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Merck
CN

P57204

Pyridazine

98%

Synonym(s):

1,2-Diazabenzene, 1,2-Diazine, o-Diazine

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About This Item

Empirical Formula (Hill Notation):
C4H4N2
CAS Number:
Molecular Weight:
80.09
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
EC Number:
206-025-5
Beilstein/REAXYS Number:
103906
MDL number:
Assay:
98%
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InChI key

PBMFSQRYOILNGV-UHFFFAOYSA-N

InChI

1S/C4H4N2/c1-2-4-6-5-3-1/h1-4H

SMILES string

c1ccnnc1

assay

98%

Quality Level

refractive index

n20/D 1.524 (lit.)

bp

208 °C (lit.)

mp

−8 °C (lit.)

density

1.103 g/mL at 25 °C (lit.)

General description

Pyridazine is a mono-basic 1,2-diazine compound, which is commonly prepared by the reaction of 1,4-dicarbonyls with hydrazines. Pyridazine ring is found in many herbicides like credazine, pyridatol and many pharmaceutical drugs like cefozopran, olaparib, talazoparib, and cadralazine.

Application

Pyridazine can be used:
  • As a building block to synthesize N-phenyl-4-pyrazolo[1,5-b]pyridazin-3-yl-pyrimidin-2-amine derivatives as GSK-3 inhibitors.
  • As a starting material in the synthesis of pharmacologically important pyrrolo[1,2-b]pyridazine derivatives.
  • To prepare 1-(6-ethoxy-6-oxohexyl)pyridazin-1-ium bromide and 1-(2-bromoacetyl) pyridazinium bromide ionic liquids as corrosion inhibitors of steel under acidic conditions.

Storage Class

10 - Combustible liquids

wgk

WGK 3

flash_point_f

185.0 °F - closed cup

flash_point_c

85 °C - closed cup

ppe

Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)


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Gernot Nuss et al.
Inorganic chemistry, 50(24), 12632-12640 (2011-11-19)
Reaction of potassium tris(mercapto-tert-butylpyridazinyl)borate K[Tn(tBu)] with copper(II) chloride in dichloromethane at room temperature led to the diamagnetic copper boratrane compound [Cu{B(Pn(tBu))(3)}Cl] (Pn = pyridazine-3-thionyl) (1) under activation of the B-H bond and formation of a Cu-B dative bond. In contrast
Six membered heterocyclic compounds with two or more heteroatoms
Heterocyclic Chemistry (2010)
Scott S Walker et al.
Antimicrobial agents and chemotherapy, 55(11), 5099-5106 (2011-08-17)
The echinocandins are a class of semisynthetic natural products that target β-1,3-glucan synthase (GS). Their proven clinical efficacy combined with minimal safety issues has made the echinocandins an important asset in the management of fungal infection in a variety of
The diazines: Pyridazine, pyrimidine, and pyrazine: reactions and synthesis
Heterocyclic Chemistry (2013)
Ying Zhao et al.
ChemMedChem, 7(5), 861-870 (2012-03-15)
Dihydropteroate synthase (DHPS) is the validated drug target for sulfonamide antimicrobial therapy. However, due to widespread drug resistance and poor tolerance, the use of sulfonamide antibiotics is now limited. The pterin binding pocket in DHPS is highly conserved and is

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