Sharif Digital Repository

We have reported a new and efficient synthesis of a broad spectrum of heterotetracyclic thiopyranoindole via knovenagel hetero diels alder reaction.Fused pyrimidines have attracted considerable attention in synthetic organic chemistry because of their wide range of biological activities pharmaceutical and therapeutic properties, and antibacterial, antiviral, antitumor, and anti-inflammatory activities. We have reported a new efficient method for synthesis of pyrimidines fused to coumarine, uracile, cyclohexane and triamino pyrimidine structures. The major benefits of the current study are high yields, short reaction times, mild reaction conditions and available materials..We have also... 

Formation of C-C and C-hetero atom bonds in coupling reactions is among the most important organic chemistry reactions, which is useful for achieving the complex molecules from simple ones. The goal of this thesis, was using the organometallic and also metal free methods in coupling reactions and getting the advantage of them in the synthesis of novel hit compounds. In this way, some novel reactions were designed and some novel catalysts were synthesised and identified. Finally, computational quantum chemistry and computational drug design were used as powerful tools for supporting the reaction mechanism, electronic and structural studies and pharmacological evaluation. C-X bond activation... 

Spirooxindole compounds are naturally occurring compounds and have significant biological activities due to their unique spatial structure. Spirooxindole compounds, especially spiro oxindoles containing acyclic ring at C-3 position of oxindole, have high interaction capability with large productions. Therefore, these compounds are important in medicinal chemistry. The method used for the synthesis of spirooxindole compounds has been introduced. In general, for the synthesis of these compounds, isatin derivatives are used in 1 and 3 dipolar reactions in the presence of various solvents and catalysts. Due to the presence of quaternary spiro carbon with sp3 hybridization in the structure of... 

In this work, a new catalyst based on gold nanoparticles immobilized on magnetic GO (graphene oxide) has been introduced. A new ligand based on pyridine has been used to the functionalization of GO to design robust heterogeneous catalyst for reduction in a short time using a low amount of the catalyst. The prepared catalyst was employed in the synthesis of aromatic amines using various types of nitroarnes in water. This catalyst is readily prepared from available starting materials and also is a reusable catalyst having very good stability to air and moisture. The proposed procedure applied here can conduct the reactions under milder reactions. Finally, due to total removal of the... 

Spirocycles have been employed both as core structures and appended to the periphery of molecules in drug discovery. The major advantage that spirocycles offer as core structures is their inherent three-dimensional nature and concomitant ability to project functionality in all three dimensions. Spirocycles have been employed both as core structures and appended to the periphery of molecules in drug discovery. The major advantage that spiro cyclesoffer as core structures is their inherent three-dimensional nature and concomitant ability to project functionality in all three dimensions. However, to take full advantage of spirocycles, the ability to control stereochemistry at multiple positions...