344286-11-9

Upstream product

• 4124-41-8 p-toluenesulfonylanhydride 
• 22049-48-5 17β-Hydroxy-3-oxo-5α-methyl-A,19-bisnor-androstan 
• 3941-50-2 (4R,5R,8R,9S,10R,13S,14S,17S)-17-Hydroxy-13-methyl-tetradecahydro-20-oxa-cyclopropa[4,5]cyclopenta[a]phenanthren-3-one 
• 24506-85-2 (1aS,3aR,3bS,5aS,6S,8aS,8bR,10aR)-1a,5a-Dimethyl-tetradecahydro-1-oxa-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-ol 
• 344286-09-5 (1S,3aR,3bS,5aS,6S,8aS,8bR,10aR)-6-(tert-Butyl-dimethyl-silanyloxy)-1,5a-dimethyl-tetradecahydro-dicyclopenta[a,f]naphthalene-1,10a-diol 
• 344286-07-3 (1S,3aS,3bR,5aR,8aR,8bS,10aS)-1-(tert-Butyl-dimethyl-silanyloxy)-10a-methyl-6-methylene-tetradecahydro-dicyclopenta[a,f]naphthalen-5a-ol 
• 344286-15-3 (3S,3aS,5aS,6R,9aR,9bS)-3-(tert-Butyl-dimethyl-silanyloxy)-6-but-3-ynyl-3a-methyl-dodecahydro-cyclopenta[a]naphthalen-7-one 
• 344286-10-8 Trifluoro-acetic acid (1S,3aS,3bR,8aR,8bS,10aS)-6,10a-dimethyl-1,2,3,3a,3b,4,5,7,8,8a,8b,9,10,10a-tetradecahydro-dicyclopenta[a,f]naphthalen-1-yl ester 
• 17541-45-6 5-Oxo-17β-hydroxy-4,5-seco-oestrin-(3) 
• 22957-46-6 3α-Methyl-A,19-dinor-5β-androstan-3β,5,17β-triol 
• 22957-36-4 3-Methyl-A,19-dinor-Δ³-androsten-17β-ol 
• 434-22-0 19-nortestosterone 

Downstream Products

• 344286-12-0 Toluene-4-sulfonic acid (1S,3aS,3bR,5aR,6R,8aR,8bS,10aS)-6-hydroxy-5a,10a-dimethyl-hexadecahydro-dicyclopenta[a,f]naphthalen-1-yl ester 

Relevant academic research and scientific papers

Synthesis of ent-19-nortestosterone from its naturally occurring antipode

The synthesis of ent-19-nortestosterone from natural 19-nortestosterone is described. The synthetic sequence takes advantage of the 'near symmetry' properties of the steroid; removal/introduction of a methyl group and conversion of the A- into the D-ring and vice versa eventually results in overall inversion of the stereochemistry.