This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula II ##STR00001## as well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula III ##STR00002## by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula I ##STR00003## In addition, the invention relates to the dichloromethane hemisolvate of 6B,7B;15.beta.,16.beta.-diethylene-3-oxo-17.alpha.-pregnan-5.beta.-ol-21,- 17-carbolactone (IV) as such.

 
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