54200-91-8

Upstream product

• 103206-18-4 (E)-4-(2,3,4-Trimethyl-phenyl)-but-3-en-2-one 
• 54200-88-3 Methyl-3-methyl-5-(2,3,4-trimethylphenyl)-2-trans-4-pentadienoat 
• 122602-80-6 4-(2,3,4-trimethylphenyl)-but-3-en-2-one 
• 115376-74-4 5-(2,3,4-trimethylphenyl)-3-methyl-2,4-pentadienoic acid 
• 33398-38-8 2-Methyl-3-ethoxycarbonyl-2-propenyltriphenylphosphonium Bromide 
• 34341-28-1 2,3,4-trimethylbenzaldehyde 
• 6399-81-1 triphenylphosphine hydrobromide 
• 54200-90-7 5-(2,3,4-trimethylphenyl)-3-methyl-2,4-pentadienol 
• 122602-81-7 3-methyl-5-(2,3,4-trimethylphenyl)pent-1,4-dien-3-ol 
• 54200-75-8 3-Methyl-5-(2,3,6-trimethylphenyl)-2,4-pentadien-1-ol 
• 5758-24-7 bromotriphenylphosphonium bromide 

Downstream Products

• 54244-21-2 12'-apo-χ-caroten-12'-al 
• 122647-35-2 (2R,5R)-8-hydroxy-2-trimethylsilyloxy-κ,χ-caroten-6-one 
• 65252-71-3 (3S,5R)-8-hydroxy-3-trimethylsilyloxy-κ,χ-caroten-6-one 
• 55906-76-8 trikentriorhodin 
• 122647-34-1 (2R,5R)-2,8-dihydroxy-κ,χ,caroten-6-one 
• 122673-54-5 (5R)-8-hydroxy-κ,χ-caroten-6-one 
• 43161-28-0 9-cis-7,8-Didehydrorenieraten 
• 65252-74-6 methyl 8'-apo-χ-carotenoate 

Relevant academic research and scientific papers

Carotenoids and Related Compounds. Part 40. Synthesis of Trikentriorhodin and Other β-Diketones

Three routes to polyene β-diketones are described.Condensation of 8'-apo-β-carotenal (4) and of 8,8'-diapo-carotene-8,8'-dial (6) with butylamine in the presence of tri-isobutyl borate gave the Schiff's bases (5) and (7) respectively.These reacted with th

Animal carotenoids. 31. Structure elucidation of a sponge metabolite via mesylate elimination.

The structure of a sponge metabolite from Microciona prolifera, previously considered to be (6S)-2,3-didehydro- or 3,4-didehydro-gamma, chi-carotene, has been further studied. Attempted total synthesis of the 3,4-didehydro derivative provided the hitherto unknown gamma, chi-carotene, the synthesis of which is described. Hydrolysis of lutein methanesulfonate diester (dimesylate) gave elimination products possessing the 3,4-didehydro gamma end-group. 1H NMR data for this gamma end-group were identical with those for the sponge carotenoid. The mesylate elimination reaction described may mimic the metabolic formation of the 3,4-didehydro-gamma-carotenoid end-group. In connection with other investigations on functionalized carotenoids we further report the preparation of zeaxanthin and lutein mesylates and their base-catalyzed elimination reactions. SN2 type substitution reactions of zeaxanthin dimesylate with appropriate nucleophiles did not produce beta, beta-carotene, zeaxanthin diacetate or thiozeaxanthin.