Title: Pyrithiamine
CAS Registry Number: 534-64-5
CAS Name: 1-[(4-Amino-2-methyl-5-pyrimidinyl)methyl]-3-(2-hydroxyethyl)-2-methylpyridinium bromide monohydrobromide
Additional Names: 1-(2-methyl-4-amino-5-pyrimidyl)methyl-2-methyl-3-hydroxyethylpyridinium bromide hydrobromide; neopyrithiamine
Molecular Formula: C14H20Br2N4O
Molecular Weight: 420.14
Percent Composition: C 40.02%, H 4.80%, Br 38.04%, N 13.34%, O 3.81%
Literature References: Thiamine antagonist prepd by condensation of 2-methyl-3-(b-hydroxyethyl)pyridine with the pyrimidine moiety of vitamin B1: Tracy, Elderfield, J. Org. Chem. 6, 54 (1941); improved procedure: Wilson, Harris, J. Am. Chem. Soc. 71, 2231 (1949); US 2587262 (1952 to Merck & Co.). Cf. Woolley, J. Am. Chem. Soc. 72, 5763 (1950).
Properties: Crystals from acetone, dec 218-220°. uv max (water): 238, 271 nm. Sol in water.
Absorption maximum: uv max (water): 238, 271 nm
Derivative Type: Chloride hydrochloride
Molecular Formula: C14H20Cl2N4O
Molecular Weight: 331.24
Percent Composition: C 50.76%, H 6.09%, Cl 21.41%, N 16.91%, O 4.83%
Properties: Dec 234-236°. uv max (water): 235, 273 nm. Sol in water.
Absorption maximum: uv max (water): 235, 273 nm
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