Diazonium fluoroborates halides

Reaction of aryl organometallic compounds with halogens Aryl halide exchange halo-denitration halo-dehydroxylation Reaction between diazonium salts and iodide ion Heating of diazonium fluoroborates (Schiemann)... [Pg.1658]

Brockmann and Dorlars561 converted diazonium halides into phenols in the presence of phosphoric acid. Treating diazonium fluoroborates with glacial acetic acid gives phenol esters, which can be deacylated in the usual way.562 Diazonium trifluoroacetates are relatively stable and can be converted by warming into phenols in good yield.563... [Pg.344]

Sandmeyer reaction in dimethyl sulfoxide Halides from diazonium fluoroborates... [Pg.150]

The conversion of ArN2 salts into ArH takes place in hexamethyl-phosphoramide (by a long radical chain process), and also by the use of the naphthalene anion radical CioHs" in THF. Alternatively, deamination of ArNH2 can be carried out with Bu ONO in DMF. Unsymmetrical biaryls can be formed in a phase-transfer reaction between the diazonium fluoroborate (in an arene solvent) and KOAc complexed with 18-crown-6 polyether. ° Meerwein aryl-ation of fluorinated olefins with ArN2 and copper(ii) halides has been described, but an alternative procedure for the overall addition of ArHal to an alkene involves the use of ArNH2, Bu ONO, and copper(ii) halides in acetone or... [Pg.287]

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