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Vol. 2 Issue 3

Archives Journal Chemical Bulletin Vol. 2 Issue 3

COMPARISON OF SORPTION PROPERTIES OF NATIVE AND HEAT-TREATED PEANUT PEEL AGAINST NICKEL IONS

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 4-9 p.
Abstract
The paper presents the results of investigating the possibility of increasing the sorption capacity of peanut peel after heat treatment at 300°C for 30 minutes. World peanut production is about 40 million tons for 2017-2018. The peel remaining after peanut processing is not used and it is unused waste. For research peanuts were taken growing in the valley of Aleppo (Syria). It was established that after heat treatment, the peanut peel surface becomes more prominent, which improves its sorption properties. During the heat treatment, the charring of the plant fibers that make up the peel occurs, as a result of which the surface of the material is covered with a layer of soot and becomes black. The black color has the greatest intensity during heat treatment at 300 oC. At lower roasting temperatures, the carbonization of the fibers is insufficient.At higher temperatures, the carbon layer is burning with the formation of CO2.
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SYNTHESIS OF METAL-CONTAINING IONIC LIQUIDS FOR CLEANING PETROLEUM PRODUCTS

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 10-18 p.
Abstract
Imidazolium zinc-containing ionic liquids (IL), [1-R-3-R'-imidazolium] alkyl sulfate-ZnCl2 (R and R '= H or alkyl), were very effective for removing nitrogen from a model fuel containing quinoline, indole, or acridine in n-heptane. The interaction of EtSO 4 and ZnCl 2 (EtSO 4) with a heterocyclic N compound was studied theoretically. Zn-containing IL, [EMIm] ZnCl 2 (EtSO 4) used to recover quinoline were successfully regenerated using diethyl ether as the back extractant.
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ORIGINAL CATALYTIC SYNTHESIS OF MACRODIOLIDES CONTAINING 1Z, 5Z-DIENE FRAGMENT AND THE STUDY OF ITS ANTITUMOR ACTIVITY IN VITRO

 19-25 p.
Abstract
An original strategy was developed for the synthesis of valuable unsaturated macrocyclic lactones, macrodiolides, containing a 1Z,5Z-diene moiety in 57-79% yields and >98% stereoselectivity by hafnium triflate Hf(OTf)4-catalyzed intermolecular esterification of aliphatic α,ω-dicarboxylic acids with α,ω-alka-nZ,(n+4)Z-dienediols (1,12-dodeca-4Z,8Z-dienediol, 1,14-tetradeca-5Z,9Z-dienediol, 1,18-octadeca-7Z,11Z-dienediol). The diols were obtained by homo-cyclomagnesiation of tetrahydropyran ethers of oxygenated 1,2-dienes with EtMgBr in the presence of Mg metal and Cp2TiCl2 catalyst (10 mol. %). The resulting macrodiolides exhibit high cytotoxic activity in vitro against Jurkat, K562, U937, Hek293 and HeLa tumor cell lines.
The problem of stereoselective methods for the synthesis of macrocyclic compounds containing 1Z, 5Z-diene grouping in their structure was analyzed, using 1,2-dienes (Cemilev reaction) using alkyl halide derivatives of Mg (RMgX) by Ti- action at a key stage of the synthesis, containing complex catalysts. The resulting macro-carbocycles are of interest as new synthetic biologically active precursors for the creation of modern drugs for the treatment of cancer.
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