17β-ethynylsteroids and process for preparing same
This is disclosed novel intermediates, i.e. 17β-ethynylsteroids, which are useful for the preparation of corticoids such as hydrocortisone and prednisolone, and a process for preparing the same.
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(2008/06/13)
Process for the preparation of 17β-hydroxy-3-oxo-17α-pregn-4-ene-21-carboxylic acid γ-lactone
A new process for the preparation of 17β-hydroxy-3-oxo-17α-pregn-4-ene-21-carboxylic acid γ-lactone is described herein. The process makes use of androst-4-ene-3,17-dione as the starting material and 17α-ethynyl-17β-hydroxyandrost-4-en-3-one as an early intermediate.
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(2008/06/13)
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