1,3,4-Oxadiazole

1,3,4-Oxadiazole is a nitrogen and oxygen containing heterocycle, and one of the four isomers of oxadiazole.[1][2]

1,3,4-Oxadiazole

Names
IUPAC name 1,3,4-Oxadiazole
Identifiers
CAS Number	288-99-3
3D model (JSmol)	Interactive image
ChemSpider	87937
PubChem CID	97428
UNII	20O2F20OUR
CompTox Dashboard (EPA)	DTXSID10182987
InChI InChI=1S/C2H2N2O/c1-3-4-2-5-1/h1-2H Key: FKASFBLJDCHBNZ-UHFFFAOYSA-N
SMILES C1=NN=CO1
Properties
Chemical formula	C2H2N2O
Molar mass	70.051 g·mol^−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Derivatives

1,3,4-Oxadiazole itself is not commonly used in organic chemistry, but many of its derivatives are important. For example, raltegravir is an HIV drug which contains an 1,3,4-oxadiazole ring. Other pharmaceutical drugs containing the 1,3,4-oxadiazole ring include fenadiazole, zibotentan, and tiodazosin.

1,3,4-Oxadiazole derivatives can be synthesized in a variety of ways.[3] One pathway is from oxidation of tetrazoles in the presence of aldehydes.[4] Similarly, the reaction of tetrazoles with acyl chlorides provides oxadiazoles.[5] Both methods involve the release of N₂.

See also

• Furazan (1,2,5-oxadiazole)

References

1. PubChem. "1,3,4-Oxadiazole". pubchem.ncbi.nlm.nih.gov. National Center for Biotechnology Information, U.S. National Library of Medicine. Retrieved 2019-07-22.
2. Bala, Suman; Kamboj, Sunil; Kajal, Anu; Saini, Vipin; Prasad, Deo Nanadan (2014). "1,3,4-Oxadiazole Derivatives: Synthesis, Characterization, Antimicrobial Potential, and Computational Studies". BioMed Research International. 2014: 172791. doi:10.1155/2014/172791. PMC 4131560. PMID 25147788.
3. "1,3,4-Oxadiazole synthesis". www.organic-chemistry.org. Retrieved 11 November 2018.
4. Wang, Liang; Cao, Jing; Chen, Qun; He, Mingyang (17 April 2015). "One-Pot Synthesis of 2,5-Diaryl 1,3,4-Oxadiazoles via Di-tert-butyl Peroxide Promoted Acylation of Aryl Tetrazoles with Aldehydes". The Journal of Organic Chemistry. 80 (9): 4743–4748. doi:10.1021/acs.joc.5b00207. PMID 25860162.
5. Wong, Michael Y.; Krotkus, Simonas; Copley, Graeme; Li, Wenbo; Murawski, Caroline; Hall, David; Hedley, Gordon J.; Jaricot, Marie; Cordes, David B.; Slawin, Alexandra M. Z.; Olivier, Yoann; Beljonne, David; Muccioli, Luca; Moral, Monica; Sancho-Garcia, Juan-Carlos; Gather, Malte C.; Samuel, Ifor D. W.; Zysman-Colman, Eli (7 September 2018). "Deep-Blue Oxadiazole-Containing Thermally Activated Delayed Fluorescence Emitters for Organic Light-Emitting Diodes". ACS Applied Materials & Interfaces. 10 (39): 33360–33372. doi:10.1021/acsami.8b11136. hdl:10023/18433. PMID 30192504.