85797-14-4

Upstream product

• 93488-44-9 (2R, 3S, 22R, 23E)-24-ethyl-6,6-ethylenedioxy-22-hydroxy-2,3-isopropylidenedioxy-5α-cholest-23-ene 
• 115268-00-3 (2R, 3S, 22R, 23S, 24S)-23,24-epoxy-24-ethyl-6,6-ethylenedioxy-22-hydroxy-2,3-isopropylidenedioxy-5α-cholestane 
• 81481-15-4 (20S)-6,6-ethylenedioxy-2α,3α-isopropylidenedioxy-5α-pregnane-20-carbaldehyde 
• 111426-38-1 Methanesulfonic acid (3S,5S,8S,9S,10R,13S,14S,17R)-17-{(S)-1-[(4R,5R)-5-((E)-1-isopropyl-propenyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-ethyl}-10,13-dimethyl-6-oxo-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester 
• 111426-36-9 (22R,23S,24R)-23,24-epoxy-3β,22-dihydroxy-5α-stigmastan-6-one 
• 111426-33-6 (22R,23R,24S)-3β-hydroxy-22,23-epoxy-5α-stigmastan-6-one 
• 81481-13-2 (22E,24S)-2α,3α-Dihydroxy-5α-stigmast-22-en-6-one 2,3-acetonide 
• 87240-49-1 (2R,3S)-23,24-Epoxy-24-ethyl-22-hydroxy-2,3-isopropylidenedioxy-5α-cholestan-6-one 
• 87240-48-0 (2R,3S)-24-Ethyl-22-hydroxy-2,3-isopropylidenedioxy-5α-cholest-23-en-6-one 
• 91413-00-2 (2R,3S,22R,24(28)E)-24-Ethylidene-22,23-dihydroxy-2,3-isopropylidenedioxy-5α-cholestan-6-one 
• 111426-40-5 (22R,23R,24(28)E)-22,23-isopropylidenedioxy-5α-stigmasta-2,24(28)-dien-6-one 
• 93488-46-1 (2R, 3S, 22R, 23R, 24(28)E)-6,6-ethylenedioxy-24(28)-ethylidene-22,22-dihydroxy-2,3-isopropylidenedioxy-5α-cholestane 
• 105319-59-3 (22R,23R,24(28)E)-3β,22,23-trihydroxy-5α-stigmast-24(28)-en-6-one 

Relevant academic research and scientific papers

Short-step Syntheses of Homodolicholide and Homodolichosterone

Short-step syntheses of homodolicholide 1 and homodolichosterone 2 are described.An (E)-geometry of their C(24)=C(28) double bond was established.Transformation reactions of the epoxy ring were applied to the syntheses, as was done in our syntheses of brassinolide and its related compounds.

SYNTHESIS OF NATURALLY OCCURRING BRASSINOSTEROIDS EMPLOYING CLEAVAGE OF 23,24-EPOXIDES AS KEY REACTIONS. SYNTHESIS OF BRASSINOLIDE, CASTASTERONE, DOLICHOLIDE, DOLICHOSTERONE, HOMODOLICHOLIDE, HOMODOLICHOSTERONE, 6-DEOXOCASTASTERONE AND 6-DEOXODOLICHOSTERONE

Eight new plant growth-promoting steroids (brassinolide, castasterone, dolicholide, dolichosterone, homodolicholide, homodolichosterone, 6-deoxocastasterone and 6-deoxodolichosterone) were synthesized by the regio- and stereoselective ring-opening reactions of 23,24-epoxides prepared from stigmasterol.