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2-Pyridylhydrazones, anodic oxidation

Triaza-Compounds. 2-(Ethoxymethyleneamino)pyridine is converted into the triazolopyridine (564) by the action of hydroxylamine-O-sulphonic acid. Anodic oxidation of the hydrazone Ar NHN=CHAr (Ar =p-NO2C6H4, Ar = /7-MeC6H4) in the presence of pyridine and tetraethyl-ammonium perchlorate affords the salt (565). Oxidative cyclization of the pyridylhydrazone PyCH=NNHPy (Py = 2-pyridyl) by means of mercury(II) acetate yields compound (566). 2,4,6-Triphenylpyrylium fluoroborate reacts with amidrazones ArC(NH2)=NNH2 in the presence of triethylamine to give the pyrazolopyrimidines (567). The tricyclic compound (568) is... [Pg.277]

See other pages where 2-Pyridylhydrazones, anodic oxidation is mentioned: [Pg.16]    [Pg.351]    [Pg.5014]   
See also in sourсe #XX -- [ Pg.16 , Pg.83 ]

See also in sourсe #XX -- [ Pg.16 , Pg.83 ]

See also in sourсe #XX -- [ Pg.16 , Pg.83 ]

See also in sourсe #XX -- [ Pg.16 , Pg.83 ]



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2-Pyridylhydrazones, anodic oxidation oxidative cyclisation

Anode oxidation

Anodes oxides

Anodic oxidation

Anodic oxides

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