Publications by authors named "Khalid A Shadid"

2 Publications

  • Page 1 of 1

Pharmacological activities of some new polycyclic triazolopyrazolopyridazine derivatives.

Int J Biol Macromol 2012 Jul-Aug;51(1-2):7-17. Epub 2012 May 8.

Pharmacy Department, College of Medical Rehabilitation Sciences, Taibah University, Madinah Munawara, Saudi Arabia.

In continuation of our previous work, a novel series of polycyclic derivatives were synthesized and their anti-inflammatory, analgesic and antimicrobial activities were evaluated. Initially the acute toxicity of the compounds was assayed via the determination of their LD(50). Some of the newly compounds exhibited better biological and pharmacological activities than the reference controls with low toxicity (LD(50)). The structure of the new compounds has been established on the bases of chemical and spectroscopic evidences. The detailed synthesis, spectroscopic data, LD(50) and pharmacological activities of the synthesized compounds were reported.
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October 2012

Cytotoxic caged-polyprenylated xanthonoids and a xanthone from Garcinia cantleyana.

Phytochemistry 2007 Oct 28;68(20):2537-44. Epub 2007 Jun 28.

Laboratory of Natural Products, Institute of Bioscience, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

Phytochemical studies on the leaves and trunk bark of Garcinia cantleyana yielded five caged-xanthonoids including one tetra- and four tri-prenylated xanthones, cantleyanone A (1), 7-hydroxyforbesione (2) and cantleyanones B-D (4-6), as well as a simple xanthone, 4-(1,1-dimethylprop-2-enyl)-1,3,5,8-tetrahydroxyxanthone (3). Eight other known compounds, deoxygaudichaudione A, gaudichaudione H, friedelin, garbogiol, macranthol, glutin-5-en-3beta-ol, and a mixture of sitosterol and stigmasterol were also isolated. Their structures were elucidated by means of spectroscopic data and comparison of their NMR data with literature values. Significant cytotoxicity against MDA-MB-231, CaOV-3, MCF-7 and HeLa cancer cell-lines was demonstrated by cantleyanones B-D, 7-hydroxyforbesione, deoxygaudichaudione A and macranthol, with IC(50) values ranging from 0.22 to 17.17 microg/ml.
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October 2007