Improvements in or relating to the reduction of 9(11)-dehydro-12-keto spirostanes
The invention comprises a process for the reduction of a 9(11) dehydro-12-keto-spirostane to the corresponding 12-desoxyspirostane by formation of the 12-dithioketal followed by reduction by means of an alkali metal or alkaline earth metal in liquid ammonia, a primary amine containing 1 to 5 carbon...
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