Process for the production of 3-oxo-pregn-4-ene-21,...

Details Process for the production of 3-oxo-pregn-4-ene-21,... Process for the production of 3-oxo-pregn-4-ene-21,...

2005-07-21

2008-01-15

Seaman, D. Margaret (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07319154

ABSTRACT:
This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula IIas well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula IIIby the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula IIn addition, the invention relates to the dichloromethane hemisolvate of 6B,7B;15β,16β-diethylene-3-oxo-17α-pregnan-5β-ol-21,17-carbolactone (IV) as such.

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