Process for making 1,3-diene hydrocarbons
AssigneeGivaudan SA
InventorsKlaus-Jurgen Ploner, Jost Wild, Trudi Sigg-Grutter
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Abstract
Unsaturated compounds of the general formula: ##SPC1## Wherein R is defined hereinafter are prepared.
Claims9
A process for the manufacture of unsaturated compounds of the general formula ##SPC4##
- wherein R represents the ethyl group of a grouping of the formula
- (CH.sub.3).sub.2 C=CH--CH.sub.2 --, ##EQU2##
- R.sup.2 OCH.sub.2 --CH.sub.2 --
- or
- R.sup.3 OCO--CH.sub.2 --
- in which R.sup.1 represents a hydrogen atom or a lower alkyl or lower acyl group, R.sup.2 represents a lower alkyl or lower acyl group and R.sup.3 represents a lower alkyl group,
- which process comprises treating at 0.degree. to 50.degree.C. a compound of the general formula ##SPC5##
- wherein R has the significance given earlier in this claim, or cis-ocimene in the presence of a lower aliphatic alcohol with Rh(NO.sub.3).sub.3, and a carboxylic acid chloride selected from the group consisting of aromatic carboxylic acid chlorides and lower aliphatic carboxylic acid chlorides.
A process for making ocimene, which comprises reacting myrcene with Rh(NO.sub.3).sub.3 and acetyl chloride in the presence of isopropanol at a temperature of about 20.degree.C for about 24 hours.
A process which comprises reacting cis-ocimene in isopropanol for about 2 hours at 50.degree.C with Rh(NO.sub.3).sub.3 and acetyl chloride.
A process which comprises reacting .beta.-farnesene in isopropanol with Rh(NO.sub.3).sub.3 and acetyl chloride at about 20.degree.C for about 16 hours.
A process which comprises reacting .beta.-sinensal for about 1 hour at around 50.degree.C under argon in the presence of isopropanol with Rh(NO.sub.3).sub.3 and acetyl chloride.
Dependencies are inferred from the claim text.