400643-82-5

Upstream product

• 400643-68-7 Acetic acid (3R,5S,6S)-6-[(3S,5S,8R,9S,10S,13S,14S)-3-(tert-butyl-diphenyl-silanyloxy)-10,13-dimethyl-2,3,4,5,6,7,8,9,10,11,12,13,14,15-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-5-hydroxy-3-isopropyl-heptyl ester 
• 400643-72-3 Acetic acid (3R,6S)-6-[(3S,5S,8R,9S,10S,13S,14S)-3-(tert-butyl-diphenyl-silanyloxy)-10,13-dimethyl-2,3,4,5,6,7,8,9,10,11,12,13,14,15-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-3-isopropyl-5-oxo-heptyl ester 
• 400643-61-0 (Z)-3β-[(tert-butyldiphenylsilyl)oxy]-5α-pregn-17-(20)-ene 
• 400643-64-3 3-(t-butyl)diphenylsiloxy-androstan-17-one 
• 400643-62-1 Acetic acid (R)-4-methyl-3-(2-oxo-ethyl)-pentyl ester 
• 82425-87-4 (R)-5-(1-methylethyl)-7-hydroxyheptan-2-one 
• 124484-44-2 Acetic acid (R)-3-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-4-methyl-pentyl ester 
• 124469-35-8 (R)-5-[2-(tert-Butyl-diphenyl-silanyloxy)-ethyl]-6-methyl-heptan-2-one 
• 105897-85-6 (R)-3-(1-methylethyl)-6-oxoheptanal dimethylacetal 
• 5989-27-5 D-limonene 
• 67304-08-9 (R)-3-isopropyl-6-oxoheptanal 
• 481-29-8 Epiandrosterone 
• 733744-34-8 (S)-3-(2,2-Dimethoxy-ethyl)-4-methyl-pentanoic acid methyl ester 
• 733744-33-7 (S)-3-Isopropyl-5,6-dioxo-heptanal 

Downstream Products

• 400643-57-4 (4S,6S)-6-{(S)-1-[(3S,5S,8R,9S,10S,13S,14S,17R)-3-(tert-Butyl-diphenyl-silanyloxy)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-ethyl}-4-isopropyl-tetrahydro-pyran-2-ol 

Relevant academic research and scientific papers

Studies towards the total synthesis of contignasterol

The (17R,20S,22S,24S) C20-C29 segment of contignasterol has been stereoselectively prepared in 8 steps and 40% overall yield from (S)-carvone. Synthetic studies towards contignasterol's C/D ring functionalization/isomerization are al

Stereocontrolled synthesis of contignasterol's side chain

The four models of the contignasterol's side chains (2-5) have been stereospecifically prepared. The key reaction in the synthesis is a dimethylaluminum chloride-mediated 'ene' reaction between the steroid derivative 6 and the pseudo-enantiomeric aldehydes 7 and 8.