Masoud Mokhtary
Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran.
[ 1 ] - Polyvinylpolypyrrolidone supported antimony(III) chloride (PVPP-SbCl3): An efficient catalyst for the synthesis of chromenylphenylpropanones
An efficient synthesis of chromenylphenylpropanone derivatives as warfarine-like analogues was developed by the Michael addition of 4-hydroxycoumarin to α,β-unsaturated compounds in the presence of polyvinylpolypyrrolidone supported antimony(III) chloride (PVPP-SbCl3) as a new polymeric Lewis acid catalyst in chloroform at reflux conditions without formation of 2,4-...
[ 2 ] - Polyvinylpolypyrrolidone supported chlorosulfonic acid: An efficient catalyst for the one-pot synthesis of hexahydroquinolines
ABSTRACT Polyvinylpolypyrrolidone supported chlorosulfonic acid ([PVPP-SO3H]+Cl-) was synthesized and evaluated as a recoverable catalyst for the one-pot synthesis of hexahydroquinolines by reaction of arylaldehydes, dimedone (5,5-dimethylcyclohexane-1,3-dione) or 1,3-cyclohexanedione, ethylacetoacetate and ammonium acetate in high to excellent yield in ethanol at 70 °C. The [PVPP-SO3H]+Cl- cat...
[ 3 ] - L-Proline catalyzed synthesis of Betti bases and biscoumarin derivatives
The direct three component modified Mannich reaction via condensation of aldehydes, 2-naphthol or 2,7-naphthalendiol and piperidine to generate Betti bases has been carried out over L-proline (20 mol%) with high efficiency under solvent free conditions at 70 OC. Also, the reaction of aromatic aldehyde and 4-hydroxycoumarin in the presence of L-proline (20 mol%) in the ethanol under reflux condi...
[ 4 ] - PolyVinylPolyPyrrolidone-Supported Boron Trifluoride (PVPP-BF3); Highly Efficient Catalyst for Oxidation of Aldehydes to Carboxylic Acids and Esters by H2O2
A highly efficient method for the oxidation of aldehydes to carboxylic acids using PolyVinylPolyPyrrolidone supported - Boron Trifluoride (PVPP-BF3) in the presence of 35% hydrogen peroxide has been developed in acetonitrile at 60 °C. This procedure cleanly oxidizes variety of aldehydes to the corresponding carboxylic acids. Oxidative esterification of benzaldeh...
[ 5 ] - Application of Nicotinic Acid Functionalized Chlorosulfonic Acid as a Green Catalyst for the Synthesis of Bis(2-methyl-1Hindole)Derivatives
3-Carboxy-1-sulfopyridin-1-ium chloride ([CPySO3H]+Cl-) as a novel ionic organocatalyst for thecondensation of aldehydes and 2-methylindole to synthesize bis(2-methyl-1H-indole) derivatives inacetonitrile at room temperature has been developed. Some tetrakis (2-methyl-1H-indole)derivatives have also been synthesized by the reaction of 2,2'-(butane-1,4-diylbis(oxy))dibenzaldehyde and 2-methylind...
[ 6 ] - Efficient one-pot synthesis of 6-amino-4-aryl-5-cyano-2-methyl-4H-pyran-3-carboxylates catalyzed by nano MgO in water
Water is a versatile solvent in many ways, and in this sense performing organic reactions in this medium is now of great interest. The one-pot reaction of ethyl acetoacetate or benzyl acetoacetate, with benzaldehydes and malononitrile to provide some novel 6-amino-4-aryl-5-cyano-2-methyl-4H-pyran-3-carboxylates has been performed over nano MgO with high performance in water as a green solvent a...
[ 7 ] - Boron trifluoride etherate; highly efficient catalyst for synthesis of tert-butylamides via modified Ritter reaction in solvent free condition
Highly efficient method for the preparation of N-tert-butyl amides by reaction of nitriles with tertbutylacetateis described using boron trifluoride etherate in solvent free condition. Selective amidation ofbenzonitrile in the presence of acetonitrile was also achieved.
[ 8 ] - تهیه و بررسی ویژگی های نانوکامپوزیت پلی وینیل پیرولیدون ـ نانولوله کربن چند دیواره دارای گروه کربوکسیل
نانوکامپوزیت پلی وینیل پیرولیدون (PVP)/ نانولوله کربن دارای گروه عاملی کربوکسیل (MWCNT-COOH)، در محیط آبی تهیه شد. ساختار، ریخت شناسی، ویژگیهای گرمایی نانوکامپوزیت PVP/MWCNT-COOH به وسیله فناوریهایFT-IR، SEM، TGA و DSC بررسی شد. براساس آنالیز DSC<...
[ 9 ] - Application of 2-methylpyridinum p-toluenesulfonate ([2-MPy][p-TSA]) as an efficient catalyst for the one-pot synthesis of hexahydroquinolines-3-carboxamides
2-Methylpyridinum p-toluenesulfonate ([2-MPy][p-TSA]) as a novel room temperature ionic liquidwas synthesized and evaluated as a recoverable catalyst for the one-pot synthesis ofhexahydroquinoline-3-carboxamide derivatives by four-component reaction of arylaldehydes,dimedone, acetoacetanilide and ammonium acetate in high to excellent yield in ethanol at 50 oC.The [2-MPy]...
