[go: up one dir, main page]

DE1149702B - Process for the production of dextran phosphate - Google Patents

Process for the production of dextran phosphate

Info

Publication number
DE1149702B
DE1149702B DEV17943A DEV0017943A DE1149702B DE 1149702 B DE1149702 B DE 1149702B DE V17943 A DEV17943 A DE V17943A DE V0017943 A DEV0017943 A DE V0017943A DE 1149702 B DE1149702 B DE 1149702B
Authority
DE
Germany
Prior art keywords
dextran
production
dextran phosphate
solution
pyridine
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
Application number
DEV17943A
Other languages
German (de)
Inventor
Dr Ulrich Behrens
Anton Gabert
Dr Manfred Ringpfeil
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BERNBURG SERUM WERK VEB
Original Assignee
BERNBURG SERUM WERK VEB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BERNBURG SERUM WERK VEB filed Critical BERNBURG SERUM WERK VEB
Priority to DEV17943A priority Critical patent/DE1149702B/en
Publication of DE1149702B publication Critical patent/DE1149702B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/0006Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
    • C08B37/0009Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; (alpha-1,4)(alpha-1,6)-D-Glucans; (alpha-1,3)(alpha-1,4)-D-Glucans, e.g. isolichenan or nigeran; (alpha-1,4)-D-Glucans; (alpha-1,3)-D-Glucans, e.g. pseudonigeran; Derivatives thereof
    • C08B37/0021Dextran, i.e. (alpha-1,4)-D-glucan; Derivatives thereof, e.g. Sephadex, i.e. crosslinked dextran

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

Verfahren zur Herstellung von Dextranphosphat Die Erfindung hat die Herstellung des Phosphorsäureesters des Dextrans zum Ziel. Anorganische Ester des Dextrans, so auch der Phosphorsäureester, sind in letzter Zeit beschrieben worden. Allgemein werden diese Verbindungen durch Umsetzung im wasserfreien Pyridin als Kondensationsmittel bei sehr tiefen Temperaturen (-20 bis 00 C) erhalten. Die Herstellung anorganischer Ester auf diese Weise wird sowohl durch das Einhalten tiefer Temperaturen als auch durch das Arbeiten mit Pyridin erschwert, besonders bei technologischer Anwendung.Process for the preparation of dextran phosphate The invention has that Production of the phosphoric acid ester of dextran to the goal. Inorganic esters of Dextrans, as well as the phosphoric acid ester, have recently been described. In general, these compounds are converted into anhydrous pyridine as Condensation agent obtained at very low temperatures (-20 to 00 C). The production Inorganic ester in this way is produced both by maintaining low temperatures as well as being made more difficult by working with pyridine, especially with technological ones Use.

Für die Darstellung des Phosphorsäureesters des Dextrans wurde bisher nur eine Herstellungsweise beschrieben: Gereinigtes, aktiviertes und getrocknetes, gegebenenfalls auch abgebautes Dextran wird in wasserfreiem Pyridin bei Temperaturen von - 22 bis 0° C - mit überschüssigem POCl3 oder mit einem Gemisch von P2O5 + H3PO4 versetzt. Die Veresterung wird dann bei Temperaturen bis +400 C durchgeführt. For the representation of the phosphoric acid ester of dextran has been up to now only one production method described: cleaned, activated and dried, Dextran which has also been degraded is optionally also dissolved in anhydrous pyridine at temperatures from - 22 to 0 ° C - with excess POCl3 or with a mixture of P2O5 + H3PO4 offset. The esterification is then carried out at temperatures up to +400 C.

Für diese Darstellungsweise gelten die obenerwähnten Erschwernisse. The difficulties mentioned above apply to this type of representation.

Das erfindungsgemäße Verfahren vermeidet diese Nachteile dadurch, daß als alkalisches Kondensationsmittel wäßrige Laugen benutzt werden. Dadurch kann bei Temperaturen über 0° C gearbeitet werden. Eine Belästigung, wie sie durch Pyridin auftritt, fällt fort. The method according to the invention avoids these disadvantages by that aqueous bases are used as the alkaline condensing agent. This can work at temperatures above 0 ° C. A nuisance such as that caused by pyridine occurs, falls away.

