Organic chemistry
Rahimeh Hajinasiri; Sanaz Baravardeh; Sobhan Rezayati
Volume 5, Issue 1, pp. 1-120, Serial No. 14 , January 2017, , Pages 52-57
Abstract
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 ...
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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-benzoyl-3-aryl-thioureas with bromine and enolizable carbonyl compounds in the presence of excess triethylamine . A suitable method for the synthesis of fused thiazoles were described from the reaction of aroylphenyl thioureas with π-acceptor quinones. An efficient and one-pot method for the synthesis alkyl 2-(1-alkyl-5-oxo-3-phenyl-2-thioxotetrahydro-4H-imidazol-4-yliden) acetate derivatives via simple reaction between isoquinoline, dialkyl acetylenedicarboxylate and benzyl phenylthiourea under solvent-free conditions without using any additional catalyst, is described. The mild reaction conditions and good yields and exhibit the synthetic advantage of this method. Also this method is environmentally friendly.
Organic chemistry
Abolfazl Olyaei; Zohreh Derikvand; Fatemeh Noruzian; Mahdieh Sadeghpour
Volume 4, Issue 3, pp. 236-358, Serial No. 12 , July 2016, , Pages 337-346
Abstract
Al-MCM-41 nanoreactors is found to be a remarkable efficient catalyst for one-pot multicomponent cyclocondensation of benzil, aniline or ammonium acetate and aromatic aldehydes for the synthesis of polysubstituted imidazoles under solvent-free conditions. The reaction was efficiently promoted by 10 mg ...
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Al-MCM-41 nanoreactors is found to be a remarkable efficient catalyst for one-pot multicomponent cyclocondensation of benzil, aniline or ammonium acetate and aromatic aldehydes for the synthesis of polysubstituted imidazoles under solvent-free conditions. The reaction was efficiently promoted by 10 mg nano-Al-MCM-41 and the heterogeneous catalyst was recycled for four runs in this reaction without losing its catalytic activity. The key advantages of this process are operational simplicity, reusable catalyst, shorter reaction time, convenient work-up procedures, avoiding the use of organic solvents and purification of products by non-chromatographic methods. By this advantage, several polysubstituted imidazoles as pharmaceutical important molecules can be prepared in high yield and high purity.