3β-Acetoxy-6-nitrocholest-5-ene: Crystal structure, thermal, optical and dielectrical behavior

Synthesis, Antibacterial Activity and Molecular Docking of Phospholidinones in Stigmastane Series

INTRODUCTION

Steroid compounds are widely distributed in nature throughout scientific history. Living organisms such as animals and vegetables have steroids that show a significant effect on their vital activities. Sterols are key components of all eukaryotic cell membranes.

METHODS

Steroidal compounds; 3β-oxo-[1',3',2'-oxathiaphos-phalidine-2'-one] stigmast-5-ene and 3β- oxo[1`,3`,2`-dioxaphosphalidine-2`-one]-stigmast-5-ene were successfully prepared using easily accessible 3β-hydroxy stigmast-5-ene with phosphorous oxychloride (POCl3), 2- mercaptoethanol/ethylene glycol and triethylamine (Et3N) in dry diethyl ether. Products were obtained in semi-solid state and characterized using physicochemical techniques.

RESULTS

The results of the bioassay showed that the synthesized compound containing the sulfur atom had antibacterial activity. Molecular docking was also done in order to show in silico antibacterial activity and to make out the probable binding mode of compound with the amino acid residues of protein.

CONCLUSION

The results of the docking study showed that synthesized compound 2 had minimal binding energy with substantial affinity for the active site.

Oxidation of cholesterol and O-protected derivatives by the environmental pollutant NO2˙

Exposure of O-protected and free cholesterol to NO₂˙ leads to oxidation of the alkene moiety through non-radical pathways, demonstrating that ionic processes must be considered when assessing NO₂˙ toxicity.