Reductive Decyanation of Annulated Aminocyclopropane-endo-carbonitriles - a way to annulated cyclopropane-exo-amines
摘要:
Annulated Aminocyclopropane-endo-carbonitriles 11a,b are reductively decyanated by sodium in liquid ammonia with complete retention of configuration. An additionally existing chlorine atom in the starting materials 12a,c-e, thereby, is simultaneously replaced by hydrogen. The preparative advantage of this method is demonstrated by the selective access to 6 alpha-H-isomers 13b and 13e as members of the ensemble of bicyclo[3.1.0]hexanediyl-dimorpholine diastereomers. A strong buckled bicyclohexane unit is present in 3 alpha,6 alpha-isomer 13e as indicated by H-1 NMR spectroscopy and X-ray structural analysis.