C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 67/03 (2006.01) C07C 69/716 (2006.01) C07C 69/738 (2006.01) C07D 309/38 (2006.01)
Patent
CA 2541843
The invention relates to a method for the production of 6,6,6-trihalo-3,5- dioxohexanic acid esters of formula (I) in addition to the enols thereof and <I>E</I> and <I>Z</I> isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. The invention also relates to a method for the production of enol ethers of formula (Ib) and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meaning.
L'invention concerne un procédé servant à produire des esters de l'acide 6,6,6-trihalo-3,5-dioxohexanoïque de formule (I) ainsi que leurs énols et leurs isomères <I>E</I> et <I>Z</I>. Dans la formule (I), les X représentent indépendamment les uns des autres fluor, chlore ou brome et R?1¿ représente alkyle, cycloalkyle, aryle ou aralkyle. L'invention concerne également un procédé servant à produire des éthers énoliques de formule (Ib) et leurs énols (isomères <I>E</I> et <I>Z</I>), X et R?1¿ ayant la signification susmentionnée.
Hanselmann Paul
Wenger Wolfgang
G. Ronald Bell & Associates
Lonza Ag
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