DE1119871B - Process for the isolation of L-proline, L-oxyproline and L-arginine from gelatin hydrolyzate - Google Patents
Process for the isolation of L-proline, L-oxyproline and L-arginine from gelatin hydrolyzateInfo
- Publication number
- DE1119871B DE1119871B DEV18662A DEV0018662A DE1119871B DE 1119871 B DE1119871 B DE 1119871B DE V18662 A DEV18662 A DE V18662A DE V0018662 A DEV0018662 A DE V0018662A DE 1119871 B DE1119871 B DE 1119871B
- Authority
- DE
- Germany
- Prior art keywords
- oxyproline
- proline
- arginine
- ethanol
- isolation
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D207/04—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D207/10—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D207/16—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pyrrole Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Verfahren zur Isolierung von L-Prolin, L-Oxyprolin und L-Arginin aus Gelatine-Hydrolysat Zusatz zur Patentanmeldung V 18663 IVb /12 q (Auslegeschrift 1 114 822) In der Patentanmeldung V 18663 IVb/12q wird ein Verfahren zur Isolierung von L-Prolin, L-Oxyprolin und L-Arginin aus Gelatine-Hydrolysat beschrieben, bei dem man ein durch Hydrolyse von Gelatine erhaltenes Aminosäuregemisch erst mit Methanol und dann den nach dem Abdestillieren des Methanols verbleibenden Rückstand mit Äthanol behandelt, wodurch die im ursprünglichen Gemisch vorhandenen Aminosäuren sich trennen lassen. Die Isolierung des L-Prolins und des L-Oxyprolins gelingt auf diese Weise bequem. Das L-Arginin jedoch ist nur zum Teil in der durch Methanol bewirkten Fällung enthalten, während der Rest des L-Arginins sich im Methanol löst und aus der das L-Oxyprolin enthaltenden Fraktion gesondert als Flavianat isoliert werden muß.Process for the isolation of L-proline, L-oxyproline and L-arginine from Gelatine hydrolyzate addendum to patent application V 18663 IVb / 12 q (Auslegeschrift 1 114 822) In the patent application V 18663 IVb / 12q a method for isolation of L-proline, L-oxyproline and L-arginine from gelatin hydrolyzate described in an amino acid mixture obtained by hydrolysis of gelatin is first mixed with methanol and then the residue remaining after the methanol has been distilled off with ethanol treated, causing the amino acids present in the original mixture to separate permit. L-proline and L-oxyproline are isolated in this way comfortable. The L-arginine, however, is only partly in the precipitation caused by methanol while the rest of the L-arginine dissolves in the methanol and from which the L-oxyproline-containing fraction must be isolated separately as flavianate.
Es wurde nun gefunden, daß es vorteilhafter ist, zuerst das L-Arginin in an sich bekannter Weise aus dem wäßrigen Hydrolysat als Flavianat vollständig auszufällen und dann, nach Einengen des Filtrats, die in der Patentanmeldung V 18663 IVb,12q bereits beschriebene Isolierung des L-Prolins und des L-Oxyprolins mit Methanol und Äthanol vorzunehmen. It has now been found that it is more advantageous to use the L-arginine first in a manner known per se from the aqueous hydrolyzate completely as flavianate to precipitate and then, after concentrating the filtrate, which is described in patent application V 18663 IVb, 12q already described isolation of L-proline and L-oxyproline with methanol and ethanol.
Wenn man in dieser Weise verfährt, wird das Verfahren nach der Patentanmeldung V 18663 IVb/12q noch weiter vereinfacht. If one proceeds in this way, the procedure according to the patent application becomes V 18663 IVb / 12q even further simplified.
Beispiel 3 kg Gelatine werden mit 2,25 1 konz. Schwefelsäure und 4,5 1 Wasser 24 Stunden gekocht. Dann verdünnt man die entstandene Lösung mit Wasser, entfernt die Schwefelsäure mit Bariumhydroxyd oder mit Calciumhydroxyd, behandelt mit Kohle und fällt aus dem Filtrat, eventuell nachdem man die Lösung eingeengt hat, das L-Arginin mit der gerade ausreichenden Menge Flaviansäure (= 2 4-Dinitro-naphthal-(l)-sulfon säure-(7)). Nach dem Absaugen des Flavianates engt man das Filtrat bis auf einen Rückstand von etwa 3,52kg ein und setzt 11,51 Methanol hinzu, wobei ein Niederschlag entsteht, der zum größten Teil aus Glykokoll besteht. Die methylalkoholische Lösung wird bis auf etwa 1,4 kg eingedampft und zu diesem Rückstand 101 Äthanol gegeben, kurze Zeit auf 60°C erhitzt und über Nacht bei Zimmertemperatur stehengelassen. Es wird so ein Niederschlag erhalten, der das L-Oxyprolin enthält, während das L-Prolin im Äthanol gelöst bleibt. Die äthylalkoholische Lösung wird vom Niederschlag getrennt, nach dem Abdestillieren des Äthanols der glasige Rückstand in Wasser gelöst und durch Zusatz der entsprechenden Menge Pikrinsäure das L-Prolin als Pikrat abgeschieden. Der Niederschlag, der das L-Oxyprolin enthält, wird in wenig Wasser gelöst, eventuell der anhaftende Alkohol durch Erhitzen entfernt und durch Zusatz von Pikrinsäure das L-Oxyprolin als Pikrat isoliert. Example 3 kg of gelatin are concentrated with 2.25 l. Sulfuric acid and 4.5 l of water boiled for 24 hours. Then the resulting solution is diluted with water, removes the sulfuric acid with barium hydroxide or with calcium hydroxide with charcoal and falls out of the filtrate, possibly after the solution has been concentrated has L-arginine with just enough flavic acid (= 2 4-dinitro-naphthal- (l) -sulfone acid- (7)). After the flavianate has been filtered off with suction, the filtrate is concentrated down to one A residue of about 3.52 kg and 11.5 l of methanol are added, with a precipitate which consists for the most part of glycocolla. The methyl alcoholic solution is evaporated to about 1.4 kg and 101 ethanol is added to this residue, briefly heated to 60 ° C and left to stand overnight at room temperature. A precipitate is thus obtained which contains the L-oxyproline while the L-proline Remains dissolved in the ethanol. The ethyl alcoholic solution is separated from the precipitate, after the ethanol has been distilled off, the glassy residue is dissolved in water and by adding the appropriate amount of picric acid, the L-proline is deposited as picrate. The precipitate, which contains the L-oxyproline, is dissolved in a little water, possibly the adhering alcohol is removed by heating and by adding picric acid the L-oxyproline isolated as a picrate.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV18662A DE1119871B (en) | 1960-05-20 | 1960-05-20 | Process for the isolation of L-proline, L-oxyproline and L-arginine from gelatin hydrolyzate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV18662A DE1119871B (en) | 1960-05-20 | 1960-05-20 | Process for the isolation of L-proline, L-oxyproline and L-arginine from gelatin hydrolyzate |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1119871B true DE1119871B (en) | 1961-12-21 |
Family
ID=7577269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV18662A Pending DE1119871B (en) | 1960-05-20 | 1960-05-20 | Process for the isolation of L-proline, L-oxyproline and L-arginine from gelatin hydrolyzate |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1119871B (en) |
-
1960
- 1960-05-20 DE DEV18662A patent/DE1119871B/en active Pending
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