119071-51-1

Basic information

• Product Name: C₅H₄ClFN⁽¹⁺⁾*BF₄^(1-)
• Synonyms: C₅H₄ClFN⁽¹⁺⁾*BF₄^(1-)
• CAS NO: 119071-51-1
• Molecular Weight: 219.349
• Mol File: 119071-51-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: C₅H₄ClFN⁽¹⁺⁾*BF₄^(1-)(CAS DataBase Reference)
• NIST Chemistry Reference: C₅H₄ClFN⁽¹⁺⁾*BF₄^(1-)(119071-51-1)
• EPA Substance Registry System: C₅H₄ClFN⁽¹⁺⁾*BF₄^(1-)(119071-51-1)

Safety Data

• Hazardous Substances Data: 119071-51-1(Hazardous Substances Data)

Upstream product

• 109-09-1 2-chloropyridine 

Downstream Products

• 109-09-1 2-chloropyridine 
• 2402-78-0 2,6-dichloropyridine 
• 1513-65-1 2,6-difluoro pyridine 
• 20885-12-5 2-chloro-6-fluoropyridine 

Relevant articles and documents

Preparation of 2-Fluoropyridines via Base-Induced Decomposition of N-Fluoropyridinium Salts

N-Fluoropyridinium salts with either BF4-, SbF6-, or PF6- as a counteranion were treated with excess base such as triethylamine at room temperature to give 2-fluoropyridine in good yield.This method was succesfully applied to the preparation of 2-fluoropyridine derivatives possessing electron-donating or -withdrawing substituents using substituted N-fluoropyridinium tetrafluoroborates.Pyridine-F2 compounds produced through reactions of pyridines with molecular fluorine were also treated with base to give 2-fluoropyridines but in low yields.These reactions are considered to occur through a carbene mechanism as follows: a novel N-F-containing cyclic carbene (3), generated from the N-fluoropyridinium salts by 2-proton abstraction, reacts with fluorine atoms from counteranions such as BF4-, SbF6-, or PF6-, followed by elimination of F- from the N-F moiety, to yield 2-fluoropyridines.Previously reported findings in reactions of pyridines with molecular fluorine are explained on the basis of this mechanism.