215022-86-9

Upstream product

• 75-77-4 chloro-trimethyl-silane 
• 189080-80-6 3-methyl-2-<(phenylsulfonyl)methyl>-1-butanol 
• 215022-83-6 benzoic acid 2-benzenesulfonylmethyl-3-hydroxy-3-methyl-butyl ester 
• 215022-84-7 benzoic acid 2-benzenesulfonylmethyl-3-methyl-but-3-enyl ester 
• 215022-82-5 3-methyl-2-(phenylsulfonylmethyl)butane-1,3-diol 
• 215022-85-8 3-methyl-2-(phenylsulfonylmethyl)-3-buten-1-ol 
• 556-82-1 3-methyl-2-buten-1-ol 
• 18511-56-3 (3,3-dimethyloxiranyl)methanol 

Downstream Products

• 215022-89-2 28-iodo-3',5'-dioxo-4'-phenyl-3β-(tert-butyldimethylsilyloxy)-5α,8α<1',2'>-1',2',4'-triazolidino-6-ergostene 
• 215022-90-5 (22E)-28-iodo-3',5'-dioxo-4'-phenyl-3β-(tert-butyldimethylsilyloxy)-5α,8α<1',2'>-1',2',4'-triazolidino-6,22-ergostadiene 
• 215022-87-0 3',5'-dioxo-4'-phenyl-3β-(tert-butyldimethylsilyloxy)-5α,8α<1',2'>-1',2',4'-triazolidino-6-ergosten-28-ol 
• 215022-88-1 (22E)-3',5'-dioxo-4'-phenyl-3β-(tert-butyldimethylsilyloxy)-5α,8α<1',2'>-1',2',4'-triazolidino-6,22-ergostadien-28-ol 
• 23582-83-4 ergosta-5,7,24(28)-trien-3β-ol 
• 29560-24-5 ergosta-5,7,22,24(28)-tetraen-3β-ol 

Relevant academic research and scientific papers

A convenient method for retro-cycloaddition of adducts from steroidal 5,7-dienes and 4-phenyl-1,2,4-triazolidine-3,5-dione and application to the syntheses of biosynthetic intermediates of ergosterol

Use of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in boiling xylene was found to be a convenient method for the retro-cycloaddition of adducts of 4- phenyl-1,2,4-triazolidine-3,5-dione (PTAD) with steroidal 5,7-dienes. This process was applied to the synthe