5696-23-1

Upstream product

• 968-49-0 19-oxoandrostenedione 
• 100-84-5 1-methoxy-3-methyl-benzene 
• 75863-24-0 (1Ξ,5SR)-1-Methyl-2-oxo-5-vinylcyclopentan-1,3-dicarbonsaeure-dimethylester 
• 80868-65-1 2-Trimethylsilyl-1-(4-methoxy-2-methylphenyl)prop-2-en-1-ol 
• 75863-10-4 <(6Ξ,7SR)-6-Methyl-1,4-dioxaspiro<4.4>non-7-yl>essigsaeure-methylester 
• 80868-64-0 1-(4-Methoxy-2-methylphenyl)prop-2-en-1-ol 
• 80868-66-2 1-(4-Methoxy-2-methylphenyl)prop-2-en-1-on 
• 75863-25-1 2-Trimethylsilyl-1-(4-methoxy-2-methylphenyl)prop-2-en-1-on 
• 57069-78-0 <(1SR,2Ξ)-2-Methyl-3-oxocyclopentyl>essigsaeure-methylester 
• 63518-90-1 (2Ξ,3SR)-2-Methyl-3-vinylcyclopentan-1-on 
• 27060-75-9 4-bromo-3-methylanisole 
• 52289-54-0 4-methoxysalicylaldehyde 
• 81740-49-0 1-((1R,3aR,3bS,4S,8aS,8bS,10aR)-4-Benzyloxy-6,10a-dimethyl-1,2,3,3a,3b,4,5,7,8,8a,8b,9,10,10a-tetradecahydro-dicyclopenta[a,f]naphthalen-1-yl)-ethanone 
• 81768-95-8 1-((1S,3aR,3bS,4S,8aS,8bS,10aR)-4-Benzyloxy-1-hydroperoxy-6,10a-dimethyl-1,2,3,3a,3b,4,5,7,8,8a,8b,9,10,10a-tetradecahydro-dicyclopenta[a,f]naphthalen-1-yl)-ethanone 

Downstream Products

• 53-16-7 Estrone 
• 2863-88-9 3-ethoxy-19-nor-3,5-androstadiene-17-one 

Relevant academic research and scientific papers

19-nor-4-androstene -3,17-dione method for the preparation of

The invention provides a method for preparing 19- nor-4-androstene-3, 17-diketone. The preparation method comprises the following step: with a compound I as a raw material, carrying out a Grignard reaction, an oxidation and ring-closure reaction and a reduction and ring-closure reaction, and the reaction route is shown as follows. The starting raw material of the preparation method is relatively cheap, the product yield is high and the production cost can be saved. The formula is described in the description.