81306-52-7

Upstream product

• 55498-46-9 (3S,5,6S,3'R)-5,6-epoxy-3,3'-dihydroxy-7',8'-didehydro-5,6,7,8-tetrahydro-β,β-caroten-8-one-3,3'-diacetate 
• 70905-70-3 <1R,4S,5R-(E)>-4-(5-Acetoxy-3-methylpent-3-en-1-ynyl)-4-hydroxy-3,3,5-trimethylcyclohexyl acetate 
• 152187-03-6 <1R,4R,5R-(E)>-4-(5-Acetoxy-3-methylpent-3-en-1-ynyl)-4-hydroxy-3,3,5-trimethylcyclohexyl acetate 
• 157942-41-1 Acetic acid (R)-4-((E)-5-acetoxy-3-methyl-2-oxo-pent-3-enyl)-3,5,5-trimethyl-cyclohex-3-enyl ester 
• 169895-28-7 Acetic acid (R)-4-((E)-5-chloro-3-methyl-2-oxo-pent-3-enyl)-3,5,5-trimethyl-cyclohex-3-enyl ester 
• 169895-27-6 Acetic acid (R)-4-((E)-5-hydroxy-3-methyl-2-oxo-pent-3-enyl)-3,5,5-trimethyl-cyclohex-3-enyl ester 
• 157942-43-3 (2E,4E,6E,8E,10E)-13-(4-hydroxy-2,6,6-trimethylcyclohex-1-enyl)-2,7,11-trimethyl-12-oxotrideca-2,4,6,8,10-pentaenal 
• 158059-23-5 (2E,4E,6E,8Z,10E)-13-(4-hydroxy-2,6,6-trimethylcyclohex-1-enyl)-2,7,11-trimethyl-12-oxotrideca-2,4,6,8,10-pentaenal 
• 157942-46-6 Acetic acid (1R,5R)-4-[(E)-5-acetoxy-3-methyl-2-oxo-pent-3-en-(E)-ylidene]-3,3,5-trimethyl-cyclohexyl ester 
• 157942-40-0 Acetic acid (1R,5R)-4-[(E)-5-acetoxy-3-methyl-2-oxo-pent-3-en-(Z)-ylidene]-3,3,5-trimethyl-cyclohexyl ester 
• 169895-26-5 (3E,5E,7E,9E,11E,13E,15E)-1,18-Bis-((R)-4-hydroxy-2,6,6-trimethyl-cyclohex-1-enyl)-3,7,12,16-tetramethyl-octadeca-3,5,7,9,11,13,15-heptaen-17-yn-2-one 
• 5056-17-7 (2E,4E,6E)-2,7-dimethyl-2,4,6-octatrienedial 

Relevant academic research and scientific papers

Carotenoids and related polyenes. Part 3. First total synthesis of fucoxanthin and halocynthiaxanthin using oxo-metallic catalyst

The first total synthesis of optically active fucoxanthin 1 and halocynthiaxanthin 2 had been accomplished via the 8-oxo compound 5, efficiently prepared by rearrangement of the α-acetylenic alcohol 10 using oxo-metallic catalyst and subsequent iodine-catalysed double-bond shift.

Carotenoids of Sea Squirts. I. New Marine Carotenoids, Halocynthiaxanthin and Mytiloxanthinone from Halocynthia roretzi

New marine carotenoids, halocynthiaxanthin (4) and mytiloxanthinone (5), were isolated from the sea squirt, Halocynthia roretzi ("Maboya" in Japanese).The structures of 4 and 5 were established to be (3S,5R,6S,3'R)-5,6-epoxy-3,3'-dihydroxy-7',8'-didehydro