AT246746B - Process for the preparation of an L-lyxopyranosyl halide - Google Patents

Process for the preparation of an L-lyxopyranosyl halide

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Publication number
AT246746B
AT246746B AT433762A AT433762A AT246746B AT 246746 B AT246746 B AT 246746B AT 433762 A AT433762 A AT 433762A AT 433762 A AT433762 A AT 433762A AT 246746 B AT246746 B AT 246746B
Authority
AT
Austria
Prior art keywords
halide
lyxopyranosyl
preparation
methyl
cyclocarbonato
Prior art date
Application number
AT433762A
Other languages
German (de)
Original Assignee
Hoffmann La Roche
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 Hoffmann La Roche filed Critical Hoffmann La Roche
Application granted granted Critical
Publication of AT246746B publication Critical patent/AT246746B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Herstellung eines L-Lyxopyranosylhalogenids 
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines L-Lyxopyranosylhalogenids der allgemeinen Formel 
 EMI1.1 
 
 EMI1.2 
 

 <Desc/Clms Page number 2> 

 eingeengt. Zurück bleibt ein benzollösliches Öl, welches an 50 g Silicagel chromatographiert wird. Die mit Benzol und Benzol/Äther (95 : 5) eluierten Fraktionen kristallisieren aus Äther/Methanol und stellen 
 EMI2.1 
   (5, 5-Dimethyl-4-0-methyl-2, 3-cyclocarbonato-L-lyxopyranosyloxy)-8-methyl-PATENTANSPRÜCHE :    1.

   Verfahren zur Herstellung eines L-Lyxopyranosylhalogenids der allgemeinen Formel 
 EMI2.2 
 in der die Substituenten R Alkylgruppen mit 1-4 Kohlenstoffatomen darstellen und Hal ein Halogenatom bezeichnet, dadurch gekennzeichnet, dass man ein   5, 5-Dialkyl-4-0-alkyl-2, 3-cyclocarbonato-alkyl-   L-lyxopyranosid mit Halogenwasserstoff in Nitromethan behandelt.



   <Desc / Clms Page number 1>
 



  Process for the preparation of an L-lyxopyranosyl halide
The present invention relates to a process for the preparation of an L-lyxopyranosyl halide of the general formula
 EMI1.1
 
 EMI1.2
 

 <Desc / Clms Page number 2>

 constricted. What remains is a benzene-soluble oil which is chromatographed on 50 g of silica gel. The fractions eluted with benzene and benzene / ether (95: 5) crystallize from ether / methanol and provide
 EMI2.1
   (5,5-Dimethyl-4-0-methyl-2, 3-cyclocarbonato-L-lyxopyranosyloxy) -8-methyl-PATENT CLAIMS: 1.

   Process for the preparation of an L-lyxopyranosyl halide of the general formula
 EMI2.2
 in which the substituents R represent alkyl groups with 1-4 carbon atoms and Hal denotes a halogen atom, characterized in that a 5, 5-dialkyl-4-0-alkyl-2, 3-cyclocarbonato-alkyl-L-lyxopyranoside with hydrogen halide in Nitromethane treated.

Claims (1)

2. Verfahren nach Anspruch l, dadurch gekennzeichnet, dass man als Ausgangsverbindung das 5,5-Dimethyl-4-O-methyl-2,3-cyclocarbonato-methyl-L-lyxopyranosid einsetzt. 2. The method according to claim l, characterized in that the 5,5-dimethyl-4-O-methyl-2,3-cyclocarbonato-methyl-L-lyxopyranoside is used as the starting compound.
AT433762A 1960-11-07 1961-10-31 Process for the preparation of an L-lyxopyranosyl halide AT246746B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH246746X 1960-11-07

Publications (1)

Publication Number Publication Date
AT246746B true AT246746B (en) 1966-05-10

Family

ID=4465745

Family Applications (1)

Application Number Title Priority Date Filing Date
AT433762A AT246746B (en) 1960-11-07 1961-10-31 Process for the preparation of an L-lyxopyranosyl halide

Country Status (1)

Country Link
AT (1) AT246746B (en)

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