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Patent / Jan 01, 1976

16.beta.-Methyl-17-hydroxypregna-1,4,9(11)-triene-3,20-dione

Authors:

Source:

GB 1397267

The title compd. I was prepd. from pregnanetrione II. Thus, ketalization of II using HOCH2CH2OH followed by redn. using KBH4 and then dehydration gave pregnene III. The Grignard reaction of III and MeMgBr followed by acid hydrolysis and bromination-dehydrobromination gave I.

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Knowledge Center

16.beta.-Methyl-17-hydroxypregna-1,4,9(11)-triene-3,20-dione

Also in the Knowledge Center

Electrophilic reagents for monohalomethylation, their preparation and their uses

Continuous production of particles, micro- and/or nanoparticles, particulate amorphous solid dispersions, particulate co-crystals and pharmaceutical compns.

Dry-Powder Inhalation Formulation: Balancing Performance and Manufacturability

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