[ 10 ] - Green approach for the synthesis of pyranopyrazoles and hexahydroquinoline-3-carboxamides using unripe grape juice (verjuice) as catalyst
Unripe grape juice (verjuice) as a natural catalyst was successfully applied to perform the one-pot reaction of aryl aldehydes, malononitrile, hydrazine hydrate and ethyl acetoacetate to synthesize pyranopyrazole derivatives in aqueous ethanol at room temperature in excellent yields. Furthermore, unripe grape juice catalyzed one-pot synthesis of hexahydroquinoline-3-carboxamide derivatives by t...
[ 11 ] - Polyvinylpolypyrrolidone supported antimony(III) chloride (PVPP-SbCl3): An efficient catalyst for the synthesis of chromenylphenylpropanones
An efficient synthesis of chromenylphenylpropanone derivatives as warfarine-like analogues was developed by the Michael addition of 4-hydroxycoumarin to α,β-unsaturated compounds in the presence of polyvinylpolypyrrolidone supported antimony(III) chloride (PVPP-SbCl3) as a new polymeric Lewis acid catalyst in chloroform at reflux conditions without formation of 2,4-...
[ 12 ] - Polyvinylpolypyrrolidone supported chlorosulfonic acid: An efficient catalyst for the one-pot synthesis of hexahydroquinolines
ABSTRACT Polyvinylpolypyrrolidone supported chlorosulfonic acid ([PVPP-SO3H]+Cl-) was synthesized and evaluated as a recoverable catalyst for the one-pot synthesis of hexahydroquinolines by reaction of arylaldehydes, dimedone (5,5-dimethylcyclohexane-1,3-dione) or 1,3-cyclohexanedione, ethylacetoacetate and ammonium acetate in high to excellent yield in ethanol at 70 °C. The [PVPP-SO3H]+Cl- cat...
[ 13 ] - L-Proline catalyzed synthesis of Betti bases and biscoumarin derivatives
The direct three component modified Mannich reaction via condensation of aldehydes, 2-naphthol or 2,7-naphthalendiol and piperidine to generate Betti bases has been carried out over L-proline (20 mol%) with high efficiency under solvent free conditions at 70 OC. Also, the reaction of aromatic aldehyde and 4-hydroxycoumarin in the presence of L-proline (20 mol%) in the ethanol under reflux condi...
[ 14 ] - Deep Eutectic Solvent Based on Choline Chloride/Urea as an Efficient Catalytic System for the One-Pot Synthesis of Highly Functionalized 1,4-Dihydropyridines and Polysubstituted 4H-Chromenes
One-pot four-component synthesis of polyfunctionalized 1,4-dihydropyridine derivatives was developed by a condensation of aldehydes, malononitrile, diethylacetylenedicarboxylate and aniline in the presence of choline chloride/urea as a deep eutectic solvent (DES)at room temperature.Moreover, an efficient method was reported for the synthesis of highly substituted 4H-chromenes through one-...
[ 15 ] - Application of PVPP-OXA as an efficient catalyst for the synthesis of mono and bulky 1,8-dioxooctahydroxanthenes
An efficient method for the synthesis of mono and bulky 1,8-dioxooctahydroxanthenes was developed by the reaction of dimedone or 1,3-cyclohexadione and aldehydes or some bisaldehydes in the presence of polyvinylpolypyrrolidone supported oxalic acid (PVPP-OXA) as a new polymeric catalyst in ethanol at room temperature. Polyvinylpolypyrrolidone supported oxalic acid was characterized by FT-IR, an...
[ 16 ] - سنتز تک ظرفی تتراهیدروکرومنوکرومن دی اون ها با استفاده از 3-کربوکسی -1-سولفوپیریدینیوم کلرید به عنوان کاتالیست
توسعه روش های نوین برای سنتز کارآمد ترکیب های هتروسیکلی یک موضوع با اهمیت در شیمی سنتز ترکیب های آلی است. مشتق های کرومن به عنوان یک جزءهای ساختاری چشمگیر در ترکیب های زیستی فعال و طبیعی نقش مهمی در سنتز ترکیب های دارویی دارند. در این پژوهش، اثر 3-کربوکسی -1- سولفوپیریدینیوم کلرید ([NA-SO3H]+Cl-) به عنوان یک کاتالیست یونی قابل بازیافت...
[ 17 ] - سنتز تک ظرف مشتقات تتراهیدرو[b] پیران و پیرانوپیرازول ها با استفاده از آمونیوم فلوئورید
توجه برای توسعه روش های نوین برای سنتز کارآمد ترکیب هایهتروسیکل یک موضوع با اهمیت در شیمی سنتز ترکیب های آلی است. تتراهیدروبنزو[b]پیران ها و پیرانو پیرازول ها ترکیبات هتروسیکلی هستند که در تعدادی از فراورده های طبیعی زیستی مهم وجود دارند. در این پژوهش، آمونیوم فلوئورید به طور موفقیت آمیزی برای انجام واکنش تک ظرفی آلدهیدها، دیمدون یا 1،3-سیکلوهگزادی اون و مالونونیتریل...
[ 18 ] - معرفی بایندر جدید بر پایه CTBN/DEO و بررسی خواص مکانیکی و حرارتی الاستومر حاصل از واکنش پخت
Despite the unique properties of epoxy resins, their use is limited in many cases due to their low impact resistance. One of the methods to overcome this limitation is to use compounds for increase Toughness such as carboxyl-terminated butadiene acrylonitrile (CTBN) (94% Wt) in the epoxy matrix. In this study, investigated the curing reaction of CTBN with 1,2,7,8 diepoxyoctane (DEO)(5% Wt) in t...
Co-Authors