Letters in Drug Design & Discovery - Volume 16, Issue 3, 2019

Background: The synthesis of high value risedronic acid is not fully resolved, as, for the time being, the best method based on the preparation from 3-pyridylcarboxylic acid by reaction with phosphorus trichloride in methanesulfonic acid gives risedronic acid in a good yield, but in an unpure form. Methods: Alternative protocols realizing the synthesis in sulfolane as the solvent and/or in the presence of suitable IL additive were devel Read More

Background: (±)-6,8-Dihydroxy-3-undecyl-3,4-dihydroisochromen-1-one is one of the structural analog of several substituted undecylisocoumarins isolated from Ononis natrix (Fabaceae), has been successfully synthesized by direct condensation of homopthalic acid (1) with undecanoyl chloride yields isochromen-1-one (2). Methods: Alkaline hydrolysis of (2) gave the corresponding keto-acid (3), which is then reduced to hydroxy Read More

Background: The role of small molecules as antioxidants to prevent the oxidation of other molecules and inhibit them from radical formation is the area of much interest to cure disease especially cancer. Moreover, the antioxidants play important role as stabilizers to prevent oxidation of fuels and lubricants. Methods: In the present study, fifteen tetrakis-Schiff&'s bases derivatives (1-15) were synthesized and screened for their Read More

Background: Alkaline Phosphatase (AP) is a physiologically important metalloenzyme that belongs to a large family of ectonucleotidase enzymes. Over-expression of tissue non-specific alkaline phosphatase has been linked with ectopic calcification including vascular and aortic calcification. In Vascular Smooth Muscles Cells (VSMCs), the high level of Reactive Oxygen Species (ROS) resulted in the up-regulation of TNAP. Accordin Read More

Background: Quinoline scaffold acts as “privileged structure” for anticancer drug design. Certain derivatives showed good results through different mechanisms as topoisomerase 1 and kinase inhibition. Methods: A new series of 2-chloro-3-(2-amino-3-cyano-4H-chromene, 4H-pyranyl and fused 1- cyclohexen-4-yl)quinoline structures (3-5, 6 and 7) were designed, synthesized, and evaluated for their in vitro antitumor activity. All c Read More

Background: Several strategies have been reported for the synthesis of thiazole derivatives. Methods: However, many of these methods suffer from several drawbacks. Several modifications have been made to counter these problems. Here, we have synthesized a new series of 2-(2-((1HImidazol- 4-yl)methylene)hydrazinyl)-4-(4-substitutedphenyl)thiazoles without using the catalyst at room temperature. Results: The s Read More

Background: Combined in-silico and in-vitro approaches were adopted to investigate the antiplasmodial activity of Catharanthus roseus and Tylophora indica plant extracts as well as their isolated components (vinblastine, vincristine and tylophorine). Methods: We employed molecular docking to prioritize phytochemicals from a library of 26 compounds against Plasmodium falciparum multidrug-resistance protein 1 (PfM Read More

Background: Development of novel antimalarial agents has been one of the sought areas in medicinal chemistry. In this study the same was done by virtual screening of in-house database on developed QSAR model. Methods: A six point pharmacophore model was generated (AADHRR.56) from 41 compounds using PHASE module of Schrodinger software and used for pharmacophore based search. Docking studies of the obtaine Read More

Background: Pseudomonas aeruginosa is an opportunistic pathogen that causes chronic infections in immunocompromised patients. The inhibition of Quorum Sensing (QS) system has been recognized as an attractive strategy for the treatment of P. aeruginosa infections. In the present study, a series of novel 2-methyl-3-[4-(substituedaminosulfonyl)phenyl]-4(3H)-quinazolinones (1-8) were synthesized and tested for their biofilm f Read More

Background: Structural similarity in Chalcone and Pyrazoline brought our intention for the analysis of such compounds. This study involved the synthesis of chalcones and their pyrazoline derivatives and their screening as cholinesterase inhibitors. The newly synthesized compounds were also investigated for their antioxidant potential. Methods: Chalcones were synthesized by well-established methods of synthesis and their Read More

Background: Aurones, (Z)-2-benzylidenebenzofuran-3-one derivatives, are naturallyoccurring structural isomers of flavones, with promising pharmacological potential. Methods: In this study, the structural requirements for the inhibition of porcine pancreatic α- amylase by hydroxylated or methoxylated aurone derivatives were investigated by assessing their in vitro biological activities against porcine pancreatic α-amylase. Read More

Background: Benzimidazole and piperidine rings are important pharmacophore groups for drug design studies. Objective: In this study, we aimed to investigate the antidepressant-like activity of some 2-(4- substituted-phenyl)-1-[2-(piperidin-1-yl)ethyl]-1H-benzimidazole derivatives. Methods: Tail-suspension Test (TST) and Modified Forced Swimming Tests (MFST) were used to assess antidepressant-like activities of the test compou Read More

Background: N-Acetylserotonin (NAS, N-acetyl-5-hydroxytryptamine) is the immediate precursor of the neurohormone melatonin (MT, N-acetyl-5-methoxytryptamine), which regulates sleep and wake cycles. NAS is produced by the N-acetylation of serotonin and is converted to melatonin via the action of Acetylserotonin O-methyltransferase (ASMT). Like melatonin, NAS acts as an agonist on the melatonin receptors MT1, MT2, Read More

Background: A phytochemical study on medicinal plants used for the treatment of fever and malaria in Africa yielded metabolites with potential antiplasmodial activity, many of which are Anthraquinones (AQ). AQs have similar sub-structure as naphthoquinones and xanthones, which were previously reported as novel antiplasmodial agents. Objective: The present study aimed to investigate the structural requirements of 9,1 Read More

Background: Antimicrobial resistance is a major threat to human health. So this manuscript describes the synthesis of five different 3,5-disubstituted 4,5-dihydroisoxazoles with antimicrobial activity. Methods: They were obtained from nitrile oxide cycloaddition derived from 2-furaldehyde and 5- nitro-2-furaldehyde to different dipolarophiles (acrylamide, ethyl acrylate and styrene). All heterocycles were isolate Read More