Pentamidine Analogs: Syntheses, Structures in Solid State by 13C CP/MAS NMR Spectroscopy, and X-Ray Crystallography and their Preliminary Biological Screening Against Human Cancer

The synthesis of four new 1,5-bis(4-amidinophenoxy)-3-oxapentane analogs is described. The structures of the obtained bis-amidines and bis-nitriles in the solid state are evaluated on the basis of 13C CP/MAS NMR spectra and theoretical calculations at DFT level. A single crystal X-ray diffraction structure is presented for 1,5-bis(4-amidinophenoxy)-3-oxapentane. A preliminary anticancer assay against three cell lines is also given.