AbstractAngiotensin‐converting enzyme inhibitors are widely used in treating arterial hypertension, acting on the renin‐angiotensin‐aldosterone system and controlling blood pressure. We present a novel, greener, and faster methodology to assess the 1,2,4‐oxadiazol‐5‐one ring and perform molecular modifications to obtain angiotensin‐converting enzyme (ACE) inhibitors using this heterocyclic core. Molecular docking simulations indicate that the tested compounds exhibited an affinity for the ACE binding site, with scores comparable to the commercial inhibitor lisinopril. However, in vitro assays revealed that the compounds were ineffective in inhibiting ACE activity. The lack of inhibition may be related to the compounds' more apolar nature. These results emphasize the importance of integrating computational and experimental approaches in developing new drugs, providing valuable insights for planning future studies to optimize the activity of synthesized compounds.
Transition-metal-catalyzed, directed intermolecular C–Hbond functionalization is synthetically useful but heavily underexplored in multiheteroatom heterocycle synthesis. Herein we report a cobalt catalytic method for the formation of a three-nitrogen-bearing benzotriazine scaffold via the coupling of arylhydrazine and oxadiazolone. This synthetic protocol features a low-cost base metal catalyst, a
C–H Activation-Engaged Synthesis of Diverse Fused-Heterocycles from the Reactions of 3-Phenyl-1,2,4-oxadiazol-5(2<i>H</i>)-ones with Vinylene Carbonate
We report the condition-controlled C–H activation-engaged reactions of 3-phenyl-1,2,4-oxadiazol-5(2H)-ones with vinylene carbonate, straightforwardly constructing four divergent fused-heterocycles by tuning the reaction conditions in a one-pot manner.
我们报告了 3-phenyl-1,2,4-oxadiazol-5(2 H )-ones 与碳酸亚乙烯酯的条件控制 C-H 活化参与反应,通过调整反应条件直接构建了四个不同的稠合杂环一锅法。
Synthesis of Pyrazolidinone-Fused Benzotriazines through C–H/N–H Bond Functionalization of 1-Phenylpyrazolidinones with Oxadiazolones
作者:Na Li、Bin Li、Fan Yu、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.3c00194
日期:2023.7.7
Presented herein is an efficient synthesis of pyrazolidinone-fused benzotriazines through the cascade reaction of 1-phenylpyrazolidinones with oxadiazolones. The formation of the title products is initiated by Rh(III)-catalyzed C–H/N–H bond metallation of 1-phenylpyrazolidinone and subsequent coordination with oxadiazolone followed by migratory insertion along with CO2 liberation, proto-demetallation
Discovery of novel heterocyclic derivatives containing oxadiazolone or pyrimidinone cores as DPP‐4 inhibitors
作者:Sidney Gustavo Diniz Feitosa、Ilária Martina Silva Lins、Larissa Gonçalves Maciel、Janaína Versiani dos Anjos
DOI:10.1002/jhet.4811
日期:2024.6
Type 2 diabetes is a chronic disease characterized by insulin resistance and alterations in incretin secretion, such as the glucagon‐like peptide‐1 (GLP‐1) hormone. GLP‐1 plays a crucial role in signaling insulin production in the pancreas, with its activity regulated by the dipeptidyl peptidase 4 (DPP‐4) enzyme. DPP‐4 presents an intriguing strategy for controlling type 2 diabetes. This study focuses on synthesizing 22 novel oxadiazolone and pyrimidinone derivatives, in vitro DPP‐4 inhibition, and elucidating binding modes through molecular docking simulations. Nine compounds showed promising inhibitory activity, with IC50 values ranging from 0.3 to 1.86 mM. Molecular docking simulations revealed interactions between these compounds and critical residues in the enzyme's active site, such as Arg125, Glu206, Ser630, and His740. This investigation introduces a new class of DPP‐4 inhibitors, providing insights into the design of more potent molecules as potential candidates for combating type 2 diabetes. The findings contribute to developing innovative therapeutics for managing this prevalent metabolic disorder.
Tertiary Amines as Temporary Masked Secondary Amines: A Direct Access to 5-Dialkylamino-1,2,4-oxadiazoles from 1,2,4-Oxadiazol-5(4H)-ones
tertiary amines as temporary masked secondary amines to synthesize 5-dialkylamino 1,2,4-oxadiazoles via Ph3P-I2 mediated amination of 1,2,4-oxadiazol-5(4H)-ones was developed. A one-step N-dealkylative functionalization of tertiary amines with the 1,2,4-oxadiazole ring enables a convenient access to diverse 5-amino-1,2,4-oxadiazoles. Additionally, orthogonally functionalizedpiperazinederivatives can be