Besonders konstruierte Vorrichtungen, wie sie das Arbeiten mit Pyridin erfordern, sind nicht nötig. D;adurch, daß Dextran in wäßriger Lösung umgesetzt wird, erübrigt sich ein Ausfällen und Trocknen. Specially designed devices like those working with pyridine require are not necessary. D; adby that dextran reacted in aqueous solution there is no need for precipitation and drying.

Ebenso entfällt die Aufbereitung des Pyridins und des Dextrans zu wasserfreien Produkten. The preparation of the pyridine and dextran is also omitted anhydrous products.

Durch die Synthese des Phosphorsäureesters aus Dextran in wäßrig alkalischer Lösung, bevorzugt nitron- oder kali alkalisch, durch Zusatz von POS1. bei Temperaturen um +100 C läßt sich auf einfachem Wege Dextranphosphat herstellen. Through the synthesis of the phosphoric acid ester from dextran in aqueous alkaline solution, preferably nitrate or potassium alkaline, by adding POS1. At temperatures around +100 C, dextran phosphate can be produced in a simple way.

Zur Umsetzung sind Dextrane von beliebigem Molekulargewicht, niedermolekulare von z. B. 19000 wie auch hochmolekulare, native, geeignet. Dextrans of any molecular weight, low molecular weight, are used for implementation from Z. B. 19000 as well as high molecular weight, native, suitable.

Dextranphosphorsäureester finden therapeutische Anwendung oder stellen Zwischenprodukte für weitere Umsetzungen, wie Umesterungen usw. dar. Dextran phosphoric acid esters are used or provided therapeutically Intermediate products for further reactions, such as transesterifications, etc.

Außerdem kann das Produkt infolge seiner sirupösen Konsistenz technische Anwendung finden. Also, due to its syrupy consistency, the product can be technical Find application.

Beispiel 1 100 g Dextran (Molekulargewicht 30 000) werden in 375 ml 400/oiger Natronlauge gelöst. Man kühlt die Lösung auf etwa + 50 C und läßt eine Lösung von 230 g Phosphoroxychlorid in 100 ml n-Hexan unter kräftigem Rühren zutropfen. Das Zutropfen hat so zu erfolgen, daß die Temperatur des Reaktionsgemisches nicht über +10° C steigt. Im Laufe der Reaktion erstarrt die Lösung zu einer gallertartigen Masse. Man läßt stehen und fällt dann mit Methanol. Das Produkt wird durch Umfällen mit Methanol gereinigt. Ausbeute: 160 g. Example 1 100 g of dextran (molecular weight 30,000) are used in 375 ml of 400% sodium hydroxide solution dissolved. The solution is cooled to about + 50 ° C. and left one solution of 230 g of phosphorus oxychloride in 100 ml of n-hexane are added dropwise with vigorous stirring. The dropwise addition has to be done in such a way that the temperature of the reaction mixture does not rises above + 10 ° C. In the course of the reaction, the solution solidifies into a gelatinous one Dimensions. It is left to stand and then precipitated with methanol. The product is accidentally dropped cleaned with methanol. Yield: 160 g.

