| 摘要 |
Acyloxy-2-butenes of the formula <IMAGE> I where R1, R3 and R4 are each hydrogen or alkyl of 1 to 5 carbon atoms, R2 is alkyl of 1 to 5 carbon atoms, R5 is hydrogen, alkyl of 1 to 5 carbon atoms or R6-CO-O, and R6 and R7 are each hydrogen, alkyl of 1 to 5 carbon atoms, phenyl or cyclohexyl, the preparation of these acyloxy-2-butenes by reaction of 1-acyloxy-1,3-butadienes of the formula <IMAGE> V with carboxylic acids of the formula R7-COOH and oxygen at 50 DEG -180 DEG C. in the presence of catalysts containing palladium or platinum, and the use of the compounds of the formula I, where R1, R3, R4 and R5 are hydrogen, R2 and R6 are methyl and R7 is methyl or ethyl, for the preparation of 4-acyloxytiglic aldehydes. |
