855474-14-5

Upstream product

• 64547-54-2 1-(3-Methyl-but-3-en-1-ynyl)-2,2,6-trimethyl-cyclohexanol 
• 55497-48-8 2,6,6-trimethyl-1-(3'-methyl-but-1'-yn-3'-en-1'-yl)-cyclohex-1-ene 
• 122-51-0 orthoformic acid triethyl ester 
• 69037-27-0 1-[3-Methyl-3,5,5-triethoxy-pent-1-yn-1-yl]-2,6,6-trimethylcyclohex-1-ene 
• 78-80-8 2-methylbut-1-en-3-yne 
• 2408-37-9 2,2,6-trimethylcyclohexan-1-one 
• 187409-93-4 1-(5-hydroxy-3-methyl-pent-3-en-1-ynyl)-2,2,6-trimethyl-cyclohexanol 

Downstream Products

• 72834-86-7 6-methyl-8-(2,6,6-trimethyl-cyclohex-1-enyl)-octa-3,5-dien-7-yn-2-one 
• 72834-88-9 1-Chlor-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexenyl)-2,4,6-nonatrien-8-in 
• 72834-89-0 1-Brom-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexenyl)-2,4,6-nonatrien-8-in 
• 72834-87-8 1-[3,7-Dimethyl-nona-1-yne-3,5,8-trien-7-ol-1-yl]-2,6,6-trimethyl-cyclohex-1-ene 
• 69037-22-5 3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexenyl)-2,4,6-nonatrien-8-in-1-yl-acetat 

Relevant academic research and scientific papers

Cyclohexene carotinoid intermediates

1-[3-Methyl-3,5,5-trialkoxy-pent-1-yn-1-yl]-2,6-dimethyl-cyclohex-1-enes, which may or may not be methyl-substituted in the 2- and/or 6-position, are obtained by reacting the corresponding 1-[3-methyl-but-1-yn-3-en-1-yl]-2,6-dimethyl-cyclohex-1-enes with orthoformic acid esters in the presence of acid condensing agents. The new compounds provide a new method of access to the compounds of carotinoid chemistry, especially to vitamin A, which avoids the conventional expensive synthesis via phosphorus ylide compounds.