Synthese und Konfiguration einiger Spiro [indan‐2,2′‐pyrrolidin]‐ und Spiro [pyrrolidin‐2,2′‐tetralin]‐Derivate ,

Synthesis and configuration of some spiro [indan‐2,2′‐pyrrolidine] and spiro [pyrrolidine‐2,2′‐tetraline] derivatives Catalytic hydrogenation of the nitrosoindan and nitrosotetralin derivatives 8 yielded trans ‐1‐hydroxy‐spiro [indan‐2,2′‐pyrrolidin]‐5′‐one ( 9 ) and trans ‐1′‐hydroxy‐spiro [pyrrolidine‐2,2′‐tetralin]‐5‐one ( 10 ) respectively, whilst the corresponding cis compounds 12 and 15 were prepared via the chlorides 11 and 14 . The configurations of 10 and 13 were determined by X‐Ray analysis.