CH262800A - Process for the preparation of a new pyrimidyl mercaptocarboxylic acid. - Google Patents
Process for the preparation of a new pyrimidyl mercaptocarboxylic acid.Info
- Publication number
- CH262800A CH262800A CH262800DA CH262800A CH 262800 A CH262800 A CH 262800A CH 262800D A CH262800D A CH 262800DA CH 262800 A CH262800 A CH 262800A
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- pyrimidyl
- new
- preparation
- mercaptocarboxylic acid
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung einer neuen Pyrimidylmercaptocarbonsäure. Das vorliegende Patent betrifft ein Ver fahren zur Herstellung einer neuen Pyrimi- dylmercaptocarbonsäure, welches dadurch ge kennzeichnet ist., dass man eine Monohalogen essigsäure, wie die Monochloressigsäure, mit Thioharnstoff und einer Verbindung der Formel
EMI0001.0007
worin COOR eine veresterte Carboxylgruppe bedeutet, umsetzt.
Die so erhaltene 4-Oxy-6-n-propyl-pyrimi- dyl-(2)-mercaptoessigsäure schmilzt bei 1520. Sie soll als Heilmittel oder als Zwischenpro dukt Verwendung finden.
Bei der Umsetzung arbeitet. man zweck mässig in Gegenwart. eines Verdünnungsmit tels, wie Wasser, oder eines organischen Lö sungsmittels, beispielsweise Methy 1- oder Äthylalkohol oder Aceton, wobei vorteilhaf- terweise ein säurebindendes Mittel zugesetzt wird.
Von der erhaltenen neuen Säure lassen sich Salze gewinnen, wobei sowohl anorga nische wie organische Basen als salzbildende Mittel zur Anwendung gelangen können. Von besonderem Interesse sind die Natrium- und Ammoniumsalze wegen ihrer leichten Löslich keit, ferner auch die Calciumsalze. Zur Salz bildung können auch physiologisch aktive or ganische Basen verwendet werden, beispiels weise das für seine antithyreotische Wirkung bekannte 2-Amino-thiazol. <I>Beispiel:
</I> In das Reaktionsgemisch von 15,2 Ge wichtsteilen Thioharnstoff, 19 Gewichtsteilen Chloressigsäure, 32 Gewichtsteilen n-Butyryl- essigester, 22 Volumteilen 9-n-Natronlauge und 200 Volumteilen Wasser werden unter kräftigem Rühren 44 Volumteile 9-n-Natron- lauge langsam zugetropft, so dass die Tem peratur auf etwa 300 steigt.
Hierauf lässt man 2 Stunden bei Zimmertemperatur stehen und neutralisiert mit etwa 6-n-Salzsäure. Nach 12- stündigem Stehen wird von einem Nebenpro dukt abgesaugt und aus dem Filtrat die 4- Oxy - 6-n-propyl-pyrimidyl- (2) - mercaptoessig- säure mit Salzsäure gefällt. Sie schmilzt bei 1520.
Process for the preparation of a new pyrimidyl mercaptocarboxylic acid. The present patent relates to a process for the production of a new pyrimidylmercaptocarboxylic acid, which is characterized in that a monohaloacetic acid, such as monochloroacetic acid, with thiourea and a compound of the formula
EMI0001.0007
wherein COOR means an esterified carboxyl group, is converted.
The 4-oxy-6-n-propyl-pyrimidyl- (2) -mercaptoacetic acid thus obtained melts at 1520. It is said to be used as a remedy or as an intermediate product.
Works in the implementation. one expediently in the presence. a diluent, such as water, or an organic solvent, for example methyl or ethyl alcohol or acetone, an acid-binding agent advantageously being added.
Salts can be obtained from the new acid obtained, and both inorganic and organic bases can be used as salt-forming agents. The sodium and ammonium salts are of particular interest because of their easy solubility, as are the calcium salts. Physiologically active organic bases can also be used for salt formation, for example 2-amino-thiazole, which is known for its antithyroid activity. <I> example:
</I> In the reaction mixture of 15.2 parts by weight of thiourea, 19 parts by weight of chloroacetic acid, 32 parts by weight of n-butyryl acetic ester, 22 parts by volume of 9N sodium hydroxide solution and 200 parts by volume of water, 44 parts by volume of 9N sodium hydroxide solution are added with vigorous stirring. Lye slowly added dropwise so that the temperature rises to about 300.
It is then left to stand for 2 hours at room temperature and neutralized with about 6N hydrochloric acid. After standing for 12 hours, a byproduct is filtered off with suction and the 4-oxy-6-n-propyl-pyrimidyl- (2) -mercaptoacetic acid is precipitated from the filtrate with hydrochloric acid. It melts at 1520.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH262800T | 1946-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH262800A true CH262800A (en) | 1949-07-31 |
Family
ID=4474539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH262800D CH262800A (en) | 1946-12-09 | 1946-12-09 | Process for the preparation of a new pyrimidyl mercaptocarboxylic acid. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH262800A (en) |
-
1946
- 1946-12-09 CH CH262800D patent/CH262800A/en unknown
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