counter anion displacementreactions of unstable pyridine-F2 compounds, fluorination of salts of pyridines with protonic acids or silyl esters with F2, and/ or fluorination of Lewis acid complexes of pyridines. The scope of each method was examined in detail. Each of the N-fluoropyridinium salts was assigned as the first stable 1 : 1 salt structure of the pyridine nucleus and halogenatom on the basis
N-fluoropyridinium-Sulfonates and a process for their preparation
申请人:Sagami Chemical Research Center
公开号:US05081249A1
公开(公告)日:1992-01-14
A class of N-fluoropyridinium-sulfonates is provided along with a processw for making same. Starting pyridine sulfonic acids and acid salts are fluorine substituted at the pyridine nitrogen atom with dilute gaseous fluorine under liquid phase contacting conditions. The N-fluorine substituted products are excellent fluorinating agents which exhibit high specificity.