Synthesis of 2-(2-methoxyphenyl)-5-phenyl-1,3,4-oxadiazole derivatives and evaluation of their antiglycation potential
摘要:
In the search of potent antidiabetic drug, we synthesized 1-25 2-(2-methoxyphenyl)-5-phenyl-1,3,4-oxadiazole derivatives. First, we synthesized 2-methoxybenzohydrazide from methyl 2-methoxybenzoate which was treated with different arylaldehydes to afford 1-25 compounds. The synthesized compounds were evaluated for antiglycation activity. We found that 1-6 and 8 showed potent activity ranging from 160.2 to 290.17 A mu M better than standard drug rutin (IC50 = 295.09 +/- A 1.04 A mu M). All the synthesized compounds were characterized by different spectroscopy methods. These compounds can further be studied to develop lead antidiabetic compounds.
A One-Pot Synthesis-Functionalization Strategy for Streamlined Access to 2,5-Disubstituted 1,3,4-Oxadiazoles from Carboxylic Acids
作者:Daniel Matheau-Raven、Darren J. Dixon
DOI:10.1021/acs.joc.2c01669
日期:2022.9.16
4-oxadiazole synthesis-arylation strategy for accessing 2,5-disubstituted1,3,4-oxadiazoles, from carboxylic acids, N-isocyaniminotriphenylphosphorane (NIITP), and aryl iodides, is reported. The reaction sequence, featuring a second stage copper-catalyzed 1,3,4-oxadiazole arylation, was found to tolerate (hetero)aryl, alkyl, and alkenyl carboxylic acids, and (hetero)aryl iodide coupling partners. The effectiveness
报道了一种从羧酸、N-异氰亚氨基三苯基正膦 (NIITP) 和芳基碘化物中获得 2,5-二取代 1,3,4-恶二唑的一锅法 1,3,4-恶二唑合成-芳基化策略。该反应序列具有第二阶段铜催化的 1,3,4-恶二唑芳基化反应,可耐受(杂)芳基、烷基和烯基羧酸,以及(杂)芳基碘化物偶联配偶体。五种含羧酸 API 的后期功能化证明了两阶段策略的有效性,并且还证明了使用N-苯甲酰氧基胺偶联伙伴合成胺化 1,3,4-恶二唑的扩展。
Structure–activity relationships of tyrosinase inhibitory combinatorial library of 2,5-disubstituted-1,3,4-oxadiazole analogues
作者:Mahmud Tareq Hassan Khan、Muhammad Iqbal Choudhary、Khalid Mohammed Khan、Mubeen Rani、Atta-ur-Rahman
DOI:10.1016/j.bmc.2005.03.012
日期:2005.5
Here the tyrosinase inhibition studies of library of 2,5-disubstituted-1,3,4-oxadiazoles have been reported and their structure-activity relationship (SAR) also have been discussed. The library of the oxadiazoles was synthesized under the microwave irradiation and was structures of these were characterized by different spectral techniques. From this study it could be concluded that for a better inhibition of tyrosinase, electronegative substitution is essential as most probably the active site of the enzyme contain some hydrophobic site and position is also very important for the inhibition purposes due to the conformational space. The electronegativity of the compounds is somewhat proportional to the inhibitory activity. The compound 3e (3 '-[5-(4 '-bromophenyl)-1,3,4-oxadiazol-2-yl]pyridine) exhibited most potent (IC50 = 2.18 mu M) inhibition against the enzyme tyrosinase which is more potent than the standard potent inhibitor L-mimosine IC50 = 3.68 mu M). This molecule can be the best candidate as a lead compound for further development of drug for the treatments of several skin disorders. (c) 2005 Elsevier Ltd. All rights reserved.