115350-52-2

Upstream product

• 103382-92-9 3α,6α-diacetoxy-5β-pregnane-20-carbaldehyde 
• 115368-99-5 Acetic acid (3R,5R,6S,8S,9S,10R,13S,14S,17R)-3-acetoxy-17-[(1S,2R)-2-hydroxy-1-methyl-2-((R)-3-methyl-5-oxo-2,5-dihydro-furan-2-yl)-ethyl]-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-6-yl ester 
• 115350-49-7 Propionic acid (3R,5R,6S,8S,9S,10R,13S,14S,17R)-17-[(1S,2R)-2-((2R,3S)-3,4-dimethyl-5-oxo-tetrahydro-furan-2-yl)-2-hydroxy-1-methyl-ethyl]-10,13-dimethyl-3-propionyloxy-hexadecahydro-cyclopenta[a]phenanthren-6-yl ester 
• 115369-00-1 (3S,4R,5R,6S)-6-((3R,5R,6S,8S,9S,10R,13S,14S,17R)-3,6-Dihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-2,3-dimethyl-heptane-1,4,5-triol 
• 115350-48-6 Acetic acid (3R,5R,6S,8S,9S,10R,13S,14S,17R)-3-acetoxy-17-[(1S,2R)-2-hydroxy-1-methyl-2-((2R,3S)-3-methyl-5-oxo-tetrahydro-furan-2-yl)-ethyl]-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-6-yl ester 
• 98-59-9 p-toluenesulfonyl chloride 
• 77-76-9 2,2-dimethoxy-propane 

Downstream Products

• 87734-68-7 typhasterol 

Relevant academic research and scientific papers

STUDY ON THE SYNTHESIS OF BRASSINOLIDE AND RELATED COMPOUNDS III STEREOSELECTIVE SYNTHESIS OF TYPHASTEROL FROM HYODEOXYCHOLIC ACID

Typhasterol 2 was synthesized stereoselectively from hyodeoxycholic acid 3.The aldehyde 5 derived from 3 was reacted with the anion of 3-methylbutenolide under kinetic condition to afford (22R,23R)-7 as the major product.Hydrogenation of 7 and its 22-acet