Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07J
STEROIDS
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1/00
Normal steroids containing carbon, hydrogen, halogen or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane
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C07J1/0081
Substituted in position 17 alfa and 17 beta
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C07J1/0085
the substituent in position 17 alfa being a saturated hydrocarbon group
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C07J1/0085

Intermediates for the preparation of 11-methylene steroids
12227537 · 2025-02-18 · ·

Compounds having the formula ##STR00001##
or solvates of the compounds can be used as intermediates in the preparation of the synthetic steroids, Etonogestrel and Desogestrel, as well as other pharmaceutically active agents.