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Heterocycles with a Potential Hydroxy Group

Potential C-hydroxy compounds usually exist as the 0x0 tautomers, unless the hydroxy tautomer is appreciably stabilized by electron withdrawing or chelating substituents. The [Pg.35]

Structure of Five-membered Rings with One Heteroatom [Pg.36]

The interaction of heterocyclic hydroxy- and potential hydroxy-compounds with hexamethylphosphoric triamide (H MPA) at 220— 230 °C replaces the hydroxy- with a dimethylamino-group. The numerous examples include the conversion of saccharin into 3-dimethylaminobenzisothiazole 5 5 -dioxide. In the presence of pyrrolidine, the 3-(l -pyrrolidyl)-compound is obtained. Improved yields of iV-carboxymethyl-l,2-benzisothiazolin-3-one 1,1-dioxide have been obtained from sodium saccharin by the action of sodium bromoacetate, or chloroacetonitrile, followed by hydrolysis. ... [Pg.349]

See other pages where Heterocycles with a Potential Hydroxy Group is mentioned: [Pg.35]    [Pg.35]    [Pg.1204]    [Pg.35]    [Pg.35]    [Pg.35]    [Pg.1204]    [Pg.35]    [Pg.56]    [Pg.56]    [Pg.66]    [Pg.302]    [Pg.364]    [Pg.168]    [Pg.101]    [Pg.66]    [Pg.87]    [Pg.68]    [Pg.77]    [Pg.21]    [Pg.66]    [Pg.78]    [Pg.185]    [Pg.1119]    [Pg.184]    [Pg.228]    [Pg.384]    [Pg.5027]    [Pg.625]    [Pg.68]    [Pg.737]    [Pg.184]    [Pg.245]    [Pg.40]    [Pg.263]    [Pg.265]    [Pg.1]   


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Heterocyclic groups

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