Präzisierung der Konstitution der Sulfonierungsprodukte von o-Toluidin
Sulfonation of o-toluidine (1) in oleum yields only 2-amino- toluene-4-sulfonic acid (4), while the isomeric 2-aminotoluene- 5-sulfonic acid (2) can be prepared solely by baking the acid sulfate salt of 1. Further sulfonation of 4 afforded 2-amino- toluene-4,5-disulfonic acid (6) whose structure wa...
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| Main Authors: | , |
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| Format: | Article |
| Language: | deu |
| Published: |
Swiss Chemical Society
1972-06-01
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| Series: | CHIMIA |
| Online Access: | https://www.chimia.ch/chimia/article/view/9014 |
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| Summary: | Sulfonation of o-toluidine (1) in oleum yields only 2-amino- toluene-4-sulfonic acid (4), while the isomeric 2-aminotoluene- 5-sulfonic acid (2) can be prepared solely by baking the acid sulfate salt of 1. Further sulfonation of 4 afforded 2-amino- toluene-4,5-disulfonic acid (6) whose structure was proven by deamination to toluene-3,4-disulfonic acid (8). The latter was independently synthesized from 4-aminotoluene-3-sulfonic acid (7) by successive treatment with potassium ethyl xanthate, hydrolysis and oxidation.
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| ISSN: | 0009-4293 2673-2424 |