Reaktion #5979

Reaktionsgleichung

sodium

methyl 1-acetylamino-2-chloro-5a,6,7,8,9,9a-hexahydrodibenzofuran-4-carboxylate

→

1-amino-2-chloro-5a,6,7,8,9,9a-hexahydrodibenzofuran-4-carboxylic acid

Lösungsmittel

sodium hydroxide

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGstirring
2. 2
   workup.WAITcontinued at 60° C. overnight
3. 3
   SonstigeThe methanol is removed in vacuum
4. 4
   workup.ADDITIONdiluted with water
5. 5
   Filtrationfiltered
6. 6
   Filtrationfiltered
7. 7
   Extraktionextracted with ethyl acetate
8. 8
   Waschenwashed with water
9. 9
   Trocknendried over magnesium sulfate
10. 10
    Sonstigeevaporated to dryness

Vorschrift

To a solution of 0.3 g of sodium in 15 ml methanol is added 0.6 g of methyl 1-acetylamino-2-chloro-5a,6,7,8,9,9a-hexahydrodibenzofuran-4-carboxylate. Stirring is continued at 60° C. for two days. This is then diluted with 5 ml 1N sodium hydroxide and stirring continued at 60° C. overnight. The methanol is removed in vacuum, diluted with water, filtered, acidified with acetic acid, filtered, extracted with ethyl acetate, washed with water, dried over magnesium sulfate and evaporated to dryness to obtain 1-amino-2-chloro-5a,6,7,8,9,9a-hexahydrodibenzofuran-4-carboxylic acid. This is purified by crystallization from ethyl acetate/ether.

Quelle