56052-61-0

Usage

Chemical compound

4-(2,6,6-Trimethyl-2-cyclohexen-1-ylidene)-2-butanone

Industry

Fragrance and flavor

Odor

Pleasant fruity and floral

Uses

Perfumes, colognes, scented products, flavoring agent in food and beverages

Aroma notes

Sweet, woody, fruity

Production

Synthetic musks

Upstream product

• 79-77-6 (E)-β-ionone 
• 79-77-6 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-buten-2-one 
• 52340-45-1 4c-(2,6,6-trimethyl-cyclohex-2-enyl)-but-3-en-2-one 
• 127-41-3 alpha-ionone 

Downstream Products

• 57461-21-9 (3E)-4-(2,3,6-trimethylphenyl)but-3-en-2-one 
• 165251-48-9 ethynyl-retro-α-ionone 

Relevant academic research and scientific papers

Method for preparing vitamin A

The invention relates to a process for making vitamin A from ethynyl-retro-α-ionol using an allene acetate as intermediate.

Photochemical transformations of terpenoids in the presence of cyclodextrins

The effect of complexation of terpene compounds with cyclodextrins on photolysis depends on the type of cyclodextrin and on the structure of the initial substrates. In some cases, only a change in the reaction rate is observed; in other cases, the complexation results in allylic rearrangements, hydride and acyl shifts, and cyclization with the formation of four-, five-, and six-membered cycles, whereas only cis-trans isomerization reactions are observed in the absence of complexation.

Intermediates for the preparation of vitamin A and carotenoids and process for their preparation

The present invention relates to novel intermediates for the preparation of vitamin A and carotenoids corresponding to the formula (II): STR1 in which A represents a hydrogen or an alkyl, alkenyl or alkoxy group containing 1 to 4 carbon atoms, and X repre

175. The Synthesis of β,γ- and α,β-Unsaturated Aldehydes via Polyene Epoxides

A substitute for the Darzens glycidic ester synthesis for converting unsaturated ketones or aldehydes into the homologated β,γ- or α,β-unsaturated aldehydes employing sulfur ylides is desribed.The carbonyl group is converted into the unsaturated oxirane which is then rearranged to the new aldehyde.High yields of isomerically pure aldehydes are available by this method and the process is of practical importance in the conversion of β-ionone into the β-C14-aldehyde, a key intermediate in the Isler synthesis of vitamin A.The efficient preparation of α- and β-cyclocitral by the novel process is also described.