iron overload is a clinical problem which can be prevented by using iron chelating agents. an alternative method of relieving iron overload is to reduce iron absorption from the intestine by administering specific iron chelating agents, which can bind iron to form nonabsorbable complexes. based on this strategy, a series of polymeric ligands containing the chelating moiety 3-hydroxypyridin-4-on...

AIM Sixteen 3-benzylidenechromanones were subjected to quantitative structure-activity relationship (QSAR) analysis based on their cytotoxicity and tumor-specificity, in order to examine their new biological activities. MATERIALS AND METHODS Cytotoxicity against two human oral squamous cell carcinoma cell lines, two mesenchymal and two epithelial normal oral cells, was determined by the 3-(4,...

A new benzo[c]phenanthridine, oxynorchelerythrine (1), and two new benzenoid derivatives, methyl 4-(2-hydroxy-4-methoxy-3-methyl-4-oxobutoxy)benzoate (2) and (E)-methyl 4-(4-((Z)-3-methoxy-3-oxoprop-1-enyl)phenoxy)-2-methylbut-2-enoate (3), have been isolated from the twigs of Zanthoxylum ailanthoides, together with 11 known compounds (4-14). The structures of these new compounds were determine...

Benzoquinones (BQ) have important functions in many biological processes. In alkaline environments, BQs can be hydroxylated at quinoid ring proton positions. Very little is known about the chemical reaction leading to these structural transformations as well as about the properties of the obtained hydroxyl benzoquinones. We analyzed the behavior of the naturally occurring 2,6-dimethoxy-1,4-benz...

BicycloACHTUNGTRENNUNG[1.1.1]pentane and its derivatives are not only of theoretical interest, but have attracted particular attention of organic and physical-organic chemists as peculiar fragments in oligomers, liquid crystalline compounds, supramolecular aggregates and monolayers, as well as compounds for drug design, etc. 1,3-Disubstituted derivatives—bicycloACHTUNGTRENNUNG[1.1.1]pentanes wi...

Eugenol is the active molecule naturally found in clove oil. The calculations have been done for eugenol and its derivatives computationally. This computational calculation aims to obtain a stable structure electronic properties of eugenol, methyl acetyl eugenol. used DFT geometry optimization gas phase using B3LYP functional 6-31G(d) as basis set. optimized not planar. presence methoxy replaci...

Polyols can be synthesized from carbohydrates in bioor chemo-catalytic way. The conversion of polyols with two hydroxyl groups in 1,4-positions, for example 1,4-butanediol, results in furan derivatives. In contrast, during the dehydration of diols with two vicinal hydroxyl groups, for example, 1,2-propaneand 1,2-butanediol, aldehydes or ketones are formed [1] . This will be presented exemplaril...

In order to seek a urease inhibitor more potent than hydroxyurea (1), its alkyl- or phenyl-substituted derivatives were synthesized and evaluated for their effect on the jack bean urease. Of 16 compounds tested, m-methyl- (10) and m-methoxy-phenyl substituted hydroxyurea (13) showed the most potent inhibitory activities against the enzyme.

This experimental and computational study on the energetic properties of 2-methyl-, 3-methyl-, 4-methoxy- 5-methoxy-indanones has been carried out using mostly calorimetric techniques a suitable approach. The combustion sublimation/vaporization enthalpies were determined via calorimetry Calvet microcalorimetry, respectively, allowing for calculation standard molar formation in gaseous phase. en...

A new class of methoxy-poly(ethylene glycol) (mPEG) derivatives having a cleavable group of oligo-lactic acid (OLA) was synthesized by ring opening polymerization of L-lactide using a terminal hydroxyl end of mPEG as an initiator. The synthesized mPEG derivatives had 0.8 and 3.6 lactic acid units based on the MALDI-TOF data. A terminal end group of mPEG-OLA was further activated with p-nitrophe...