41436-46-8

Upstream product

• 58254-15-2 (3-Brom-2,6,6-trimethylcyclohex-1-en-1-yl)-methyl-keton 
• 102676-97-1 1-(2,6,6-trimethyl-1,3-cyclohexadienyl)ethanol 
• 471-90-9 2,6,6-trimethyl-cyclohex-1-enecarboxylic acid 
• 1197-92-8 1-(2,6,6-trimethyl-cyclohex-1-enyl)-ethanone 
• 116-26-7 safranal 

Downstream Products

• 23726-93-4 Damascenon 
• 41436-47-9 9-hydroxymegastigma-3,5-dien-7-one 
• 19620-37-2 (+/-)-4-hydroxy-2,6,6-trimethyl-2-cyclohexenone 

Relevant academic research and scientific papers

Photochemical Reactions. 145th Communication. Carbonyl vs. Epoxyketone Photochemistry: Photolysis of 1,2;3,4-Diepoxy-2,6,6-trimethyl-1-cyclohexyl Methyl Ketone

The synthesis and photolysis of the title compound 3 is described.Irradiation (λ > 280 nm, MeCN) of the di-epoxyketone 3 leads predominantly to γ-H abstraction.Cyclization furnishes the cyclobutanols 22-24, while cleavage gives compound 25, presumably via the allene-oxide intermediate 36.Further, products 27 and 28 are formed by Norrish fragmentation and by initial cleavage of the C(α)-O bond of the oxirane, respectively.The structures of the products 22-25, 27, and 28 were assigned on the basis of the spectral data of the photolysis products of the 13C-labelled diepoxyketone -3 and by X-ray analysis of the compounds 24 and 35, the latter being the p-nitrobenzoate of 22.

Oxygenated alicyclic compounds and process for preparing same

New oxygenated alicyclic compounds of formula STR1 (X=OH, alkyl, O-alkyl) are useful as starting materials for the preparation of cyclohexadienic derivatives of formula STR2 (X=OH, alkyl, O-alkyl). They are converted into compounds (III) by treating them with an acidic dehydrating agent in the presence of an inert organic solvent. Compounds (I) are manufactured by reacting compounds (II) STR3 (X=OH, alkyl, O-alkyl) with an organic peracid.