Synthesis, spectral characterization, single crystal and conformational study of 1,5-dimethyl-2,4-diphenyl-3-azabicyclo[3.3.1]nonan-9-one derivatives

► Bicyclic compounds are important synthetic intermediates for organic synthesis. ► X-ray crystallographic reveals compound 1 exist in boat-chair conformation. ► Compound 1 is stabilized by intermolecular NH···O hydrogen bond.