In the present research work, the motto was to develop new chemical entities as potential anti-inflammatory, analgesic and antipyretic agents. Various 4-(2-amino-6-(substituted)pyrimidin-4-yl)-3-methyl-1-(substituted)-1H-pyrazol-5(4H)-one derivatives (5a-5j) and their Schiff bases (6a-6j) were synthesized. The newly synthesized compounds were characterized by TLC and spectral data. The compounds containing pyrazolone and amino pyrimidine as basic moieties (5a-5j), were screened for their anti-inflammatory, analgesic and antipyretic activities, compounds 5a, 5c-5f, 5h exhibited activities nearly similar to the standard. The pharmacological studies reveal that the presence of 4-hydroxy, 4-methoxy, 4-(N,N-dimethylamino) or 2-hydroxy groups on phenyl ring at C6 of amino pyrimidine exhibits anti-inflammatory, analgesic and antipyretic activities nearly similar to the standard and substitutions like 4-chloro, 2-nitro, 3-nitro or 4-nitro on same phenyl ring lead to a decrease in activities.

<p class="Abstract">New series of pyrazoline spacer compounds were prepared by the reaction between benzimidazole chalcones and (2-methyl-5-nitro-imidazole-1-yl)-acetic acid hydrazide by the sensible use of Michael addition. The building blocks used for the synthesis of pyrazoline derivatives were opted by using virtual screening by molinspiration search engine. The hypothetically resulted pyrazoline spacer compounds from this list are checked for their reliability on other in silico drug designing online web services like PASS online bioactivity, Swiss ADME predictor. The docking study on final four pyrazoline compounds was carried out using Accelrys Discovery Studio 3.5. These synthesized compounds were, later, characterized with the help of UV, IR, mass and ¹H NMR techniques. These compounds were further screened for their in vitro antimalarial effect. The PASS, Swiss ADME assisted docking approach and the use of combo heterocyclic ring with pyrazoline scaffold were found to be beneficial to derive and synthesize effective antimalarial agents in the present study.</p><p class="Abstract"><strong>Video Clip of Methodology</strong>:</p><p class="Abstract">6 min 20 sec:   <a href="https://www.youtube.com/v/RWwaZuG1j9E">Full Screen</a>   <a href="https://www.youtube.com/watch?v=RWwaZuG1j9E">Alternate</a></p>

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In the present study we have synthesized ester prodrugs (Pa-i) of Metoprolol (I) by using pthalic anhydride and derivatives of succinic and maleic anhydride. Different codrugs (COa-i) were synthesized from prodrugs of metoprolol. All the codrugs were characterized by melting point, FTIR, NMR and Mass Spectroscopy. The chemical hydrolysis of COa-i were investigated at the pH 1.2, 6.8 and 7.4. Presence of maleate, methyl maleate, dimethyl maleate and succinate group as linker were found to possess good hydrolysis when compared to that of other substitutes. Among the synthesized codrugs, COf is found to be the best one among the series

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