Synthesis, in-vitro α-glucosidase inhibition, antioxidant, in-vivo antidiabetic and molecular docking studies of pyrrolidine-2,5-dione and thiazolidine-2,4-dione derivatives
摘要:
alpha-Glucosidase is considered as a therapeutic target for the treatment of type 2 diabetes mellitus (DM2). In current study, we synthesized pyrrolidine-2,5-dione (succinimide) and thiazolidine-2,4-dione derivatives and evaluated for their ability to inhibit alpha-Glucosidase. Pyrrolidine-2,5-dione derivatives (11a-o) showed moderate to poor alpha-glucosidase inhibition. Compound 11o with the IC50 value of 28.3 +/- 0.28 mu M emerged as a good inhibitor of alpha-glucosidase. Thiazolidine-2,4-dione and dihydropyrimidine (TZD-DHPM) hybrids (22a-c) showed excellent inhibitory activities. The most active compound 22a displayed IC50 value of 0.98 +/- 0.008 mu M. Other two compounds of this series also showed activity in low micromolar range. The in-vivo antidiabetic study of three compounds 11n, 11o and 22a were also determined using alloxan induced diabetes mice model. Compounds 11o and 22a showed significant hypoglycemic effect compared to the reference drug. In-vivo acute toxicity study showed the safety of these selected compounds. In-silico docking studies were carried out to rationalize the in-vitro results. The binding modes and bioassay results of TZD-DHPM hybrids showed that interactions with important residues appeared significant for high potency.
<i>N,N′</i>-Dialkyl-4-Aryl-3,4-Dihydropyrimidinones and Thiones: Ceric Ammonium Nitrate Catalyzed Synthesis and Molecular Structure Determination by X-ray Crystallography
作者:Chingrishon Kathing、Sushil Kumar、Shokip Tumtin、Nongthombam Geetmani Singh、Jims World Star Rani、Ridaphun Nongrum、Rishanlang Nongkhlaw
DOI:10.1002/jhet.2735
日期:2017.3
This work presents a microwave assisted solvent‐free synthesis of N,N′‐dialkyl‐4‐aryl‐3,4‐dihydropyrimidinones/thiones in the presence of Ceric Ammonium Nitrate (CAN) via direct condensation of aromatic aldehydes, β‐keto ester, and N,N′‐dialkylurea/thiourea. The highlights of the methodology adopted are (i) facile condensation of the reactants into product without any side‐products, and (ii) short
这项工作提出了在硝酸铈铵(CAN)存在下通过芳族醛,β-酮酸酯的直接缩合在微波辅助下无溶剂合成N,N'-二烷基-4-芳基-3,4-二氢嘧啶酮/硫酮的方法,以及N,N'-二烷基脲/硫脲。所采用方法的重点是:(i)反应物易于缩合为无任何副产物的产物;(ii)反应时间短,产率高,纯度高。所有合成的化合物都通过光谱技术(例如FTIR,1 H NMR,13 C NMR和Mass)进行了表征和建立。该化合物的结构通过单晶X射线衍射分析得到了进一步证实。
Efficient synthesis of 3,4-dihydropyrimidin-2-ones in low melting tartaric acid–urea mixtures
A general, efficient and green method for the synthesis of dihydropyrimidinones is described under mild conditions employing low melting mixtures of L-(+)-tartaric acid and urea derivatives as a novel reaction medium. The melt plays a triple role: as solvent, as catalyst and as reactant, furnishing highly functionalized dihydropyrimidinones in good to excellent yields.