Kurzmitteilung / Short Communication. Acid‐Catalyzed and Lewis Acid‐Promoted Synthesis of 6‐Hydroxybicyclo[4.3.0]nonan‐3‐ones

Abstract

3a‐Hydroxy‐6‐hydrindanones of type 10 and 11 can be obtained by acid‐catalyzed or Lewis acid‐promoted cyclization reactions of ene‐ketals of type 6 and 7 . The compounds described are interesting building blocks for biologically active heart glycosides.