GB190019202A - The Manufacture of Substituted Amido-benzoic Acids, and of Anthranilic Acid and Colouring Matters therefrom. - Google Patents

The Manufacture of Substituted Amido-benzoic Acids, and of Anthranilic Acid and Colouring Matters therefrom.

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Publication number
GB190019202A
GB190019202A GB190019202DA GB190019202A GB 190019202 A GB190019202 A GB 190019202A GB 190019202D A GB190019202D A GB 190019202DA GB 190019202 A GB190019202 A GB 190019202A
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United Kingdom
Prior art keywords
acid
acetylamidobenzoic
solution
amido
produced
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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Inventor
George Beloe Ellis
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Individual
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Individual
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Publication of GB190019202A publication Critical patent/GB190019202A/en
Expired legal-status Critical Current

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Abstract

19,202. Ellis, G. B., [Pertsch, F. A.]. Oct. 26. 5-Amido 2-acetylamidobenzoic acid is produced by heating 5-nitro 2-amidobenzoic acid with glacial acetic acid and ace ic anhydride at 125‹ C. for six hours. and reducing the 5-nitro-2 acetylamidobenzoic acid thus formed bv means of zinc and acetic acid or by other reducing-agents. Anthranilic acid is produced by diazotizing 5-amido-2-acetylamidobenzoic acid in solution in absolute alcohol by means of a current of nitrous acid at 10‹ C., expelling the excess of nitrous acid by a current of dry air, boiling the diazo solution for one hour, expelling the alcohol, and then hydrolyzing the acetylamido group by heating with hydrochloric acid. The anthranilic acid is extracted from the solution either by adding sodium acetate and extracting with ether, or by precipitating it from the acid solution by means of an excess of ammonium acetate. Dyes, artificial, are produced from 5-amido-2-. acetylamidobenzoic acid by coupling its diazo compound with a molecular proportion of a phenol or an amine, such as a naphthol or naphthylamine sulphonic acid. The dyes thus obtained are converted into others by splitting off the acetyl group, diazotizing again, and combining the diazo compound with another molecular proportion of a phenol or amine.
GB190019202D 1900-10-26 1900-10-26 The Manufacture of Substituted Amido-benzoic Acids, and of Anthranilic Acid and Colouring Matters therefrom. Expired GB190019202A (en)

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Application Number Priority Date Filing Date Title
GB190019202T 1900-10-26

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GB190019202A true GB190019202A (en) 1901-10-26

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Application Number Title Priority Date Filing Date
GB190019202D Expired GB190019202A (en) 1900-10-26 1900-10-26 The Manufacture of Substituted Amido-benzoic Acids, and of Anthranilic Acid and Colouring Matters therefrom.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515320A (en) * 1946-11-06 1950-07-18 Heyden Chemical Corp Processes for the production of n-acylated amino-substituted carboxylic acids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515320A (en) * 1946-11-06 1950-07-18 Heyden Chemical Corp Processes for the production of n-acylated amino-substituted carboxylic acids

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