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Heterocyclic compounds Vilsmeier-Haack reaction

Vilsmeier-Haack reaction. Formulation of activated aromatic or heterocyclic compounds with disubstituted formamides and phosphorus oxychloride. [Pg.1316]

Methylbenzimidazole (492 R = Me) yields the benzimidazoline (506) in the Vilsmeier-Haack reaction with DMF-phosphorus oxychloride. Treatment of 2-amino-l-benzhydryl-benzimidazole with sodium in liquid ammonia affords a mixture of 2-nitrobenzimidazole and the azo-compound (507) by an autoxidation process. " The benzimidazole derivative (508), prepared by the action of diphenylamine-2,2 -dicarbonyl chloride on benzimidazole, is dearomatized on heating to give the condensed heterocycle (509). ... [Pg.59]

See other pages where Heterocyclic compounds Vilsmeier-Haack reaction is mentioned: [Pg.52]    [Pg.172]    [Pg.311]    [Pg.52]    [Pg.303]    [Pg.52]    [Pg.303]    [Pg.877]    [Pg.291]    [Pg.291]    [Pg.468]    [Pg.790]    [Pg.790]   
See also in sourсe #XX -- [ Pg.2 , Pg.780 ]

See also in sourсe #XX -- [ Pg.780 ]

See also in sourсe #XX -- [ Pg.780 ]

See also in sourсe #XX -- [ Pg.2 , Pg.780 ]

See also in sourсe #XX -- [ Pg.780 ]



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