AT259552B - Process for the preparation of esters of (2-methyl-5-methoxy-3-indolyl) acetic acid - Google Patents
Process for the preparation of esters of (2-methyl-5-methoxy-3-indolyl) acetic acidInfo
- Publication number
- AT259552B AT259552B AT499366A AT499366A AT259552B AT 259552 B AT259552 B AT 259552B AT 499366 A AT499366 A AT 499366A AT 499366 A AT499366 A AT 499366A AT 259552 B AT259552 B AT 259552B
- Authority
- AT
- Austria
- Prior art keywords
- methyl
- indolyl
- methoxy
- acetic acid
- esters
- Prior art date
Links
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Herstellung von Estern der (2-Methyl-S-methoxy-3-indolyl)-essigsäure
EMI1.1
EMI1.2
<tb>
<tb> -essigsäureNatrium-p-methoxyphenylhydrazinsulfonat <SEP> 37 <SEP> g
<tb> Methylalkohol <SEP> enthaltend <SEP> beispielsweise
<tb> 7 <SEP> Gew. <SEP> -0/0 <SEP> HCI-Gas <SEP> 500 <SEP> cm,
<tb> Lävulinsäure <SEP> 21,5 <SEP> g.
<tb>
EMI1.3
<Desc/Clms Page number 2>
- 800Beispiel 3 : Unter Anwendung der in Beispiel 1 beschriebenen Arbeitsweise und Verwendung von 1000 cms Benzylalkohol an Stelle des Methylalkohol mit einem Gehalt von z. B. 7 Gew. -0/0 HCI-Gas wird 2 h lang auf 100 C erhitzt. Sodann wird weiter, wie in Beispiel 1 beschrieben, gearbeitet und man erhält den Benzylester der (2-Methyl-5-methoxy-3-indolyl)-essigsäure (22 g).
PATENTANSPRÜCHE :
1. Verfahren zur Herstellung von Estern der (2-Methyl-5-methoxy-3-indolyl)-essigsäure, der allgemeinen Formel
EMI2.1
EMI2.2
EMI2.3
zusammen mit Lävulinsäure in wasserfreier Umgebung unter Rühren mit entsprechenden Alkoholen der allgemeinen Formel ROH (R mit obiger Bedeutung) und HCI-Gas behandelt, das so erhaltene Reaktionsgemisch sodann im Vakuum konzentriert und den gebildeten Ester (I) isoliert.
EMI2.4
<Desc / Clms Page number 1>
Process for the preparation of esters of (2-methyl-S-methoxy-3-indolyl) acetic acid
EMI1.1
EMI1.2
<tb>
<tb> -acetic acid sodium p-methoxyphenylhydrazinesulfonate <SEP> 37 <SEP> g
<tb> methyl alcohol <SEP> containing <SEP> for example
<tb> 7 <SEP> weight <SEP> -0/0 <SEP> HCI gas <SEP> 500 <SEP> cm,
<tb> Levulinic acid <SEP> 21.5 <SEP> g.
<tb>
EMI1.3
<Desc / Clms Page number 2>
- 800 Example 3: Using the procedure described in Example 1 and using 1000 cms of benzyl alcohol instead of methyl alcohol with a content of z. B. 7 wt. -0/0 HCl gas is heated to 100 C for 2 hours. The procedure is then continued as described in Example 1 and the benzyl ester of (2-methyl-5-methoxy-3-indolyl) acetic acid (22 g) is obtained.
PATENT CLAIMS:
1. Process for the preparation of esters of (2-methyl-5-methoxy-3-indolyl) -acetic acid, of the general formula
EMI2.1
EMI2.2
EMI2.3
treated together with levulinic acid in an anhydrous environment with stirring with corresponding alcohols of the general formula ROH (R with the above meaning) and HCl gas, the reaction mixture thus obtained is then concentrated in vacuo and the ester (I) formed is isolated.
EMI2.4
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT19766 | 1966-03-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT259552B true AT259552B (en) | 1968-01-25 |
Family
ID=11097955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT499366A AT259552B (en) | 1966-03-09 | 1966-05-26 | Process for the preparation of esters of (2-methyl-5-methoxy-3-indolyl) acetic acid |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT259552B (en) |
-
1966
- 1966-05-26 AT AT499366A patent/AT259552B/en active
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