145199-15-1

Upstream product

• 140925-07-1 (20S,22R,23R,24Z)-23-(1-ethoxyethoxy)-6-ethylenedioxy-2α,3α-isopropylidenedioxy-5α-cholest-24-eno-26,22-lactone 
• 129824-60-8 (20S,22R,23Z,25Z)-23,26-epoxy-6-ethylenedioxy-22-hydroxy-2α,3α-isopropylidenedioxy-5α-cholesta-23,25-diene 
• 78259-59-3 2-Bromo-4-methyl-furan 
• 145199-12-8 (20S,22R,23R,24R,25S)-23-(1-ethoxyethoxy)-6-ethylidenedioxy-2α,3α-isopropylidenedioxy-24-phenyl-5α-cholestano-26,22-lactone 
• 145199-13-9 (20S,22R,23R,24R,25S)-23-(1-ethoxyethoxy)-6-ethylidenedioxy-2α,3α-isopropylidenedioxy-24-phenyl-5α-cholestane-22,26-diol 
• 129824-62-0 (20S,22R,24Z)-22,26-epoxy-6-ethylenedioxy-26-hydroxy-2α,3α-isopropylidenedioxy-5α-cholest-24-en-23-one 
• 129824-64-2 (20S,22R,23R,24Z)-6-ethylenedioxy-23-hydroxy-2α,3α-isopropylidenedioxy-5α-cholest-24-eno-26,22-lactone 
• 129824-63-1 (20S,22R,24Z)-6-ethylenedioxy-2α,3α-isopropylidenedioxy-23-oxo-5α-cholest-24-eno-26,22-lactone 
• 81481-15-4 (20S)-6,6-ethylenedioxy-2α,3α-isopropylidenedioxy-5α-pregnane-20-carbaldehyde 
• 124-63-0 methanesulfonyl chloride 
• 145199-14-0 (20S,22R,23R,24R,25S)-6-ethylidenedioxy-22,23-ethylidenedioxy-2α,3α-isopropylidenedioxy-24-phenyl-5α-cholestan-26-ol 

Downstream Products

• 145199-04-8 24-phenylbrassinone 
• 145199-17-3 (20S,22R,23R,24R)-22,23-ethylidenedioxy-2α,3α-dihydroxy-24-phenyl-5α-cholestan-6-one 
• 145199-16-2 (20S,22R,23R,24R)-6-ethylidenedioxy-22,23-ethylidenedioxy-2α,3α-isopropylidenedioxy-24-phenyl-5α-cholestane 

Relevant academic research and scientific papers

Stereoselective Synthesis of Plant-Growth-Regulating Steroids: Brassinolide, Castasterone, and their 24,25-Substituted Analogues

Brassinosteroids and their congeners, brassinolide 1, castasterone 2, 25-methylbrassinolide 3, 25-methylcastasterone 4 and (24R)-24-phenylbrassinone 5, have been stereoselectively synthesized by employing the pyranone derivative 19 as a versatile intermediate for the construction of the side chain.