| abstract |
A method for producing alpha-dicarbonyl compounds of formula (I):wherein R<1 >and R<2>, independently of each other, mean C1-6-alkyl. In the method, an alpha,beta-unsaturated ketone of formula (II):wherein R<1 >and R<2 >have the meaning above and R<3 >and R<4>, independently of each other, mean hydrogen, C1-6-alkyl or di-C1-6-alkylamino, is reacted with ozone in the absence of a catalyst and the resultant ozonide is treated reductively. |