Process for preparing epoxides by oxidation of olefins using...

Details Process for preparing epoxides by oxidation of olefins using... Process for preparing epoxides by oxidation of olefins using...

C - Chemistry, Metallurgy

07

D

C07D 301/06 (2006.01) C07D 303/04 (2006.01) C07D 303/08 (2006.01)

Patent

CA 2295972

The invention relates to a method for epoxidizing alkenes of formula (1) in which R1, R2, R3 and R4 represent, independently from one another, hydrogen, C1-C20 alkyl, C1-C12 alkoxy, C6-C10 aryl, -CHOH-CH3, -CH-NH2-CH3 or carboxy, with air or oxygen, in the presence of a catalyst containing compounds of formula (2) MoxOy(L)z, in which x equals 1, 2 or 3, y represents an integral number from 0 to 2x + 1 and z represents an integral number from 1 to 2x, ligand L being an arylalkanol. The inventive method is characterised in that the reaction is carried out in a pressure vessel which is entirely coated with an inert material.

La présente invention concerne un procédé d'époxydation d'alcènes correspondant à la formule (1), dans laquelle R?1¿, R?2¿, R?3¿ et R?4¿ représentent, indépendamment l'un de l'autre, hydrogène, alkyle C¿1?-C¿20?, alcoxy C¿1?-C¿12?, aryle C¿6?-C¿10?, -CHOH-CH¿3?, -CH-NH¿2?-CH¿3? ou bien carboxy, avec de l'air ou de l'oxygène, sur un catalyseur contenant des composés de la formule (2) Mo¿x?O¿y?(L)¿z?, dans laquelle x vaut 1, 2 ou 3, y représente un nombre entier pouvant aller de 0 à 2x + 1 et z représente un nombre entier pouvant aller de 1 à 2x, le ligand L étant un arylalcanol. Ledit procédé se caractérise en ce que la réaction est réalisée dans un récipient sous pression qui est complètement revêtu d'un matériau inerte.

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