Process for preparing α-damascone
AssigneeBASF SE
InventorsStefan Rüdenauer, Thomas Fenlon, Shrirang Hindalekar, Nisha Pansare, Abhijeet Deb Roy, Vijay Narayanan Swaminathan
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Abstract
The present invention relates to a process for preparing 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one, which comprises a) providing 6,10-dimethylundeca-1,5,9-trien-4-ol, b) oxidizing 6,10-dimethylundeca-1,5,9-trien-4-ol provided in step a) with an oxidizing agent in the presence of at least one organic nitroxyl radical, at least one nitrate compound and an inorganic solid to yield 6,10-dimethylundeca-1,5,9-trien-4-one, c) reacting the 6,10-dimethylundeca-1,5,9-trien-4-one obtained in step b) with an acid to yield 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one.
Claims15
A process for preparing 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one, comprising:
- a) providing 6,10-dimethylundeca-1,5,9-trien-4-ol,
- b) oxidizing the 6,10-dimethylundeca-1,5,9-trien-4-ol provided in step a) with an oxidizing agent, which is selected from the group consisting of hypochlorites, hydrogen peroxide and molecular oxygen, in the presence of at least one organic nitroxyl radical, at least one nitrate compound and an inorganic solid, which is selected from the group consisting of alkali metal halides and alkali earth metal halides, to yield 6,10-dimethylundeca-1,5,9-trien-4-one,
- c) reacting the 6,10-dimethylundeca-1,5,9-trien-4-one obtained in step b) with an acid selected from mineral acids to yield 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one.
Dependencies are inferred from the claim text.