Method for Preparing Ss-Ketocarbonyl-Functional Organo-Silicium Compounds

A process for preparing β-ketocarbonyl-functional organosilicon compounds, comprising reacting diketenes (1) of the formula

• where
• R3 is a hydrogen atom or a hydrocarbon radical having from 1 to 18 carbon atoms, with organosilicon compounds (2) which contain at least one Si-bonded radical A of the formula
• —R1—NR22 (2)
• where
• R1 is a divalent organic radical which has from 2 to 10 carbon atoms, optionally containing one or more heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen,
• R2 is a hydrogen atom or an organic radical which has from 1 to 100 carbon atoms and optionally contains nitrogen atom(s),
• with the proviso that the radical A of the formula (II) has at least one primary amino group and optionally one or more secondary amino groups,
• the reaction taking in the presence of organic compounds (3) which retard or prevent the reaction of primary or secondary amino groups with β-ketocarbonyl compounds.