-butyl hydroperoxide of racemic beta-hydroxysulfides having a stereogenic carbon centre in alpha- or beta- position with respect to the sulfur atom. beta-Hydroxysulfides were oxidized in high yields to the corresponding sulfoxides, titanocenes being more chemo- and generally more diastereoselective than Ti(Oi-Pr)(4). A divergent stereochemical outcome has been observed when using titanocenes or Ti(Oi-Pr)(4) in the oxidation of protected beta-hydroxy sulfides. |
| Handle: | http://hdl.handle.net/11386/1058696 |
| Appare nelle tipologie: | 1.1.2 Articolo su rivista con ISSN |
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