5311-71-7

Basic information

• Product Name: 3-(4-Methoxyphenyl)-5-methyl-1,2,4-oxadiazole
• Synonyms: 3-(4-Methoxyphenyl)-5-methyl-1,2,4-oxadiazole
• CAS NO: 5311-71-7
• Molecular Formula: C₁₀H₁₀N₂O₂
• Molecular Weight: 190.1986
• Mol File: 5311-71-7.mol

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 3-(4-Methoxyphenyl)-5-methyl-1,2,4-oxadiazole(CAS DataBase Reference)
• NIST Chemistry Reference: 3-(4-Methoxyphenyl)-5-methyl-1,2,4-oxadiazole(5311-71-7)
• EPA Substance Registry System: 3-(4-Methoxyphenyl)-5-methyl-1,2,4-oxadiazole(5311-71-7)

Safety Data

• Hazardous Substances Data: 5311-71-7(Hazardous Substances Data)

Upstream product

• 74903-79-0 N-hydroxy-4-methoxybenzenecarboximidoyl chloride 
• 75-05-8 acetonitrile 
• 3717-21-3 p-methoxyl benzaldoxime 
• 35787-71-4 thianthrene cation radical perchlorate 
• 949-02-0 O-Acetyl-4-methoxy-benzamidoxim 
• 79-20-9 acetic acid methyl ester 
• 5373-87-5 4-methoxybenzamidoxime 
• 127-19-5 N,N-dimethyl acetamide 
• 123-11-5 4-methoxy-benzaldehyde 
• 64-19-7 acetic acid 
• 75-36-5 acetyl chloride 
• 141-78-6 ethyl acetate 
• 3717-22-4 (Z)-para-methoxybenzaldehyde oxime 
• 192332-47-1 para-methoxy-benzamidoxime 

Downstream Products

• 49787-02-2 4-(5-methyl-1,2,4-oxadiazol-3-yl)phenol 

Relevant articles and documents

Imidazole hydrochloride promoted synthesis of 3,5-disubstituted-1,2,4-oxadiazoles

Imidazole hydrochloride as an additive promotes the reaction of amidoximes and DMA derivatives to generated 3,5-disubstituted-1,2,4-oxadiazoles in low to excellent yields without the use of coupling reagents, oxidants, strong acids or bases and other additives.

Potassium Poly(Heptazine Imide): Transition Metal-Free Solid-State Triplet Sensitizer in Cascade Energy Transfer and [3+2]-cycloadditions

Polymeric carbon nitride materials have been used in numerous light-to-energy conversion applications ranging from photocatalysis to optoelectronics. For a new application and modelling, we first refined the crystal structure of potassium poly(heptazine imide) (K-PHI)—a benchmark carbon nitride material in photocatalysis—by means of X-ray powder diffraction and transmission electron microscopy. Using the crystal structure of K-PHI, periodic DFT calculations were performed to calculate the density-of-states (DOS) and localize intra band states (IBS). IBS were found to be responsible for the enhanced K-PHI absorption in the near IR region, to serve as electron traps, and to be useful in energy transfer reactions. Once excited with visible light, carbon nitrides, in addition to the direct recombination, can also undergo singlet–triplet intersystem crossing. We utilized the K-PHI centered triplet excited states to trigger a cascade of energy transfer reactions and, in turn, to sensitize, for example, singlet oxygen (1O2) as a starting point to synthesis up to 25 different N-rich heterocycles.

Efficient Synthesis of Functionalized Indene Derivatives via Rh(III)-Catalyzed Cascade Reaction between Oxadiazoles and Allylic Alcohols

A highly efficient rhodium(III)-catalyzed synthesis of novel functionalized indene derivatives has been achieved via C?H activation/intramolecular aldol condensation. This cascade reaction is an atom economical protocol which could be further applied to build more complex compounds. (Figure presented.).

