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۱Synthesis and Cytotoxic Activity of Novel 9–[Hydroxy(Substitutedphenyl) Methyl]–2,2–Dimethyl–2,3,8,9–Tetrahydro–4H,10H–Pyrano[2,3–f ]Chromene–4,10–Diones
اطلاعات انتشار: Iranian Journal of Chemistry and Chemical Engineering (IJCCE)، بيست و نهم،شماره۴(پياپي ۵۶)، ۲۰۱۰، سال
تعداد صفحات: ۸
Chromanone derivatives demonstrate remarkable cytotoxity against a varieties of cancer cell lines. Novel 9–[hydroxy(substitutedphenyl)methyl]–2,2–dimethyl–2,3,8,9– tetrahydro–4H,10H–pyrano[2,3–f]chromene–4,10–diones as Glyasperin analogues were synthesized in four steps from known 4–chromone 1. The key step was the preparation of chromane dione 5a by regioselective intramolecular cyclization reaction in 85% yield. Condensation of 5a with substituted aromatic aldehydes afforded corresponding alpha hydroxybenzyl analogues 6a–6e. The cytotoxic study of the synthesized compounds against breast cancer human cell line (T47D) showed moderate cytotoxic activities (IC50=16–40 μM) compared to the positive control drug vincristin (IC50=2.5 μM).

۲Kinetic Study of Ethyl Mercaptan Oxidation in Presence of Merox Catalyst
نویسنده(ها): ، ، ، ، ، ، ،
اطلاعات انتشار: Iranian Journal of Chemistry and Chemical Engineering (IJCCE)، سي و دوم،شماره۲(پياپي ۶۶)، ۲۰۱۳، سال
تعداد صفحات: ۱۰
Mercaptans are commonly present in petroleum products. Their foul odor and highly corrosive nature make them the most undesirable sulfur compounds so they should be removed because of environmental issues. Merox process is used for oxidation of mercaptans to disulfide using air in the presence of alkaline solution and Merox catalyst. In this paper، due to lack of information about the kinetic of mercaptan oxidation، the kinetic of conversion of ethyl mercaptan in gasoline and kerosene is studied in order to be able to model and simulate this process. The experiments were carried out in a semi–batch bubble column reactor and it was proved that increasing the temperature، improves the rate of the reaction. The obtained results were analyzed and a correlation for the rate of reaction is suggested. The suggested equation is first–order with respect to mercaptan concentration.
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