A. khazaei

[ 1 ] - Synthesis and Characterization of γ-Alumina Porous Nanoparticles from Sodium Aluminate Liquor with Two Different Surfactants

Among the various phases of alumina, two phases γ and α are the most widely used in variousindustries. In this paper, γ-Al2O3 porous nanoparticles have been successfully synthesized from a s...

[ 2 ] - Melamine trisulfonic acid (MTSA) as an efficient catalyst for the synthesis of triazolo[1,2-a]indazole-triones and some 2H-indazolo[2,1-b]phthalazine-triones

Melamine trisulfonic acid (MTSA) as an efficient heterogeneous catalyst has been used for the one-pot preparation of triazolo[1,2-a]indazole-1,3,8-trione and 2H-indazolo[2,1-b]phthalazine-1,6,11-trione derivatives by the three-component condensation reaction of urazoles or phthalhydrazide, dimedone or 1,3-cyclohexanedione, and aldehydes under solvent-free conditions in good to excellent yields ...

[ 3 ] - Ultrasound assisted oxidation of various alcohols to corresponding aldehydes by using Al2O3 as catalyst

A convenient approach for oxidation of structurally diverse alcohols has been developed using KMnO4 as oxidant agent in the presence of a catalytic amount of Al2O3 in aqueous acetonitrile. In this method various alcohols generally afforded the corresponding carbonyl compounds directly in good to high yield under ultrasound irradiation conditions. It shows that this kind of catalysis system is v...

[ 4 ] - 1,3-Dichloro-5,5-dimethyl hydantoin and Poly N,N′-dibromo-N-ethyl naphthyl-2,7-disulfonamide as efficient catalysts for the methoxymethylation of alcohols under solvent-free conditions

Methoxymethylation of a variety of alcohols was performed using formaldehyde dimethyl acetal in the presence of 1,3-dichloro-5,5-dimethyl hydantoin [DCDMH] and Poly N,N′-dibromo-N-ethyl naphthyl-2,7-disulfonamide [PBNS] as catalysts at room temperature and under solvent-free conditions. Our experiments show that primary and secondary alcohols can be smoothly converted into the corresponding MOM...

[ 5 ] - سنتز و کاربرد تعدادی پلی پارا استایرن سولفونات مزدوج شده با دارو جهت آزاد سازی داروها

آزاد سازی کنترل شده دارو یکی از مهم ترین روشها برای افزایش اثرات درمانی و کاهش اثرات جانبی دارو هاست. در این تحقیق٬ 3 دارو (پی پیرازین 8- آمینو کینولین و N- فنیل پی پیرازین) بطور شیمیایی به پارا استایرن سولفونیل کلرید متصل شده و توسط AIBN در دمای 80 درجه سانتیگراد پلیمری گردیدند. نهایتا٬ توانایی آزاد سازی 3 پلیمر حاوی دارو در محلول بافر با pH برابر 3/1 در دمای 37 درجه سانتیگراد بررسی گردید. ط...

[ 6 ] - Catalytic application of 3-methyl-1-sulfonic acid imidazolium tetrachloroferrate as nanostructured catalyst on the cross-aldol condensation reaction of cycloalkanones with aldehydes

3-methyl-1-sulfonic acid imidazolium tetrachloroferrate {[Msim]FeCl4} as an efficient sulfur catalyst was prepared and applied, as an efficient catalyst, for the cross-aldol condensation reaction between cycloalkanones and arylaldehydes to give α,αʹ- bis(arylidene)cycloalkanones in high yields and short reaction times at 75 °C under solvent-free conditions. 3-methyl-1-sulfonic acid imidazolium...

[ 7 ] - A novel nano perfluoro ionic liquid as an efficient catalyst in the synthesis of chromenes under mild and solvent-free conditions

1-Methyl-1H-imidazol-3-ium 2,3,4,5,6-pentafluorophenolate [mim]C6F5O as a novel nano ionic liquid was designed, synthesized and characterized by using various techniques such as Fourier transform spectroscopy infrared (FT-IR), nuclear magnetic resonance (NMR), x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ener...

[ 8 ] - Melamine trisulfonic acid (MTSA) as an efficient catalyst for the synthesis of triazolo[1,2-a]indazole-triones and some 2H-indazolo[2,1-b]phthalazine-triones

Melamine trisulfonic acid (MTSA) as an efficient heterogeneous catalyst has been used for the one-pot preparation of triazolo[1,2-a]indazole-1,3,8-trione and 2H-indazolo[2,1-b]phthalazine-1,6,11-trione derivatives by the three-component condensation reaction of urazoles or phthalhydrazide, dimedone or 1,3-cyclohexanedione, and aldehydes under solvent-free conditions in good to excellent yields ...