CH96144A - A process for the production of p-aminobenzoic acid n-a-butyl ether. - Google Patents
A process for the production of p-aminobenzoic acid n-a-butyl ether.Info
- Publication number
- CH96144A CH96144A CH96144DA CH96144A CH 96144 A CH96144 A CH 96144A CH 96144D A CH96144D A CH 96144DA CH 96144 A CH96144 A CH 96144A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- ether
- butyl ether
- butyl
- aminobenzoic acid
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Procédé pour la production de l'éther n-a-butylique de l'acide p-aminobenzoïque. Selon le brevet principal n 90590, on pré pare l'éther ri-a-butylique de l'acide p-amino- benzoïque par éthérification de l'acide p-ami- nobenzoïque avec l'alcool butylique normal primaire.
On a trouvé que l'éther n-a-butylique de l'acide p-amirroberizoïque peut également être obtenu en éthérifiant de l'acide p-nitro- benzoïque avec l'alcool butylique normal pri maire et en réduisant l'éther obtenu.
Exemple: De l'acide p-nitrobenzoïque est d'abord transformé en chlorure de p-nitrobenzoyle, puis on chauffe à ébullition un mélange équi- moléculaire de ce chlorure de p-nitrobenzoyle et d'alcool butylique normal primaire jusqu'à cessation du dégagement d'acide chlorhydrique, et l'on soumet le produit de réaction à la distillation sous pression réduite. L'éther n-a- butylique de l'acide p-nitrobenzoïque ainsi formé distille.
Pour le réduire en éther-ami e, on peut avoir recours aux méthodes de ré =duction bien connues. En réduisant, par exem- ple, à l'aide de l'étain en présence d'acide chlorhydrique, on obtient le chlorhydrate de l'éther-amine. On le purifie soit par cristalli sation dans l'alcool étendu, soit par distillation sous pression réduite.
Ce nouvel éther ainsi purifié fond à<B>59</B> C et distille entre 173 C et 174 C sous 8 mm de mercure. Cet éther est très peu soluble dans l'eau; 1 litre d'eau distillée dissout à la température ordinaire 13 centigrammes.
L'éther ri-a-butylique de l'acide p-nitro- benzoïque n'est pas encore connu. Purifié par cristallisation dans l'alcool; il forme des pail lettes incolores fusibles à<B>350</B> et distillant à <B>160</B> sous 8 mm de mercure. Cet éther peut aussi être préparé par éthérification directe de l'acide p-nitrobenzoque avec l'alcool bu tylique normal primaire. Il suffit de faire bouillir le mélange d'une partie d'acide avec cinq parties d'alcool en présence d'acide sul furique concentré. L'éther formé cristallise en refroidissant et peut être séparé par fil tration.
A process for the production of p-aminobenzoic acid n-a-butyl ether. According to Principal Patent No. 90590, the ri-a-butyl ether of p-amino-benzoic acid is prepared by etherification of p-amino-benzoic acid with the primary normal butyl alcohol.
It has been found that p-amirroberizoic acid n-α-butyl ether can also be obtained by etherifying p-nitro-benzoic acid with primary normal butyl alcohol and reducing the obtained ether.
Example: p-nitrobenzoic acid is first converted into p-nitrobenzoyl chloride, then an equicolecular mixture of this p-nitrobenzoyl chloride and normal primary butyl alcohol is heated to boiling until the boiling ceases. hydrochloric acid evolution, and the reaction product is subjected to distillation under reduced pressure. The n-a-butyl ether of p-nitrobenzoic acid thus formed distilled off.
To reduce it to ether-friend, one can have recourse to the well known reduction methods. By reducing, for example, with tin in the presence of hydrochloric acid, the hydrochloride of the ether-amine is obtained. It is purified either by crystallization from extended alcohol or by distillation under reduced pressure.
This new ether thus purified melts at <B> 59 </B> C and distils between 173 C and 174 C under 8 mm of mercury. This ether is very slightly soluble in water; 1 liter of distilled water dissolved at room temperature 13 centigrams.
P-Nitro-benzoic acid ri-a-butyl ether is not yet known. Purified by crystallization from alcohol; it forms colorless straws which fuse at <B> 350 </B> and distill at <B> 160 </B> under 8 mm of mercury. This ether can also be prepared by direct etherification of p-nitrobenzoque acid with primary normal bu tyl alcohol. It suffices to boil the mixture of one part of acid with five parts of alcohol in the presence of concentrated sulphuric acid. The ether formed crystallizes on cooling and can be separated by filtration.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR96144X | 1919-07-30 | ||
CH90590T | 1920-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH96144A true CH96144A (en) | 1922-09-16 |
Family
ID=25704213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH96144D CH96144A (en) | 1919-07-30 | 1920-06-04 | A process for the production of p-aminobenzoic acid n-a-butyl ether. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH96144A (en) |
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1920
- 1920-06-04 CH CH96144D patent/CH96144A/en unknown
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