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US 5,304,291 AGranted
Method of preparing 9beta, 10alpha-5,7-diene steroids
AssigneeDuphar International Research B.V.
InventorsBerthus Bout, Ronald Voorhaar
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Abstract
The invention relates to a method of preparing a 9beta,10alpha-5,7-diene steroid by irradiating the corresponding 9alpha,10beta-5,7-diene steroid with filtered ultraviolet light from an indium lamp.
Claims10
A method of preparing a 9.beta.,10.alpha.-5,7-diene steroid comprising irradiating the corresponding 9.alpha.,10.beta.-5,7-diene steroid or seco-steroid with filtered ultraviolet light, said irradiation being carried out with an indium lamp.
Dependencies are inferred from the claim text.