208254-11-9

Upstream product

• 208254-09-5 (5S,7R,8R,9S,10S,13R,14S,17R)-17-((E)-(1R,4S)-4-Ethyl-1,5-dimethyl-hex-2-enyl)-7-hydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-one 
• 208254-08-4 (3S,5R,7R,8R,9S,10S,13R,14S,17R)-17-((E)-(1R,4S)-4-Ethyl-1,5-dimethyl-hex-2-enyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthrene-3,7-diol 
• 208254-07-3 (3S,5R,8R,9S,10S,13R,14S,17R)-17-((E)-(1R,4S)-4-Ethyl-1,5-dimethyl-hex-2-enyl)-3-hydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-7-one 
• 36449-99-7 7-oxostigmasterol 
• 83-48-7 Stigmasterol 
• 107-21-1 ethylene glycol 
• 208254-10-8 Benzoic acid (5S,7R,8R,9S,10S,13R,14S,17R)-17-((E)-(1R,4S)-4-ethyl-1,5-dimethyl-hex-2-enyl)-10,13-dimethyl-3-oxo-hexadecahydro-cyclopenta[a]phenanthren-7-yl ester 

Downstream Products

• 208254-13-1 (5α,7α)-3-spiro-2'-(1',3'-dioxolan)-24-oxocholest-22-en-7-yl benzoate 
• 208254-12-0 (5α,7α,20S)-3-spiro-2'-(1',3'-dioxolan)-20-methyl-21-oxopregnane-7-yl benzoate 

Relevant academic research and scientific papers

Stereoselective synthesis of 24-hydroxylated compounds useful for the preparation of aminosterols, vitamin D analogs, and other compounds

A method is described for stereoselectively reducing an unsaturated alkyl ketone substituent attached to a fused ring base. In this method, the unsaturated alkyl ketone reacts with a chiral oxazaborolidine reagent. This reaction stereoselectively reduces