Search

The increased burden of cancer disease globally arouses the urgent need for the development of novel chemical agent with improved efficacy and potency which can provide selective therapeutic outcome to an individual cancer patient. In this connection the in-silico designing of novel scaffolds are greatly helpful evading the need for synthesizing and evaluating the series of large number compounds. We have constructed novel pyrazolopyrimidines with reference to existing fused pyrimidine standards like central aromatic heterocycles, spacers, hydrophobic heads and tails. We examined for the nature and biochemical targets, ADMET evaluations using various online tools and molecular docking analysis through Schrodinger suite studied binding affinities with reference to standards as well as co-crystals. We designed pyrazolopyrimidines 7a-j and 12a-j along with molecular docking studies revealed that few were potential candidates compared to standard scores against various target kinases. The hydroxyl moiety in 7b & 7d, hydroxyl in 7e with 4-bromo showed more bonding affinity towards targets and remaining compounds produced mild to moderate affinities against various targets. GLU339, GLU51, LEU83, SER345, ASP404, ASN391, and ASP348 are major residues for H-bonding interactions, PHE80, LEU83, GLN275 influenced hydrophobic bonding and ASP404 for nitro group, GLU339 for hydroxyl group, LYS89 for methoxy groups are key residues in binding affinity. We also identified the key residues of target proteins involved in the interaction with ligands at the active pocket. We believe that these results could benefit the future development of anticancer scaffold containing pyrazolopyrimidine motifs in the core structure. [ABSTRACT FROM AUTHOR]

The dominance of N-Heterocycles' in chemical sciences, especially in drugs and pharmacological agents, makes them fascinating to advance their sustainable chemistry. Besides, the microwave technique enables functioning at higher temperatures beyond the boiling point of the reaction medium to offer adequate chemical transformations, which tend to be hassled with the classical approach. Herein, we have discussed microwave-assisted chemical transformations of paramount N-heterocycles (five- and six-membered) from the past decade. The role of microwave technique and its benefits has been emphasized in terms of reaction time, product yields, neat and clean reaction products, chemo/regio/enantioselectivity, and mild reaction conditions to achieve efficient transformations. [ABSTRACT FROM AUTHOR]