94669-79-1

Upstream product

• 26533-74-4 2-cis-1-acetoxy-5-(1'-hydroxy-2',2',6'-trimethyl-4'-oxocyclohexyl)-3-methylpent-2-en-4-yne 
• 49846-56-2 2-cis-5-(1'-hydroxy-2',2',6'-trimethyl-4'-oxocyclohexyl)-3-methylpent-2-en-4-yn-1-ol 
• 95307-31-6 2-cis-5-(4',4'-ethylenedioxy-1'-hydroxy-2',2',6'-trimethylcyclohexyl)-3-methylpent-2-en-4-yn-1-ol 
• 116-11-0 2-Methoxypropene 
• 20548-02-1 (4R,6R)-4-hydroxy-2,2,6-trimethylcyclohexan-1-one 
• 80713-62-8 5-(1-methoxy-1-methylethoxy)-3-methyl-3E-penten-1-yne 

Downstream Products

• 81749-12-4 (2Z,4E)-5-((1R,4R,6R)-1,4-Dihydroxy-2,2,6-trimethyl-cyclohexyl)-3-methyl-penta-2,4-dienal 
• 41967-83-3 Acetic acid (1R,4R,5R)-4-((1E,3Z)-5-acetoxy-3-methyl-penta-1,3-dienyl)-4-hydroxy-3,3,5-trimethyl-cyclohexyl ester 

Relevant academic research and scientific papers

87. Technical Procedures for the Syntheses of Carotenoids and Related Compounds from 6-Oxo-isophorone: Syntheses of (3R,3'R)-Zeaxanthin Part I

Starting from the readily available, optically active (4R)-4-hydroxy-2,2,6-trimethylcyclohexanone (1), a new technical synthesis of (3R,3'R)-zeaxanthin is described.According to a 2(C9 + C6) + C10= C40 construction scheme, the ketone 1 was first transformed with (E)-3-methylpent-2-en-4-yn-1-ol (5) into a C15-intermediate which, by a three-step sequence, could be converted into the known olefinic C15-Wittig salt 4.Optimized conditions for the final Wittig reaction of 4 with the C10-dialdehyde 3 are discussed.Based on 1, the overall yield of the entire technical process is ca. 40percent.

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