Functionalized chloroenamines in aminocyclopropane synthesis III. synthesis and assignment of configuration of two isomeric morpholinobicyclo[3.1.0]hexane derivatives
generating tricyclic derivatives 14, 16 and 17. LiAlH4 reduction of 11 afforded aminoalcohol 12. The corresponding exo-morpholino isomer 20 could be obtained by LiAlH4 reduction of exo-morpholino compound 19 which was accessible from N-tosylcarbamoylated chloroenamine 10 and cyanide. ΔGX values of 75.4–77.6 kJ/mol and 52.1 kJ/mol were determined for the morpholine dynamics in the two isomeric compounds 12