Design, Synthesis and Biological Evaluation of Spiro Cyclohexane-1,2- Quinazoline Derivatives as Potent Dipeptidyl Peptidase IV Inhibitors

Author(s): Yasmin M. Syam, Somaia S. Abd El-Karim, Tamer Nasr*, Samia A. Elseginy, Manal M. Anwar*, Mohsen M. Kamel, Hanan F. Ali

Journal Name: Mini-Reviews in Medicinal Chemistry

Volume 19 , Issue 3 , 2019

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Graphical Abstract:


Objective: Inhibition of dipeptidyl peptidase IV (DPP-4) is currently one of the most valuable and potential chemotherapeutic regimes for the medication of Type 2 Diabetes Mellitus (T2DM).

Method: Based on linagliptin, this study discusses the design, synthesis and biological evaluation of spiro cyclohexane-1,2'-quinazoline scaffold hybridized with various heterocyclic ring systems through different atomic spacers as a highly potent DPP-4 inhibitors. DPP-4 enzyme assay represented that most of the target compounds are 102-103 folds more active than the reference drug linagliptin (IC50: 0.0005-0.0089 nM vs 0.77 nM; respectively). Moreover, in vivo oral hypoglycemic activity assay revealed that most of the tested candidates were more potent than the reference drug, sitagliptin, producing rapid onset with long duration of activity that extends to 24 h. Interestingly, the derivatives 11, 16, 18a and 23 showed evidence of mild cytochrome P450 3A4 (CYP3A4) inhibition (IC50; > 210 µM) and their acute toxicity (LD50) was more than 1.9 gm/kg. Molecular simulation study of the new quinazoline derivatives explained the obtained biological results.

Conclusion: Finally, we conclude that our target compounds could be highly beneficial for diabetic patients in the clinic.

Keywords: Antidiabetic agents, linagliptin, DPP-4 inhibition, molecular docking, Quinazoline, Gewald reaction.

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Article Details

Year: 2019
Published on: 11 January, 2019
Page: [250 - 269]
Pages: 20
DOI: 10.2174/1389557517666170828121018
Price: $65

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