218937-39-4

Upstream product

• 108-24-7 acetic anhydride 
• 218937-36-1 (20R)-5,6β-dihydroxy-5α-pregnane-3β,20-diyl 3,20-dibenzoate 

Downstream Products

• 218937-41-8 (20R)-6-β-hydroxy-5-methyl-19-nor-5β-pregn-9-ene-3β,20-diyl 3,20-dibenzoate 
• 130917-92-9 5β-methyl-19-norpregn-9-ene-3,20-dione 
• 218937-40-7 (20R)-5-methyl-19-nor-6-oxo-5β-pregn-9-ene-3β,20-diyl 3,20-dibenzoate 

Relevant academic research and scientific papers

Hydrogenation of a tetrasubstituted double bond: Synthesis of 5-methyl-19-nor-5β-pregnanes

Reduction of C=C and/or C=O bonds in 5-methyl-19-nor-5β-pregn-9-ene-3,20-dione (1) leads to saturated and unsaturated ketones and hydroxy ketones. The C=C reduction affords mainly 9β,10β and 9α,10β dihydro products. Reaction conditions of partial esterifi