83020-76-2

Upstream product

• 80713-62-8 5-(1-methoxy-1-methylethoxy)-3-methyl-3E-penten-1-yne 
• 83020-75-1 oxophorone trimethylsilylenol ether 
• 83020-82-0 4-Hydroxy-4-[(E)-5-(1-methoxy-1-methyl-ethoxy)-3-methyl-pent-3-en-1-ynyl]-3,5,5-trimethyl-cyclohex-2-enone 

Downstream Products

• 83020-77-3 (1'E,3'E)-4-(5'-hydroxy-3'-methyl-1',3'-pentadienyl)-3,5,5-trimethyl-2-cyclohexen-1-on 
• 83020-85-3 4-((1E,3E)-5-Bromo-3-methyl-penta-1,3-dienyl)-3,5,5-trimethyl-cyclohex-2-enone 
• 83020-84-2 4-((1E,3E)-5-Chloro-3-methyl-penta-1,3-dienyl)-3,5,5-trimethyl-cyclohex-2-enone 
• 83020-78-4 <(2'E,4'E)-5'-(2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-3'-methyl-2',4'-pentadienyl>triphenylphosphonium chloride 
• 14656-56-5 3,3'-di-keto-β-carotene 
• 28840-14-4 3,7,12,16-tetramethyl-1,18-bis(2,6,6-trimethyl-4-oxo-2-cyclohexen-1-yl)-1,3,5,7,9,11,13,15,17-octadecanonaene 
• 116-30-3 4',5'-didehydro-4,5'-retro-β,β-carotene-3,3'-dione 

Relevant academic research and scientific papers

Process for the manufacture of cyclohexene derivatives

A novel process for the manufacture of cyclohexene derivatives which are suitable as intermediates for the manufacture of rhodoxanthin or zeaxanthin, as well as a process for the manufacture of rhodoxanthin or of zeaxanthin itself. The invention is also concerned with a novel starting material and novel intermediates in this process.

Polyene compounds

15,15'-Didehydro-astaxanthin and ester derivatives thereof useful as coloring agents and intermediates for astaxanthin and a method for preparing astaxanthin from keto α-isophorone and intermediates therein.