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Patent / Jan 01, 1976

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

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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

Preparation of a tetracycline topical formulations

Process for the preparation of disubstituted triiodoanilines by iodination of 3,5-disubstituted anilines

Manufacture of a triiodinated contrast agent via a new compound of (S)-5-(2-acetoxypropanamido)-2,4,6-triiodoisophthalic acid

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