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SjvAr mechanism

Besides fluorine the influences of another substiments such as Cl, CF3, NO2, CN on fluorine displacement in 2,4,6-trifluoropyrimidine were studied. The results (Table 8) can be satisfactory rationahzed in terms of bimolecular additional-elimination SjvAr mechanism through Meisenheimer type complexes [157]. [Pg.329]

When at least one of the aryl groups is substituted with at least one strongly electron withdrawing group (e.g. nitro or cyano) at the ortho or para position then there is evidence that the SjvAr mechanism, involving the formation of Meisenheimer-type complexes, can become a competitive pathway (Scheme 9). ... [Pg.284]

See other pages where SjvAr mechanism is mentioned: [Pg.329]    [Pg.329]    [Pg.466]    [Pg.1268]    [Pg.598]   
See also in sourсe #XX -- [ Pg.242 , Pg.249 ]

See also in sourсe #XX -- [ Pg.97 , Pg.98 , Pg.99 , Pg.242 , Pg.243 , Pg.244 , Pg.245 , Pg.246 , Pg.247 , Pg.248 , Pg.275 , Pg.276 , Pg.277 , Pg.278 , Pg.279 , Pg.280 , Pg.281 , Pg.284 , Pg.285 , Pg.286 , Pg.287 ]



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