Patent ID: 6090956
Filing Date: 2000-07-18
Classification: B01J,C07D

Abstract:
A process for preparing epoxides of the formula ##STR34## where R.sup.1 to R.sup.4 are identical or different and are hydrogen or substituted or unsubstituted alkyl, alkenyl, heteroalkyl, cycloalkyl, aryl or heteroaryl radicals, or the radicals R.sup.1 to R.sup.4 can also be linked to one another to form rings or are substituents based on elements of main groups IV to VII of the Periodic Table of the Elements, from olefins of the formula ##STR35## wherein bis(triorganosilyl) peroxides of the formulaR.sup.5 R.sup.6 R.sup.7 Si--OO--SiR.sup.5 R.sup.6 R.sup.7,where R.sup.5 to R.sup.7 are hydrocarbon radicals which may be unsubstituted or substituted by functional groups, are used as epoxidizing agents in the presence of activators based on metallic acid derivatives of the formula ##STR36## where M is a metal of transition groups IV to VII of the Periodic Table of the Elements,L are uncharged ligands selected from the group consisting of amine oxides, phosphine oxides, arsine oxides, stibine oxides, phosphoric triamides, formamides and pyridine N-oxides,X are anionic ligands selected from the group consisting of halides, alkyl groups, alkoxy groups, aryloxy groups, trialkylsilyl groups, hydroxyl groups, metallic anhydride groups of the formula --OMO.sub.x, carboxylic ester groups, sulfonic ester groups, phosphonic ester groups, carbonic ester groups, sulfuric ester groups, phosphoric ester groups, hydroperoxy groups, peroxyalkyl groups and triorganosilylperoxy groups, where two variables X can also represent a peroxo function,x is an integer from 1 to 5,y is 0, 1 or 2,z is 1 or 2 andn is 1 or 2,where two uncharged ligands L, two anionic ligands X or one uncharged ligand L and one anionic ligand X may be linked to a chelating ligand either directly or via an alkylene bridge.