The reaction of amidoximes with carboxylic acids or their esters under high-pressure conditions

3,5-Disubstituted 1,2,4-oxadiazoles were synthesized by the reaction of amidoximes with carboxylic acids or their esters under high-pressure conditions (10 kbar). The reaction proceeds without the use of other reagents or catalysts. Both aliphatic and aro

Cobalt(III)-Catalyzed Oxadiazole-Directed C-H Activation for the Synthesis of 1-Aminoisoquinolines

Aromatic heterocycles have been identified as effective directing groups (DGs) in C-H functionalization but can be retained as undesired bulky substituents in the final products. Herein, we report a Co(III)-catalyzed 1-aminoisoquinoline synthesis strategy based on oxadiazole-directed aromatic C-H coupling with alkynes and a subsequent redox-neutral C-N cyclization reaction. This labile N-O bond-based protocol has allowed the toleration of a broad range of functional groups.

The first one-pot ambient-temperature synthesis of 1,2,4-oxadiazoles from amidoximes and carboxylic acid esters

The first one-pot room-temperature protocol for the synthesis of 3,5-disubstituted-1,2,4-oxadiazoles via the condensation between amidoximes and carboxylic acid esters in superbase medium MOH/DMSO is reported. A broad spectrum of alkyl, aryl and hetaryl amidoximes and esters was examined. This reaction route provides convenient access to 1,2,4-oxadiazoles, which is highly desirable because in the light of this privileged scaffold is recognized as an important core in the design of novel therapeutic agents and high-tech materials.

Reaction of amidoximes with acetonitrile at high pressure

Reaction of amidoximes with acetonitrile giving 1,2,4-oxadiazoles occurs at 80-100 °C under a pressure of 10 Kbar without catalysts.

Construction of 3,5-substituted 1,2,4-oxadiazole rings triggered by tetrabutylammonium hydroxide: A highly efficient and fluoride-free ring closure reaction of O-acylamidoximes

Tetrabutylammonium hydroxide (TBAH) is an efficient and mild alternative to tetrabutylammonium fluoride (TBAF) for base catalyzed cyclizations of 1,2,4-oxadiazoles from O-acylamidoximes. For most 3,5-substituted 1,2,4-oxadiazoles the reactions were dramatically accelerated by addition of 0.1 equiv of TBAH at room temperature. This method was also more generally applicable allowing for a wider range of substrates. Additionally, due to the absence of fluoride, TBAH will not result in corrosion of reactor vessels and therefore is better suited for large-scale synthesis.

Construction of 3,5-substituted 1,2,4-oxadiazole rings triggered by tetrabutylammonium hydroxide: A highly efficient and fluoride-free ring closure reaction of O-acylamidoximes

Tetrabutylammonium hydroxide (TBAH) is an efficient and mild alternative to tetrabutylammonium fluoride (TBAF) for base catalyzed cyclizations of 1,2,4-oxadiazoles from O-acylamidoximes. For most 3,5-substituted 1,2,4-oxadiazoles the reactions were dramatically accelerated by addition of 0.1 equiv of TBAH at room temperature. This method was also more generally applicable allowing for a wider range of substrates. Additionally, due to the absence of fluoride, TBAH will not result in corrosion of reactor vessels and therefore is better suited for large-scale synthesis.

Synthesis, characterization, and antimicrobial evaluation of oxadiazole congeners

A series of 1,3-oxazole, 1,3-thiazole, isomeric 1,2,4-oxadiazole, 1,3,4-oxadiazole, and 1,2,3,4-tetrazole heterocycles was synthesized. All the compounds shared as a common feature the presence of a 4-hydroxyphenyl substituent. The structures of the synthesized compounds were confirmed by MS, 1H-NMR, and elemental analysis. In vitro antimicrobial activity for all the newly synthesized compounds at concentrations of 200-25 μg/mL was evaluated against Gram+ve organisms such as methicillin-resistant Staphylococcus aureus (MRSA), Gram-ve organisms such as Escherichia coli (E. coli), and the fungal strain Aspergillus niger (A. niger) by the cup plate method. Ofloxacin and ketoconazole (10 μg/mL) were used as reference standards for antibacterial and antifungal activity, respectively. Compounds 15, 16, and 20 showed notable antibacterial and antifungal activities at higher concentrations (200 μg/mL), whereas 17-19 were found to display significant antibacterial or antifungal activity (25-50 μg/mL) against the Gram+ve, Gram-ve bacteria, or fungal cells used in the present study.