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US 8,802,898 B2Granted
Isomerization of β-keto-allenes
AssigneeDsm IP Assets B.V.
InventorsWerner Bonrath, Reinhard Karge, Thomas Netscher, Yann Pressel
Life of this patent
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Abstract
Isomerization of β-keto-allenes of the general formula I wherein R1 is hydrogen, methyl or ethyl, in particular hydrogen or methyl; R2 is hydrogen or methyl; R3 is hydrogen or methyl, in particular methyl and R4 is an aliphatic hydrocarbon residue containing 1-37 carbon atoms, into corresponding α,γ-dienones of formula II by treatment with a basic ion exchange resin.
Claims10
Isomerization of β-keto-allenes of the general formula
- wherein
- R1 is hydrogen, methyl or ethyl;
- R2 is hydrogen or methyl;
- R3 is hydrogen or methyl, and
- R4 is an aliphatic hydrocarbon residue containing 1-37 carbon atoms,
- into corresponding α,γ-dienones of formula
- by treatment with a basic ion exchange resin.
4 more elements
Dependencies are inferred from the claim text.