1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one

1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one Basic information
Product Name:1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one
Synonyms:1,2,4-TRIAZOLO-[4,3-A]PYRIDINE-3(2H)-ONE;1,2,4-TRIAZOLE(4,3)PYRIDIN-3-(2H)-ONE;1,2,4-TRIAZOL-(4,3-A)-PYRIDINE 3 (2H)-ONE;1,2,4-Triazolopyridin-3-one;3-HYDROXYTRIAZOLO[4,3-A]PYRIDINE;3-HYDROXY-1,2,4-TRIAZOLO[4,3-A]PYRIDINE;1,2,4-Triazole-(4,3-alpha)pyri;Trazodone Impurity 15
CAS:6969-71-7
MF:C6H5N3O
MW:135.12
EINECS:230-191-8
Product Categories:Heterocycles;intermediate for some organic synthesis;APIs & Intermediate;Pyrimidine;Pyridines;Fused Ring Systems
Mol File:6969-71-7.mol
1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one Structure
1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one Chemical Properties
Melting point 231°C
density 1.51±0.1 g/cm3(Predicted)
storage temp. 2-8°C
solubility DMSO (Slightly), Methanol (Slightly, Heated, Sonicated)
pka7.86±0.20(Predicted)
form Solid
color Light Brown to Brown
BRN 607433
Stability:Light Sensitive
InChIKeyLJRXNXBFJXXRNQ-UHFFFAOYSA-N
LogP0.113
CAS DataBase Reference6969-71-7(CAS DataBase Reference)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany 3
HS Code 29339900
MSDS Information
ProviderLanguage
ALFA English
1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one Usage And Synthesis
Chemical PropertiesBeige Solid
Uses1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one was used to prepare a congener of Trazodone (T718500) which was found to be a potent and selective inhibitor of synaptosomal uptake of 5-hydroxytryptamine.
Synthesis Reference(s)Journal of Medicinal Chemistry, 28, p. 1394, 1985 DOI: 10.1021/jm00148a004
1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one Preparation Products And Raw materials
Raw materialsPyridine-->Semicarbazide hydrochloride-->2-Bromopyridine-->Urea-->2-Chloropyridine-->2-Hydrazinopyridine
Preparation ProductsDiethylacetamide-->Acetic acid-->2-(2-hydroxyethyl)-2H,3H-[1,2,4]triazolo[4,3-a]pyridin-3-one
2-(3-amino-2-hydroxypropyl)-2H,3H-[1,2,4]triazolo[3,4-a]pyridin-3-one 2-[3-[4-(3-Chlorophenyl)-1-piperazinyl]propyl-d6]-1,2,4-triazolo[4,3-a]pyridin-3(2H)-one Hydrochloride 2-[(2-aminophenyl)methyl]-2H,3H-[1,2,4]triazolo[3,4-a]pyridin-3-one 2-[(4-aminophenyl)methyl]-2H,3H-[1,2,4]triazolo[3,4-a]pyridin-3-one 3-(3-oxo[1,2,4]triazolo[4,3-a]pyridin-2(3H)-yl)propanenitrile 2-(3-CHLOROPROPYL)-1,2,4-TRIAZOL-[4,3-A]PYRIDINE-3 (2H)-ONE 2-(3-CHLOROPHENYL)-1,2,4-TRIAZOL-[4,3-A]-PYRIDINE-3-(2H)-ONE (3-OXO[1,2,4]TRIAZOLO[4,3-A]PYRIDIN-2(3H)-YL)ACETIC ACID 2-(oxiran-2-ylmethyl)-2H,3H-[1,2,4]triazolo[3,4-a]pyridin-3-one Sodium Pyrithione 8-CHLORO-6-(TRIFLUOROMETHYL)[1,2,4]TRIAZOLO[4,3-A]PYRIDIN-3-YL ACETATE 2-(CHLOROACETYL)[1,2,4]TRIAZOLO[4,3-A]PYRIDIN-3(2H)-ONE 2-(3-aminobenzyl)[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one 2-(3-(4-(2-quinolyl))-1-piperazinyl)propyl-1,2,4-triazolo(4,3-a)pyridin-3(2H)-one Chromium picolinate 2-(2-BROMOETHYL)[1,2,4]TRIAZOLO[4,3-A]PYRIDIN-3(2H)-ONE 2-[(6-chloropyridin-3-yl)methyl]-2H,3H-[1,2,4]triazolo[3,4-a]pyridin-3-one Furazolidone

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