Publications by authors named "M A El-Hashash"

A convenient and efficient synthetic protocol for the new selenadiazole. Thiadiazole and diazaphosphole derivatives incorporating a pyridazine moiety originating from 4-(4-aminophenyl)-4-oxobutanoic acid () were described. All newly synthesized compounds were evaluated for their antimicrobial activity using the disk diffusion method, and their cytotoxicity was evaluated against brine shrimp lethality bioassay.

View Article and Find Full Text PDF

A highly efficient and versatile synthetic approach for the synthesis of 4-(pyren-1-ylmethyl)-1-(d-glycosyloxy) phthalazine nucleosides ,, , -nucleosides , , , and acyclo nucleosides ,, , and - was described and fully characterized. Furthermore, a series of desired new nucleoside analogues containing Se of 4-(pyren-1-ylmethyl) phthalazine-1(2)-selenone - were synthesized. The structures of all reported compounds were confirmed by IR, H-NMR, C-NMR, MS and elemental analysis.

View Article and Find Full Text PDF

We report the synthesis of novel [4-(3-amino-4-mehoxy-5-methyl phenyl)-1-oxo-1H-phthalaz-2-yl] acetic acid hydrazide (APPH), followed by its characterization using X-ray diffraction (XRD), Fourier transforms infrared (FT-IR) spectroscopy, H-NMR spectroscopy, and LC/MS. Further, the inhibition effect of the varying concentration of APPH on the corrosion of low steel (LCS) in 0.5 M HSO was investigated by weight loss and electrochemical measurements at 30 °C.

View Article and Find Full Text PDF

This study aimed to assess the protective effect of encapsulating humic acid-iron complexed nanoparticles (HA-Fe NPs) inside glucanmannan lipid particles (GMLPs) extracted from yeast cell wall against aflatoxin B (AFB ) toxicity in vivo. Four groups of male Sprague-Dawley rats were treated orally for 2 weeks included the control group, AFB treated group (80 µg/kg b.w); GMLP/HA-Fe NPs treated group (0.

View Article and Find Full Text PDF

Pyrano[2,3-d]pyrimidine derivatives were synthesized by treating cyclic compounds containing active methylene group with aldehyde and malononitrile in butanol. The behavior of pyrano[2,3-d]pyrimidine towards some electrophlies namely triethylorthoformate followed by nitrogen nucleophiles as isobutylamine, urea, phenylthiourea, p-toluidine, o-phenylenediamine, o-aminophenol, 2-amino-4-methyl-pyridine and acetic acid with the aim of obtaining some interesting non-mixed heterocyclic compounds. All synthesized compounds to some extent have shown good antimicrobial activity against different microbial strains that had been extracted by inhibiting cell wall synthesis.

View Article and Find Full Text PDF