90211-86-2

Upstream product

• 640-68-6 D-Val-OH 
• 17407-56-6 (R)-2-Hydroxy-3-methylbutyric acid 
• 873-55-2 sodium benzenesulfonate 
• 84994-63-8 (R)-2-benzyloxy-3-methyl-1-butanol 
• 51231-25-5 3α,5-cyclo-22-iodo-5α-23,24-bisnorcholan-6β-ol 6-methyl ether 
• 90211-83-9 methyl (R)-2-benzyloxy-3-methylbutanoate 
• 90244-32-9 (R)-methyl 2-hydroxy-3-methylbutanoate 
• 25819-77-6 (20S)-6β-methoxy-3α,5-cyclo-5α-pregnane-20-carbaldehyde 
• 51231-23-3 3α,5-cyclo-22-hydroxy-5α-23,24-bisnorcholan-6β-ol 6-methyl ether 
• 90211-84-0 (2R)-benzyloxy-3-methyl-1-iodobutane 
• 85639-62-9 3α,5-cyclo-22-phenylsulfonyl-5α-23,24-bisnorcholan-6β-ol 6-methyl ether 

Relevant academic research and scientific papers

A Stereoselective Synthesis and a Convenient Synthesis of Optically Pure (24 R)- and (24 S)-24-hydroxycholesterols

A new stereoselective synthesis of optically pure (24 S)-24-hydroxycholesterol (cerebrosterol) and (24 R)-24-hydroxycholesterol, using D- and L-valines as chiral sources, as well as a convenient synthesis, are described.