Sohan Rezayati

Department of Chemistry, Payame Noor University, Tehran, P.O. Box 19395-4697, Iran.

[ 1 ] - 1-(1-Propylsulfonic)-3-methylimidazolium chloride Brønsted acidic ionic liquid catalyzed one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives under solvent-free conditions

A rapid, green and efficient method for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives through a one-pot condensation of 2-naphthol with various aromatic aldehydes in the presences of several acidic ionic liquids including [PSMIM]Cl, [BMIM]HSO4, [BMIM]Cl, [BMIM]Br, and [BMIM]BF4 as organocatalysts and task-specific acidic ionic liquids (AILs) under solvent-free conditions is desc...

[ 2 ] - Phospho sulfonic acid: an efficient solid acid catalyst for the facile preparation of 1,4-dihydropyridines

A simple and mild one-pot three-component reaction for the preparation 1,4-dihydropyridines has been developed from various aldehyde substrates, 1,3-dicarbonyl compounds (dimedone) and ammonium acetate (Hantzsch method) in the presence of a catalytic amount of phospho sulfonic acid (PSA) as an efficient and heterogeneous solid acid in EtOH at room temperature. Preparation of PSA is straightforw...

[ 3 ] - Isoquinoline Promoted Synthesis of alkyl 2-(1-alkyl-5-oxo-3-phenyl-2-thioxotetrahydro-4H-imidazol-4-yliden) acetate derivatives

Derivatives of thiazolidinone ring systems are known to act as anti-HIV infections , analgesic, anti-bacterial, anti-convulsant, anti parasitic, potential anti-inflammatory and herbicidal agents. Due biological activities of thiazolidinones ring, several methods for their synthesis have been illustrated in literature. Imidazolidine-2-thiones were synthesized by the oxidative cyclization of 1-be...

[ 4 ] - Synthesis of methyl 2-[2-(alkylimino)-4-oxo-3-phenyl-1,3-thiazolan-5-yliden]acetate derivatives under solvent-free condition

An efficient synthesis of Methyl 2-[2-(alkylimino)-4-oxo-3-phenyl-1,3-thiazolan-5-yliden]acetate derivatives via simple three-component reaction and one-pot reactions between isoquinoline, dimethyl acetylenedicarboxylate and N-phenylthiourea under solvent-free conditions without using any additional catalyst, is described. The mild reaction conditions and good yields and exhibit the synthetic a...

[ 5 ] - Dipyridine cobalt chloride as an efficient and chemoselective catalyst for the synthesis of 1,1-diacetates under solvent-free conditions

1,1-Diacetates(acylals) were prepared by direct condensation of various aldehydes with acetic anhydride using dipyridine cobalt chloride (CoPy2Cl2) as an efficient and green catalyst under solvent-free conditions at room temperature. The important features of this catalyst method are that the catalyst is solid, stable at high temperatures, soluble in water, stable in air, immiscible in common o...

[ 6 ] - Hantzsch reaction using [Mesi]Cl as a new, efficient and BAIL catalyst

In this work, the efficiency, generality and applicability of new Bronsted acidic ionic liquid (BAIL) 1-methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium chloride {[Msei]Cl} as heterogeneous and green catalyst for organic transformations are studied. Herein, the following one-pot multi-component reactions in the presence of [Msei]Cl are investigated: (i) the synthesis of quinoxaline derivatives fr...

[ 7 ] - Fe2+ Supported on Hydroxyapatite-core-shell-γ-Fe2O3 Nanoparticles as an Inexpensive and Magnetically-recoverable Catalyst for Rapid Synthesis of Benzimidazoles and Benzoxazole Derivatives

A simple and facile method for the preparation ofFe2+ supported on hydroxyapatite-core-shell-γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp-Fe2+ NPs) as an environmentally friendly and recyclable green catalyst is described and used for the one-pot synthesis of benzimidazoles and benzoxazole derivatives via reactions between aromatic aldehyd...

[ 8 ] - چارچوب فلز- آلی Zn3(BTC)2 : کاتالیزگر قابل بازیافت و هتروژن برای سنتز ترکیبات 5،1-بنزودی آزپین

در این مقاله با روشی ساده و ملایم ترکیبات 5،1-بنزودی آزپین با استفاده از تراکم مشتقات اورتو فنیلن دی آمین و کتون های خطی یا حلقوی در مجاورت مقادیر کاتالیزوری از چارچوب فلز-آلی نانوحفره Zn3(BTC)2 در حلال اتانول و دمای50 درجه سانتیگراد سنتز شدند. تمام محصولات با بازدههای بالا (%95-86) بهدست آمدند. چارچوب فلز-آلی نانوحفره Zn3(BTC)2 به کار برده شده، دارای مزایایی از جمله غیرسمی بودن، پایدار بودن در...