Synthesis, spectroscopic characterization, crystal structures, theoretical studies, and antibacterial evaluation of two novel N-phosphinyl ureas
作者:Khodayar Gholivand、Nilufar Dorosti
DOI:10.1007/s00706-010-0436-8
日期:2011.2
Two novel N-phosphinyl ureas containing different substituents were synthesized and characterized by H-1, C-13, and P-31 NMR, IR, UV, mass spectroscopy, and elemental analysis. The crystal structures of these compounds were determined by X-ray crystallography. The structure of one compound exhibits the presence of two independent forms of the molecule with equal occupancy in the lattice and theoretical data reveal the same stabilization energies for these conformers. The title molecules have anti conformation with respect to the C=O and P=O bonds, whereas the other compound shows syn configuration. Quantum chemical calculations were applied to clarify this conformational behavior. Furthermore, the molecular geometry and vibrational frequencies of the new derivatives in the ground state were calculated by using the Hartree-Fock (HF) and density functional method (B3LYP) with 6-31+G** and 6-311+G** basis sets and compared with experimental values. The new derivatives were additionally tested in view of their antibacterial properties.
Synthesis, crystal structure, biological evaluation, electronic aspects of hydrogen bonds, and QSAR studies of some new N-(substituted phenylurea) diazaphosphore derivatives as anticancer agents
A new series of 2-[N-(R-phenylureido)]-1,3,2-diazaphosphore-2-oxide derivatives (R = CH3, F, NO2, CN) were synthesized and characterized by 31P, 1H, 13CNMR and FT-IR spectral techniques. All the compounds were evaluated for their antibacterial activity against some Gram-positive, Gram-negative strains of bacteria, as well as for their cytotoxic effects on MCF-7, MDA-MB-231, PC-3, HeLa, and K562 human