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243086

Sigma-Aldrich

Pyridine hydrochloride

98%

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Synonym(s):
Pyridinium chloride
Empirical Formula (Hill Notation):
C5H5N · HCl
CAS Number:
628-13-7
Molecular Weight:
115.56
Beilstein:
3615340
EC Number:
211-027-4
MDL number:
MFCD00012802
eCl@ss:
39151701
PubChem Substance ID:
24854598
NACRES:
NA.22

Quality Level

200

Assay

98%

bp

222-224 °C (lit.)

mp

145-147 °C (lit.)

solubility

ethanol: soluble 50 mg/mL, clear, colorless to light yellow

SMILES string

Cl[H].c1ccncc1

InChI

1S/C5H5N.ClH/c1-2-4-6-5-3-1;/h1-5H;1H

InChI key

AOJFQRQNPXYVLM-UHFFFAOYSA-N

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General description

Pyridine hydrochloride is an acidic type demethylating agent used as a catalyst in deprotection of aromatic methyl ethers.

Application

Pyridine hydrochloride (pyridine hydrochloride) was used in the demethylation of 4,5-dimethyl-7-methoxy-1-tetralone.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302 - H315 - H319

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Demethylation of methyl aryl ethers using pyridine hydrochloride in solvent-free conditions under microwave irradiation.
Kulkarni PP, et al.
J. Chem. Res. Synop., 6, 394-395 (1999)
Microwave Mediated Dearylation of 2-Aryloxy-5-Nitropyridine
Kher S et al.
Research Journal of Chemical Sciences, 2231, 606X-606X (2011)
Tatyana N Sevastyanova et al.
Molecular pharmacology, 86(5), 492-504 (2014-08-13)
Metabotropic glutamate receptors (mGluRs) function as dimers. Recent work suggests that mGluR1 and mGluR5 may physically interact, but the nature and functional consequences of this relationship have not been addressed. In this study, the functional and pharmacological consequences of this
Jipan Yu et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 19(13), 4271-4277 (2013-02-13)
Efficient copper-catalyzed aerobic oxidative C-H and C-C functionalization of 1-[2-(arylamino)aryl]ethanones leading to acridones has been developed. The procedure involves cleavage of aromatic C-H and acetyl C-C bonds with intramolecular formation of a diarylketone bond. The protocol uses inexpensive Cu(O2CCF3)2 as
Harry Adams et al.
Journal of the American Chemical Society, 135(5), 1853-1863 (2013-01-31)
The association constants for a family of 96 closely related zinc porphyrin-pyridine ligand complexes have been measured in two different solvents, toluene and 1,1,2,2-tetrachloroethane (TCE). The zinc porphyrin receptors are equipped with phenol side arms, which can form intramolecular H-bonds
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