C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 47/21 (2006.01) C07C 45/51 (2006.01)
Patent
CA 2267506
A process for the manufacture of citral by the catalyzed rearrangement of dehydrolinalool to citral comprises carrying out the rearrangement in the presence of a molybdenum compound of the general formula MoO2X2 wherein X signifies an acetylacetonate or halide ion, and a dialkyl or diaryl sulphoxide as the catalyst system, in the presence of an organic acid having a pK value in the range of about 4.0 to about 6.5 and in an apolar aprotic organic solvent. Citral is a valuable intermediate for the synthesis of odorants, terpinoids and vitamins.
F. Hoffmann-La Roche Ag
Gowling Lafleur Henderson Llp
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