Results 11 to 20 of about 12,947 (217)

Synthesis of 2,5-Dialkyl-1,3,4-oxadiazoles Bearing Carboxymethylamino Groups [PDF]

Molecules, 2022
A series of new symmetrical 2,5-dialkyl-1,3,4-oxadiazoles containing substituted alkyl groups at the terminal positions with substituents, such as bromine, isopropyloxycarbonylmethylamino, and carboxymethylamino, were successfully synthesized.
Marcin Łuczyński, Kornelia Kubiesa, Agnieszka Kudelko   +2 more
doaj   +3 more sources

Comparative Study of the Synthetic Approaches and Biological Activities of the Bioisosteres of 1,3,4-Oxadiazoles and 1,3,4-Thiadiazoles over the Past Decade [PDF]

Molecules, 2022
The bioisosteres of 1,3,4-oxadiazoles and 1,3,4-thiadiazoles are well-known pharmacophores for many medicinally important drugs. Throughout the past 10 years, 1,3,4-oxa-/thiadiazole nuclei have been very attractive to researchers for drug design ...
Rana M. El-Masry, Hanan H. Kadry, Azza T. Taher, Sahar M. Abou-Seri   +3 more
doaj   +3 more sources

In Silico Development of Novel Benzofuran-1,3,4-Oxadiazoles as Lead Inhibitors of M. tuberculosis Polyketide Synthase 13 [PDF]

Pharmaceuticals, 2023
Benzofuran and 1,3,4-oxadiazole are privileged and versatile heterocyclic pharmacophores which display a broad spectrum of biological and pharmacological therapeutic potential against a wide variety of diseases.
Ali Irfan, Shah Faisal, Ameer Fawad Zahoor, Razia Noreen, Sami A. Al-Hussain, Burak Tuzun, Rakshanda Javaid, Ahmed A. Elhenawy, Magdi E. A. Zaki, Sajjad Ahmad, Magda H. Abdellattif   +10 more
doaj   +2 more sources

Biologically oriented synthesis of medicines (BIODS) based on heterylpoxid 2,5-disubstituted 1,3,4-oxadiazoles (Part 2)

Aktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2021
Heterocyclic compounds make a very important branch of organic chemistry, and it has always been an interesting area of study in medical chemistry. They are present in a variety of drugs, vitamins and biologically active compounds. Over two decades, 1,
Yu. V. Karpenko, S. M. Kulish, N. А. Al Halaf   +2 more
doaj   +3 more sources

One-Step Construction of 1,3,4-Oxadiazoles with Anticancer Activity from Tertiary Amines via a Sequential Copper(I)-Catalyzed Oxidative Ugi/aza-Wittig Reaction [PDF]

Molecules
An unparalleled copper(I)-catalyzed synthesis of 1,3,4-oxadiazoles from tertiary amines in one step has been described. The one-pot reactions involving (N-isocyanimine)triphenylphosphorane, tertiary amines, and carboxylic acids resulted in the formation ...
Mei Sun, Nong-Qi Mao, Sheng-Long Wang, Xin-Ming Han, Gang Yao, Ping Xue, Chong-Yang Zeng, Yu-Ting Liu, Kai Chen, Xiao-Qing Gao, Jun Xiong   +10 more
doaj   +2 more sources

A Useful Synthesis of 2-Acylamino-1,3,4-oxadiazoles from Acylthiosemicarbazides Using Potassium Iodate and the Discovery of New Antibacterial Compounds [PDF]

Molecules, 2019
A useful method for the synthesis of 2-acylamino-1,3,4-oxadiazoles was developed. By using potassium iodate as an oxidant in water at 60 °C, a wide range of 2-acylamino-1,3,4-oxadiazoles were afforded in moderate to excellent yields within two hours.
Tianlei Li, Gang Wen, Jishun Li, Wenxuan Zhang, Song Wu   +4 more
doaj   +2 more sources

Synthesis and Characterization of Novel 2-Alkyl-1,3,4-Oxadiazoles Containing a Phenylazo Group [PDF]

Molecules
An efficient method for the synthesis of novel phenylazo-containing moieties is described. The derivatives of 5-(4-(phenyldiazenyl)phenyl)-1,3,4-oxadiazole, substituted at position 2 of the heterocyclic scaffold with alkyl groups of different chain ...
Sebastian Górecki, Agnieszka Kudelko
doaj   +2 more sources

Activity Profiling of Nitro-Substituted Di(Hetero)Aryl 1,3,4- and 1,2,4-Oxadiazoles: Antimicrobial, Cholinesterase Inhibition and Antioxidant Potential. [PDF]

Arch Pharm (Weinheim)
Novel nitro‐substituted diaryl 1,3,4‐ and 1,2,4‐oxadiazoles were synthesised via molecular hybridisation of bioactive heterocycles. Selected derivatives exhibited potent antimicrobial activity, including against Mycobacterium tuberculosis and Staphylococcus aureus, and cholinesterase inhibitory activity, with promising selectivity.
Šikorová E, Štěpánková Š, Frýbová E, Konečná K, Korbielová J, Švarcová M, Janďourek O, Pflégr V, Bősze S, Krátký M.   +9 more
europepmc   +2 more sources

A Graphene Acid - TiO₂ Nanohybrid as Multifunctional Heterogeneous Photocatalyst for the Synthesis of 1,3,4-Oxadiazoles. [PDF]

ACS Appl Mater Interfaces, 2022
The immobilization of TiO2 nanoparticles on graphene acid (GA), a conductive graphene derivative densely functionalized with COOH groups, is presented.
Sciarretta M, Barawi M, Navío C, Shea VAPO, Blanco M, Alemán J.   +5 more
europepmc   +2 more sources

2:1 Adducts Arising from Reactions between Benzynes and 1,3,4-Oxadiazoles. [PDF]

Org Lett
2:1 adducts arise from the reaction of 2,5-diaryl-1,3,4-oxadiazoles and benzynes generated from the hexadehydro-Diels–Alder (HDDA) reaction. Density functional theory computations support a mechanistic manifold that includes a concerted SNAr process ...
Guzman AL, Kevorkian PV, Hoye TR.
europepmc   +3 more sources