The synthesis has been effected of the new brassinosteroids (22S,23S)-28-homotyphasterol, 24-epityphasterol, and (22S,23S)-24-epityphasterol, which belong to the 3α-hydroxy-6-oxosteroids. For obtaining (22S,23S)-28-homotyphasterol from stigmasterol, a new scheme of synthesis has been developed the key stages of which are the reduction of a 2α,3α-epoxy-6-ketone with lithiumtetrahydroaluminate and the