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US 5,670,643 AGranted
Method for preparing finasteride
AssigneeGlaxo Wellcome Inc.
InventorsRoman Davis, Alan Millar
Life of this patent
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Abstract
The present invention relates to a process for the preparation of finasteride, the compound of formula (I), comprising the reaction of the compound of formula (II) with t-butylamine. ##STR1##
Claims5
A process for preparing finasteride comprising reacting a compound of formula (II) with tertiary butylamine, wherein the acid chloride of Formula II is prepared by treating the parent acid with thionyl chloride ##STR6##
Dependencies are inferred from the claim text.