The synthesis of a new family of 1,3-di(1,3,4-oxadiazol-2-yl)benzene derivatives is reported. Their structures were characterized using standard spectroscopic techniques such FT-IR, ¹H-NMR, ¹³C-NMR spectroscopies and mass spectrometry. The antidiabetic potential of these synthetic molecules was evaluated by determining their in vitro inhibitory activity against pancreaticα-amylase enzymes. In addition, in silico molecular docking and pharmacokinetic simulations were performed to examine the compounds binding interactions with the enzyme active site and to assess their ADMET properties. Compared the used positive control, the obtained results show that all 1,3-di(1,3,4-oxadiazol-2-yl)benzene derivatives demonstrated a good potency to inhibit the α-amylase enzyme, Especially, the 2,2'-(1,3-phenylebis(1,3,4-oxadiazole-5,2-diyl))dianiline (5d) with IC50 of 0.393 mg/mL. Furthermore, the experimental findings were supported by molecular dynamics, docking and ADMET studies. The obtained data emphasizes compound 5d as potential as safe and effective therapeutic agents targeting the pancreatic α-amylase enzyme.

In the present work, an enaminedione 2 was easily obtained in excellent yield (92 %) by the N-N exchange reaction of DAMFA (diethylaminomethylenehexafluoroacetylacetone) 1 with ethyl glycinate hydrochloride using the Michael 1,4-addition/elimination approach. The obtained compound 2 was used as a precursor in the development of a new synthesis of 3-trifluoromethyl pyrrole 3 and 4-trifluoromethyl-(1H)-2-pyridinone 4. A mechanism involving nucleophilic substitution and intramolecular cyclization is proposed. The obtained compounds were identified and confirmed by Fourier transform infrared spectroscopy, proton and carbon nuclear magnetic resonance spectroscopy, and high-resolution mass spectrometry. The results of the analyses are in good agreement with the proposed structures of the synthesized compounds.

A series of new benzimidazole phosphonate derivatives was obtained via nucleophilic addition of triethyl phosphite to the imine of the imidazole subgroup under solvent-free conditions. Structures of the formed products were confirmed using spectroscopic data (ATR-FTIR, ¹H-NMR, ¹³C-NMR, and MS). The antimicrobial profiles of the synthesized compounds were examined, and promising activities against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans were revealed, showing significant inhibition zone diameters ranging from 13 to 17 mm. Alongside these experimental findings, in silico investigations were conducted using ADMET characteristics, which showed a positive pharmacokinetic profile and provided valuable information on potential interactions with target molecules. Besides, docking studies against tested microorganisms revealed further insights on the compounds’ binding interactions with the active sites. Finally, DFT analysis was performed to shed light on the synthesis of novel molecules.

This review presents 1,3,4-oxadiazole which has considerable importance in the fields of pharmacy, medicine, corrosion and coordinate chemistry. 1,3,4-oxadiazole plays a vital role and is a simple substance for many pharmacokinetic compounds such as antifungal drugs, antibacterial drugs, most cancer tumors and anti-inflammatory drugs. This study describes many methods for the synthesis of 1,3,4-oxadiazole.