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N-fluoropyridinium-2-sulfonates

In addition to modulation of the general reactivity by choice of substituents with different electron demand, Umemoto and coworkers described a method of increasing the selectivity of the fluorination, particularly for phenols and aromatic urethanes in the ortho-position [183b, 190], In the reaction of N-fluoropyridinium-2-sulfonate the electrophilic fluorine is supposedly directed by a combination of Jt n donor-acceptor interaction and electrostatic (hydrogen) bonding to a specific position (Scheme 2.85). [Pg.77]

Scheme 2.85 Directed ortho-fluorination of phenols by N-fluoropyridinium-2-sulfonates [190],... Scheme 2.85 Directed ortho-fluorination of phenols by N-fluoropyridinium-2-sulfonates [190],...
See other pages where N-fluoropyridinium-2-sulfonates is mentioned: [Pg.124]    [Pg.647]   
See also in sourсe #XX -- [ Pg.77 ]



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