Nanochemistry
Mohammad Ali Nasseri; Batol Zakerinasab; Sayyde Kamayestani
Volume 4, Issue 3, pp. 236-358, Serial No. 12 , July 2016, , Pages 283-294
Abstract
Mn(II) salen complex immobilized on nano silicagel was prepared by incorporating Mn(II) salen complex into a nanosilica matrix and characterized by TGA, XRD, atomic absorption spectroscopy and was successfully applied as catalyst for the oxidation of alcohols. Oxidation of a series of alcohols in acetonitrile ...
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Mn(II) salen complex immobilized on nano silicagel was prepared by incorporating Mn(II) salen complex into a nanosilica matrix and characterized by TGA, XRD, atomic absorption spectroscopy and was successfully applied as catalyst for the oxidation of alcohols. Oxidation of a series of alcohols in acetonitrile over immobilized Mn(II) salen complex using tetrabutylammonium peroxymonosulfate (TBAO) as oxidant were resulted to the corresponding carbonyl compounds selectively in moderate to high yields. It is noteworthy that the aldehydes do not undergo further oxdation to carboxylic acids. The yields of aromatic alcohols are higher than those of alcohols with aliphatic groups. The catalyst has been reused several times, without observable loss of its activity and selectivity.
Organic chemistry
Batol Zakerinasab; Mohammad Ali Nasseri; Hassan Hassani
Volume 4, Issue 2, pp. 133-235, Serial No. 11 , April 2016, , Pages 214-225
Abstract
Cellulose bonded N-propyl diethylene tetra sulfamic acid (CBPDETSA) was successfully applied as a green and recyclable acidic catalyst for the synthesis of tetrahydrobenzo [a] xanthene-11-one as an important class of potentially bioactive compounds. The products are obtained by the coupling of 2-naphtol ...
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Cellulose bonded N-propyl diethylene tetra sulfamic acid (CBPDETSA) was successfully applied as a green and recyclable acidic catalyst for the synthesis of tetrahydrobenzo [a] xanthene-11-one as an important class of potentially bioactive compounds. The products are obtained by the coupling of 2-naphtol , cyclohexadione and aldehyde derivatives in good to high yields (70- 92%) under solvent-free conditions. The reactivity of different aromatic aldehydes was influenced by the nature and position of the substituents on the aromatic ring. The benzaldehyde derivatives having an electron-withdrawing substituent were highly reactive and gave the products in excellent yields. Also, the catalyst could be recovered by filtration and subjected to a second reaction process. The results show that the yield of product after five runs was only slightly reduced.
Organic chemistry
Batol Zakerinasab; Mohammad Ali Nasseri; Fateme Kamali
Volume 3, Issue 4, pp. 283-387, Serial No. 9 , October 2015, , Pages 335-347
Abstract
Quinolines, an important class of potentially bioactive compounds, have been synthesized by treatment of O-aminoarylketones and carbonyl compounds utilizing niobium (V) chloride / polyethylenglycole(NbCl5.PEG) and niobium(V)chloride (NbCl5) as available and inexpensive catalysts. The quinoline derivatives ...
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Quinolines, an important class of potentially bioactive compounds, have been synthesized by treatment of O-aminoarylketones and carbonyl compounds utilizing niobium (V) chloride / polyethylenglycole(NbCl5.PEG) and niobium(V)chloride (NbCl5) as available and inexpensive catalysts. The quinoline derivatives were prepared in glycerol, an excellent solvent in terms of environmental impact, with high yields (76-98%) and short reaction times (15- 90 min). Not only diketones but also ketones afforded the desired products in good to excellent yields. The reaction time of 2-amino-5-chlorobenzophenone and dicarbonyl compounds was longer than those of 2-aminobenzophenone. The reaction of cyclic diketones took place faster than open chain analogues. These reactions also proceeded with acetophenone derivatives. In these cases the reaction times are longer.