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Pyrazole dimethylamino-, alkylation

Dimethylaminopyrazoles react with alkylating agents to afford quaternary salts (72BSF2807). The nitrogen atom of the dimethylamino group is the most reactive in the case of 3-dimethylamino- and 4-dimethylamino-pyrazoles (formation of 456 and 457 salts, respectively) whereas 5-dimethylaminopyrazoles yield aminopyrazolium salts (458). [Pg.261]

Substituted pyrazoles can be prq>ared by the alkylation of a-(dimethylamino)nitriles with bromodi-ethyl acetal followed by heating with hydrazine dihydrochloride in ethanol. 3,5-Dialkylpyrazoles were... [Pg.557]

See other pages where Pyrazole dimethylamino-, alkylation is mentioned: [Pg.771]    [Pg.771]    [Pg.771]    [Pg.771]    [Pg.771]    [Pg.771]    [Pg.771]    [Pg.771]    [Pg.191]    [Pg.52]    [Pg.280]   
See also in sourсe #XX -- [ Pg.450 ]



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Pyrazoles, alkylation

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