20489-19-4

Upstream product

• 41703-37-1 Acetic acid (1S,3R)-6-(3-acetoxy-but-1-ynyl)-1,5,5-trimethyl-7-oxa-bicyclo[4.1.0]hept-3-yl ester 
• 41703-37-1 Acetic acid (1S,3S,6S)-6-(3-acetoxy-but-1-ynyl)-1,5,5-trimethyl-7-oxa-bicyclo[4.1.0]hept-3-yl ester 
• 122203-81-0 (+/-)-(2E,4S)-5-((2S,4S)-2,4-dihydroxy-2,6,6-trimethylcyclohexylidene)-3-methylpenta-2,4-dien-1-ol 
• 31162-44-4 Acetic acid 4-(3-acetoxy-but-1-ynyl)-3,5,5-trimethyl-cyclohex-3-enyl ester 
• 130224-10-1 (1'R,2'R,4'R,2'RS)-4-<1',2'-Epoxy-2',6',6'-trimethyl-4'-<(triethylsilyl)oxy>cyclohexyl>but-3-in-2-ol 
• 20548-02-1 (4R,6R)-4-hydroxy-2,2,6-trimethylcyclohexan-1-one 
• 31162-44-4 2-acetoxy-4-[[4R]-4-acetoxy-2,6,6-trimethyl-cyclohex-1-en-1-yl]-but-3-yne 
• 108543-35-7 icariside B₁ 
• 23811-29-2 (4S,6R)-1-(3-Hydroxy-but-1-ynyl)-2,2,6-trimethyl-4,6-bis-trimethylsilanyloxy-cyclohexanol 
• 108567-70-0 cinnamoside 
• 809281-50-3 (1R,3S)-6-((R)-3-Hydroxy-but-1-enylidene)-1,5,5-trimethyl-cyclohexane-1,3-diol 
• 809281-50-3 (1R,3S)-6-((S)-3-Hydroxy-but-1-enylidene)-1,5,5-trimethyl-cyclohexane-1,3-diol 
• 120330-44-1 citroside A <(5-dehydroxygrasshopper ketone-5-yl) 5-β-D-glucopyranoside> 
• 130224-14-5 4-((2R,4S)-2-Hydroxy-2,6,6-trimethyl-4-triethylsilanyloxy-cyclohexylidene)-but-3-en-2-one 

Downstream Products

• 130224-16-7 (1'R,2'R)-4-(2'-hydroxy-2',6',6'-trimethyl-4'-oxocyclohexyliden)but-3-en-2-on 

Relevant academic research and scientific papers

Norsesquiterpenoid and sesquiterpenoid glycosides from Evodia austrosinensis

Two new norsesquiterpenoid glycosides named austrosides A and B, together with four known glycosides, corchoionoside B, citroside A, icariside B 1 and dihydrophaseic acid 4′-O-β-D-glucopyranoside were isolated from Evodia austrosinensis. Their structures were elucidated by 1D and 2D NMR data. Austroside A showed antibacterial activity against the Staphylococcus aureus antibiotic resistant strain.

Stereocontrolled synthesis of glucosidic damascenone precursors

A stereocontrolled synthesis of optically active β-D-glucopyranosides and glucosidic damascenone precursors was discussed. The method used was asymmetric transfer hydrogenation to α, β-acetylenic ketones catalyzed by chiral ruthenium complexes. To facilitate the confirmation of the stereochemistries of natural glucosides, separation of synthetic four isomers by HPCL was examined.

72. Synthesis of Optically Pure Grasshopper Ketone and its Diastereoisomers and Related Compounds

Starting from our previously described synthon 1, the synthesis of four enantiomerically pure grasshopper ketons (diastereoisomeric 4-(2',4'-dihydroxy-2',6',6'-trimethylcyclohexylidene)but-3-en-2-ons) and of their oxo derivatives was performed.Spectral an

CLAIMED 6R/6S ALLENE ISOMERIZATION IN CAROTENOIDS IS GEOMETRICAL 9-TRANS/9-CIS ISOMERIZATION

Previously claimed isolations of (S) allene isomers of natural carotenoids have been disproved.Detailed 1H NMR have demonstrated that these isomers are geometrical isomers with the cis-bond adjacent to the allenic bond.

Studies on the Constituents of Leaves of Citrus unshiu MARCOV.

Two new glycosides citroside A (3) and B (4), together with 2-phenylethyl β-D-glucopyranoside (1) and 2-phenylethyl D-rutinoside (2), were isolated from the methanol extract of leaves of Citrus unshiu, in addition to two known terpenoids, limonin (5) and