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2-Aminothiazole-5-sulfonic acid

Sulfonation under mild conditions is reported to yield thiazolyl-2-sulfamic acid, which, when heated in H2SO4. rearranges to 2-aminothiazole-5-sulfonic acid (16. 374. 390. 391). Postovskfi. however, reports exactly the opposite rearrangement (367). and spectroscopic evidence supports his conclusion (368) (see Section III.5). [Pg.75]

Aminothiazole 179, with chlorosulfonic acid, gives the sulfamic acid 180 which on heating rearranges to 2-aminothiazole-5-sulfonic acid 181 (Equation... [Pg.218]

Thiazole sulfonation occurs only under forcing conditions the action of oleum at 250 °C for 3 hours in the presence of mercury(II) sulfate leads to 65% formation of 5-thiazole sulfonic acid. 4-Methyl- and 2,4-dimethyl-thiazoles undergo sulfonation at the 5-position under equally forcing conditions (oleum, 200 °C). 2-Aminothiazole is sulfonated at low... [Pg.255]

In fuming sulfuric acid (20% oleum) 2 aminothiazole (16. 27. 375. 389) and 2-amino-4-methylthiazole (374. 390) are sulfonated in the 5-position. When this position is substituted as in 2-amino-5-methyl-thiazole (27, 391) very small amounts of 4-sulfonation occur. [Pg.75]

See other pages where 2-Aminothiazole-5-sulfonic acid is mentioned: [Pg.70]    [Pg.504]    [Pg.660]    [Pg.70]    [Pg.100]    [Pg.28]    [Pg.95]    [Pg.450]    [Pg.504]    [Pg.572]    [Pg.95]    [Pg.58]    [Pg.660]    [Pg.95]    [Pg.28]    [Pg.155]    [Pg.1114]    [Pg.450]    [Pg.572]   
See also in sourсe #XX -- [ Pg.504 ]



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