Chemistry Articles

Artemisinin, a sesquiterpene lactone, is the active antimalarial constituent of Artemisia annua. Several fungal strains Saccharomyces cerevisiae, Aspergillus flavus, Aspergillus niger and Picchia pastoris were used to biotransform artemisinin. Among these strains, A.

Plantago major has been used in traditional medicine for the treatment of various diseases. In order to evaluate the quality of P. major, a simple, rapid and accurate high-performance liquid chromatography (HPLC) method was developed for the assessment of the two bioactive triterpenic acids: oleanolic acid (OA) and ursolic acid (UA).

During the synthesis of Sparfloxacin, a fluoroquinolone antibiotic drug, an unknown impurity (SF5-IMP) was identified in the fifth stage of the synthetic process. The impurity has been isolated from the mother liquor of intermediate SF5.

A sensitive and stereoselective HPLC method has been developed for the simultaneous determination of pindolol enantiomers in plasma and pharmaceutical products.

In the current study a quantitative structure activity relationship approach using sequential multiple linear regression analysis was applied to a series of 2-alkyl-4-(biphenylylmethoxy)quinolines as angiotensin II (Ang II) receptor antagonists by using Chem 3D and Dragon Software.

A series of novel substituted acridones (1–15) have been synthesized. Their in vitro cytotoxicity against human breast adenocarcinoma (MCF-7) and human promyelocytic leukemia (HL-60) cell lines has been investigated. The compounds 11, 12, 14 and 15 showed moderate activity against MCF-7 cell lines with IC50 value < 5.83 μM.

Three dehydrogenases – (R)-alcohol dehydrogenase from L. kefir, (S)-aromatic alcohol dehydrogenase from T. sp. and (S)-alcohol dehydrogenase from T. brockii – were tested for the preparation of enantiopure hydroxyl metabolites of pentoxifylline (PTX), propentofylline (PPT) and denbufylline (DBF). These metabolites have an important pharmacological significance.

The marine benzo[c][2,7]naphthyridine alkaloid subarine is prepared in 4 steps, starting from commercially available 1,10-phenanthroline, via oxidative cleavage to the bipyridine-dicarboxylate, conversion to the mono(2-iodoanilide), and radical cyclization. The alkaloid does not show any significant antimicrobial or cytotoxic activity.
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