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230138

Sigma-Aldrich

Oxazole

98%

Synonym(s):

1,3-Oxazole, 3-Azafuran

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About This Item

Empirical Formula (Hill Notation):
C3H3NO
CAS Number:
288-42-6
Molecular Weight:
69.06
Beilstein/REAXYS Number:
103851
EC Number:
206-020-8
MDL number:
MFCD00009751
UNSPSC Code:
12352100
PubChem Substance ID:
24853776
NACRES:
NA.22

assay

98%

refractive index

n20/D 1.425 (lit.)

bp

69-70 °C (lit.)

mp

−87-−84 °C (lit.)

density

1.05 g/mL at 25 °C (lit.)

SMILES string

c1cocn1

InChI

1S/C3H3NO/c1-2-5-3-4-1/h1-3H

InChI key

ZCQWOFVYLHDMMC-UHFFFAOYSA-N

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General description

Oxazole is the parent molecule for a large class of heterocyclic aromatic compounds. It is a weak base that can be used as an electron-deficient diene in the Diels-Alder cycloaddition reaction. It undergoes nitration, sulfonation, halogenation, Friedel-Crafts alkylation, and acylation.

Application

Oxazole can be used:
  • in the intramolecular Diels–Alder (IMDA) cycloaddition reaction to synthesis natural products
  • as a precursor in the ring opening, nucleophilic addition and recyclization as well as [2 + 2], [3 + 2], and [4 + 2] cycloaddition reactions

accessory

Product No.
Description
Pricing

pictograms

FlameCorrosion
GHS02,GHS05

signalword

Danger

hcodes

H225,H318

Hazard Classifications

Eye Dam. 1 - Flam. Liq. 2

Storage Class

3 - Flammable liquids

wgk_germany

WGK 3

flash_point_f

66.2 °F - closed cup

flash_point_c

19 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
0000328259
0000328258
0000328259
0000328258
MKCW8941

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