Cp2TiCl2 is an efficient catalyst for the diastereoselective mono-oxidation of 2-substituted 1,3-dithianes and 1,3-dithiolanes by tert-butyl hydroperoxide comparable stereoselectivities and better yields than Ti(i-Pro)(4) were obtained. Activities are similar, provided activated 4Angstrom molecular sieves are present in the titanocene-promoted process. Furthermore, Cp2TiCl2, is a more moisture stable compound than Ti(i-PrO)(4) and therefore can be used in catalytic amounts of 1 mol%.
Titanocene dichloride as a convenient catalyst for the diastereoselective oxidation of 2-substituted 1,3-dithianes and 1,3-dithiolanes
DELLA SALA, Giorgio;LATTANZI, Alessandra;TEDESCO, Consiglia;SCETTRI, Arrigo
2002
Abstract
Cp2TiCl2 is an efficient catalyst for the diastereoselective mono-oxidation of 2-substituted 1,3-dithianes and 1,3-dithiolanes by tert-butyl hydroperoxide comparable stereoselectivities and better yields than Ti(i-Pro)(4) were obtained. Activities are similar, provided activated 4Angstrom molecular sieves are present in the titanocene-promoted process. Furthermore, Cp2TiCl2, is a more moisture stable compound than Ti(i-PrO)(4) and therefore can be used in catalytic amounts of 1 mol%.File in questo prodotto:
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