Zhe-Shan Quan

Bio: Zhe-Shan Quan is an academic researcher from Wonkwang University. The author has contributed to research in topics: Triazole & Furocoumarin. The author has an hindex of 3, co-authored 9 publications receiving 28 citations.

Synthesis of 4-Phenylthieno[2,3-e][1,2,4]triazolo[4,3-a]pyrimidine-5(4H)-one Derivatives and Evaluation of Their Anti-inflammatory Activity

Abstract: A series of 4-phenylthieno[2,3-e][1,2,4] triazolo[4,3-a]pyrimidine-5(4H)-ones (5a-p) with triazole or other heterocyclic substituents (6-11) was synthesized and the compounds were evaluated for their anti-inflammatory activity using the xylene-induced ear-edema test. Pharmacological analyses showed that the compound 4-(4-chlorophenyl)thieno[2,3-e][1,2,4]triazolo[4,3-a]pyrimidine-5(4H)-one (5m) exhibited the greatest anti-inflammatory activity (50.48% inhibition, 30 min after intraperitoneal administration) and was more potent than the reference drug, indomethacin. The peak activity of 5m was observed 4 h after oral administration, and it showed a higher anti-inflammatory activity than indomethacin did at a dose of 100 mg/kg.

Recent developments on triazole nucleus in anticonvulsant compounds: a review

Abstract: Epilepsy is one of the common diseases seriously threatening life and health of human. More than 50 million people are suffering from this condition and anticonvulsant agents are the main treatment. However, side effects and intolerance, and a lack of efficacy limit the application of the current anticonvulsant agents. The search for new anticonvulsant agents with higher efficacy and lower toxicity continues to be the focus and task in medicinal chemistry. Numbers of triazole derivatives as clinical drugs or candidates have been frequently employed for the treatment of various types of diseases, which have proved the importance of this heterocyclic nucleus in drug design and discovery. Recently many endeavours were made to involve the triazole into the anticonvulsants design, which have brought lots of active compounds. This work is an attempt to systematically review the research of triazole derivatives in the design and development of anticonvulsant agents during the past two decades.

Synthesis of 8-alkoxy-4,5-dihydro-[1,2,4]triazole[4,3-a]quinoline-1-ones and evaluation of their anticonvulsant properties.

Abstract: A series of 8-alkoxy-4,5-dihydro-[1,2,4]triazole[4,3-a]quinoline-1-one derivatives were synthesized using 7-hydroxy-3,4-dihydro-2(1H)-quinolone as the starting material. Their anticonvulsant activities were evaluated by the maximal electroshock test (MES) and the subcutaneous pentylenetetrazole test (sc-PTZ), and their neurotoxicities were measured by the rotarod neurotoxicity test (Tox). The tests demonstrated that 8-hexyloxy-4,5-dihydro-[1.2.4]triazole[4.3-a]quinoline-1-one (4e) and 8-heptyloxy-4,5-dihydro-[1,2,4] triazole[4,3-a]quinoline-1-one (4f) were the most potent anticonvulsants, with4e having ED50 values of 17.17 mg/kg and 24.55 mg/kg and protective index (PI=TD50/ED50) values of 41.9 and 29.3 in the MES and sc-PTZ tests, respectively, and4f having ED50 values of 19.7 mg/kg and 21.2 mg/kg and PI values of 36.5 and 33.9 in the MES and sc-PTZ tests, respectively. The PI values of4e and4f were many fold better than that of the marketed drugs phenytoin, carbamazepine, phenobarbital and valproate, which have PI values in the range of 1.6–8.1 in the MES test and <0.22–5.2 in the sc-PTZ test. Structure-activity relationships were also discussed.

Application of triazoles in the structural modification of natural products.

Abstract: Nature products have been extensively used in the discovery and development of new drugs, as the most important source of drugs. The triazole ring is one of main pharmacophore of the nitrogen-containing heterocycles. Thus, a new class of triazole-containing natural product conjugates has been synthesised. These compounds reportedly exert anticancer, anti-inflammatory, antimicrobial, antiparasitic, antiviral, antioxidant, anti-Alzheimer, and enzyme inhibitory effects. This review summarises the research progress of triazole-containing natural product derivatives involved in medicinal chemistry in the past six years. This review provides insights and perspectives that will help scientists in the fields of organic synthesis, medicinal chemistry, phytochemistry, and pharmacology.