1851-22-5

Basic information

• Product Name: 3-CHLOROPYRIDINE N-OXIDE
• Synonyms: 3-Chloro-pyridine1-oxide;Pyridine, 3-chloro-, 1-oxide (6CI,7CI,8CI,9CI);N-oxy-3-chloropyridine;3-chloro-1-oxidanidyl-pyridin-1-ium;3-chloro-1-oxido-pyridin-1-ium;3-chloro-1-oxidopyridin-1-ium;3-chloro-1$l^{5}-pyridin-1-one
• CAS NO: 1851-22-5
• Molecular Formula: C₅H₄ClNO
• Molecular Weight: 129.54436
• Product Categories: PYRIDINE;pharmacetical;Pyridines;Bases & Related Reagents;Nucleotides;Heterocycle-Pyridine series
• Mol File: 1851-22-5.mol
• Article Data: 23

Chemical Properties

• Melting Point: 57-58 °C
• Boiling Point: 310 °C at 760 mmHg
• Flash Point: 141.3 °C
• Appearance: /
• Density: 1.27 g/cm³
• Vapor Pressure: 0.00113mmHg at 25°C
• Refractive Index: 1.552
• Storage Temp.: Refrigerator
• Solubility: soluble in Methanol
• PKA: 0.01±0.10(Predicted)
• CAS DataBase Reference: 3-CHLOROPYRIDINE N-OXIDE(CAS DataBase Reference)
• NIST Chemistry Reference: 3-CHLOROPYRIDINE N-OXIDE(1851-22-5)
• EPA Substance Registry System: 3-CHLOROPYRIDINE N-OXIDE(1851-22-5)

Safety Data

• Hazardous Substances Data: 1851-22-5(Hazardous Substances Data)

Usage

Chemical Properties

Yellow Low Melting Solid

Uses

3-Chloropyridine N-Oxide (cas# 1851-22-5) is a compound useful in organic synthesis.

InChI:InChI=1/C5H4ClNO/c6-5-2-1-3-7(8)4-5/h1-4H

Upstream product

• 626-60-8 3-Chloropyridine 

Downstream Products

• 14906-61-7 3-methoxypyridine N-oxide 
• 102074-24-8 3-ethoxypyridine-1-oxide 
• 75-50-3 trimethylamine 
• 40971-88-8 8-chlorotrazolo<1,5-a>pyridine 
• 242815-91-4 6-chlorotetrazolo[1,5-a] pyridine 
• 76439-45-7 3-chloro-4-nitropyridine N-oxide 
• 13194-60-0 3-chloro-4-nitropyridine 
• 875293-86-0 3-chloro-2-phenylpyridine N-oxide 
• 61719-62-8 N-3-ethyl-pyridine-3,4-diamine 
• 14773-50-3 3-ethoxypyridine 
• 7295-76-3 3-methoxypyridine 
• 111042-90-1 methyl 3-amino-thieno[3,2-b]pyridine-2-carboxylate 
• 636-73-7 3-pyridinesulfonic acid 
• 16110-09-1 2,5 dichloropyridine 

Relevant articles and documents

Chemistry of the phenoxathiins and isosterically related heterocycles. XI (1). The synthesis and 13C-NMR spectroscopy of 2-azaphenoxathiin

-

Visible-Light-Induced ortho-Selective Migration on Pyridyl Ring: Trifluoromethylative Pyridylation of Unactivated Alkenes

The photocatalyzed ortho-selective migration on a pyridyl ring has been achieved for the site-selective trifluoromethylative pyridylation of unactivated alkenes. The overall process is initiated by the selective addition of a CF3 radical to the alkene to provide a nucleophilic alkyl radical intermediate, which enables an intramolecular endo addition exclusively to the ortho-position of the pyridinium salt. Both secondary and tertiary alkyl radicals are well-suited for addition to the C2-position of pyridinium salts to ultimately provide synthetically valuable C2-fluoroalkyl functionalized pyridines. Moreover, the method was successfully applied to the reaction with P-centered radicals. The utility of this transformation was further demonstrated by the late-stage functionalization of complex bioactive molecules.

Synthesis method of heterocyclic compound 3-methoxypyridine

The invention discloses a synthesis method of a heterocyclic compound 3-methoxypyridine. The method comprises the following steps: putting raw materials, i.e., 3-halogenated pyridine, hydrogen peroxide and acetic acid into a three-mouth flask, carrying out reaction for 4-8h at the temperature of 40-80 DEG C under the condition of stirring, recovering the acetic acid, adding a saturated sodium carbonate solution and stirring to enable a system to be alkaline, evaporating to remove water, then adding chloroform for washing, and carrying out vacuum distillation to obtain N-oxide-3-halogenated pyridine; respectively adding the N-oxide-3-halogenated pyridine, metal salt of alkyl alcohol, a catalyst A and alcohol into the three-mouth flask, carrying out reflux reaction for 5-8h under the condition of stirring, then cooling, neutralizing a product to be neutral, and carrying out distillation to obtain N-oxide-3-alkyloxypyridine; respectively adding the N-oxide-3-alkyloxypyridine, ferric trichloride, hydrazine hydrate, activated carbon and ethanol into the three-mouth flask, carrying out reaction at the temperature of 70 DEG C for 3h, cooling to room temperature, and carrying out vacuum distillation to obtain the 3-methoxypyridine. The synthesis method is high in intermediate conversion rate, mild in reaction conditions, safe in operation, low in price of raw materials and easy in raw material obtaining, thus being suitable for industrial production.