Beispiel 2 100 g Dextran (Molekulargewicht 13 000) werden in 375 ml 400/oiger Natronlauge gelöst. Man kühlt die Lösung auf etwa + 50 C und läßt eine Lösung von 230 g Phosphoroxychlorid in 100 ml n-Hexan unter kräftigem Rühren zutropfen. Das Zutropfen erfolgt so, daß die Temperatur des Reaktionsgemisches nicht über + 200 C steigt. Das Reaktionsgemisch wird im Laufe der Reaktion viskoser und verfestigt sich beim Stehen über Nacht zu einer Gallerte. Das Produkt wird mit Methanol ausgefällt und durch Umfällen mit Methanol gereinigt. Ausbeute: 115 g. Example 2 100 g of dextran (molecular weight 13,000) are used in 375 ml of 400% sodium hydroxide solution dissolved. The solution is cooled to about + 50 ° C. and left one Add dropwise a solution of 230 g of phosphorus oxychloride in 100 ml of n-hexane with vigorous stirring. The dropwise addition takes place in such a way that the temperature of the reaction mixture does not exceed + 200 C rises. The reaction mixture becomes more viscous and solidified in the course of the reaction forms a jelly when standing overnight. The product is precipitated with methanol and purified by reprecipitation with methanol. Yield: 115 g.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Dextranphosphat durch Veresterung von Dextranen mit Phosphoroxychlorid in Gegenwart eines Chlorwasserstoff bindenden Mittels, dadurch gekennB zeichnet, daß man als Chlorwasserstoff bindendes Mittel wäßriges Alkali bei Temperaturen über 00 C, bevorzugt um 100 C, verwendet. PATENT CLAIM: Process for the production of dextran phosphate by Esterification of dextrans with phosphorus oxychloride in the presence of a hydrogen chloride binding agent, characterized in that it is a binding agent as hydrogen chloride Medium aqueous alkali at temperatures above 00 ° C., preferably around 100 ° C., is used. In Betracht gezogene Druckschriften: Deutsche Auslegeschrift Nr. 1040 013. Documents considered: German Auslegeschrift No. 1040 013.
DEV17943A 1960-01-21 1960-01-21 Process for the production of dextran phosphate Pending DE1149702B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV17943A DE1149702B (en) 1960-01-21 1960-01-21 Process for the production of dextran phosphate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV17943A DE1149702B (en) 1960-01-21 1960-01-21 Process for the production of dextran phosphate

Publications (1)

Publication Number Publication Date
DE1149702B true DE1149702B (en) 1963-06-06

Family

ID=7576730

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV17943A Pending DE1149702B (en) 1960-01-21 1960-01-21 Process for the production of dextran phosphate

Country Status (1)

Country Link
DE (1) DE1149702B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040013B (en) * 1955-07-20 1958-10-02 Farmaceutici Italia Process for the preparation of sodium salts of dextran-phosphoric acid esters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040013B (en) * 1955-07-20 1958-10-02 Farmaceutici Italia Process for the preparation of sodium salts of dextran-phosphoric acid esters

Similar Documents

Publication Publication Date Title
DE1258100B (en) Process for phosphorylating polymeric substances containing hydroxyl groups
DE1149702B (en) Process for the production of dextran phosphate
DE927873C (en) Process for the preparation of sodium cyclopentadiene, sodium alkyl and sodium benzyl cyclopentadienes
DE575750C (en) Process for the production of polyglycides
DE1025140B (en) Process for the production of high molecular weight polymerisation products
DE1958125C3 (en) Process for the preparation of an oxazaphospholanyl-phosphonic acid
DE531276C (en) Process for the production of esters of carbohydrates, in particular cellulose, with organic acids
DE940680C (en) Process for the production of polyvinyl esters from polyvinyl compounds containing hydroxyl groups and diketene
DE509265C (en) Process for the production of molecular compounds from sodium iodine and urea
DE68913040T2 (en) METHOD OF PRODUCING ACYRIC ACID ARYL ESTERS.
DE664309C (en) Process for the preparation of amides of higher molecular weight carboxylic acids
DE830955C (en) Process for the production of stable trinitroalkanolamine salts
EP0107132B1 (en) Process for preparing 1-hydroxy-alkane-1-phosphonic acids
DE661720C (en) Process for the conversion of warfare agents like ª ‰ ª ‰ -Dichlorodiaethylsulfids into harmless compounds
DE966124C (en) Process for the production of resinous condensation products from melamine
DE1518348C3 (en)
DE519877C (en) Process for the acetylation of cellulose
SU477579A3 (en) The method of obtaining the composition used, for example, for coatings or as a binder
AT263814B (en) Process for the production of a new poly-γ-propylsulfonic acid ether of inulin
DE719830C (en) Process for the production of salts of higher molecular phosphatidic acids
DE954285C (en) Process for the production of stable and largely water-soluble fumagillin products
AT330202B (en) PROCESS FOR PREPARING A NEW AMINE SALT
DE2060216C3 (en) Process for the preparation of dialkylhydroxymethylphosphine oxides
DE932125C (en) Process for the rearrangement of naphthalic acid into naphthalene-2,6-dicarboxylic acid
AT273967B (en) Process for the preparation of new salts of substituted s-triazines