95307-42-9

Upstream product

• 14203-67-9 2,2,6-trimethyl-1,4-cyclohexanedione 4-ethylene acetal 
• 98665-95-3 ethyl (1S,4R,6R)-4-hydroxy-1-(5-hydroxy-3-methyl-3E-penten-1-ynyl)-2,2,6-trimethylcyclohexylcarbonate 
• 1907-33-1 lithium tert-butoxide 
• 75-65-0 tert-butyl alcohol 
• 98665-97-5 (1S,4R,6R)-4-hydroxy-1-(5-hydroxy-3-methyl-3E-penten-1-ynyl)-2,2,6-trimethylcyclohexyl benzoate 
• 70905-70-3 2-trans-5-(4'-acetoxy-1'-hydroxy-2',2',6'-trimethylcyclohexyl)-1-acetoxy-3-methylpent-2-en-4-yne 
• 95307-31-6 2-trans-5-(4',4'-ethylenedioxy-1'-hydroxy-2',2',6'-trimethylcyclohexyl)-3-methylpent-2-en-4-yn-1-ol 
• 26533-75-5 2-trans-5-(1',4'-dihydroxy-2',2',6'-trimethylcyclohexyl)-3-methylpent-2-en-4-yn-1-ol 
• 49846-56-2 2-trans-5-(1'-hydroxy-2',2',6'-trimethyl-4'-oxocyclohexyl)-3-methylpent-2-en-4-yn-1-ol 
• 6153-06-6 (E)-3-methylpent-2-en-4-yn-1-ol 
• 95343-64-9 2-trans-1-acetoxy-5-(4'-acetoxy-2',2',6'-trimethylcyclohex-1'-enyl)-3-methylpent-2-en-4-yne 
• 160332-73-0 (-)-(1'R,4'R,6'R)-(Z)-5-(1',4'-dihydroxy-2',2',6'-trimethylcyclohexyl)-3-methyl-2-penten-4-yn-1-ol 
• 152125-31-0 (4R,6R)-2,2,6-Trimethyl-4-trimethylsilanyloxy-cyclohexanone 
• 20548-02-1 (4R,6R)-4-hydroxy-2,2,6-trimethylcyclohexan-1-one 

Downstream Products

• 95307-34-9 3,5,5-Trimethyl-4-[(3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyl-18-(2,6,6-trimethyl-cyclohex-2-enyl)-octadeca-3,5,7,9,11,13,15,17-octaen-1-ynyl]-cyclohex-3-enol 
• 26533-78-8 9-trans-3-hydroxy-7,8-didehydro-12'-apo-β-caroten-12'-al 
• 95343-65-0 2-trans-5-(4'-hydroxy-2',2',6'-trimethylclohex-1'-enyl)-3-methylpent-2-en-4-yn-1-yltriphenylphosphonium bromide 
• 144-68-3 zeaxanthin 
• 70267-38-8 9-Z-(3R,3'R)-diatoxanthin 
• 160332-75-2 2-Z-5-((4'R)-4'-hydroxy-2',2',6'-trimethylcyclohex-1'-enyl)-3-methyl-2-penten-4-yn-1-al 

Relevant academic research and scientific papers

Total synthesis of acetylenic carotenoids. 3. First total synthesis of optically active 9-Z-(3R,3'R)-diatoxanthin and 9-Z-(3R)-7,8-didehydrocryptoxanthin.

Optically active 9-Z-(3R,3'R)-diatoxanthin and 9-Z-(3R)-7,8-didehydrocryptoxanthin were synthesised in an overall yield of 9percent and 11percent respectively, with a seven step C9+C6+C25=C40 strategy.A key intermediate was the previously undescribed C15-

Substituted alkynes useful as intermediates in the synthesis of carotenoids

Compounds of the formula STR1 wherein n is either 0 or 1; R1 and R2 is hydrogen and the other is hydrogen, hydroxy, oxo group, a protected hydroxy or protected oxo group; R3 is hydroxy oxo group, =CH--CH2 --OH, =CH--CHO or one of the foregoing groups where the hydroxy or oxo functions are protected; R4 is --CO--OR6, --CO--R6, --CO--NR6 R7, --CO--Cl or --SO2 --R6 ; R6 is saturated or aromatic hydrocarbon; and R7 is saturated or aromatic hydrocarbon or hydrogen, are converted by cleavage of R4 OH into corresponding cycloalkenes and protecting groups, if present, are hydrolyzed. The compounds obtained are valuable intermediates in carotenoid syntheses.

Carotenoids and Related Compounds. Part 38. Synthesis of (3RS,3'RS)-Alloxanthin and Other Acetylenes

The all-trans, 9-cis, and 9,9'-di-cis forms of (3RS,3'RS)-alloxanthin have been synthesized, also the 9-cis-isomer of (3RS,6'RS)-crocoxanthin.Perhydrogenation of alloxanthin gives a product with the same optical properties as perhydrozeaxanthin.These resu