Isoxazoline

Isoxazoline

2-isoxazoline
3-isoxazoline
4-isoxazoline
Names
Systematic IUPAC name Respective to images: 4,5-Dihydroisoxazole 2,5-Dihydroisoxazole 2,3-Dihydroisoxazole
Other names Respective to images: Δ2-isoxazoline Δ3-isoxazoline Δ4-isoxazoline
Identifiers
CAS Number	2-isoxazoline: 504-73-4 3-isoxazoline: 214059-36-6 4-isoxazoline: 6569-19-3
3D model (JSmol)	2-isoxazoline: Interactive image 3-isoxazoline: Interactive image 4-isoxazoline: Interactive image
ChEBI	CHEBI:87553
PubChem CID	2-isoxazoline: 12304501
CompTox Dashboard (EPA)	2-isoxazoline: DTXSID90486713
InChI 2-isoxazoline: InChI=1S/C3H5NO/c1-2-4-5-3-1/h2H,1,3H2 Key: WEQPBCSPRXFQQS-UHFFFAOYSA-N
SMILES 2-isoxazoline: C1CON=C1 3-isoxazoline: C1CONC=1 4-isoxazoline: C1=CONC1
Properties
Chemical formula	C3H5NO
Molar mass	71.079 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

Isoxazolines are a class of five-membered heterocyclic chemical compounds, containing one atom each of oxygen and nitrogen which are located adjacent to one another. The ring was named in-line with the Hantzsch–Widman nomenclature. They are structural isomers of the more common oxazolines and exist in three different isomers depending on the location of the double bond. The relatively weak N-O bond makes isoxazolines prone to ring-opening and rearrangement reactions.