Reaktion #1810799

Reaktionsgleichung

water

2-(2-benzyloxyphenoxy)-5-fluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]nitrobenzene

→

2-(2-benzyloxyphenoxy)-5-fluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]aniline

Ausbeute 79.6%

Lösungsmittel

acetic acid

acetic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigebelow 35° C
2. 2
   workup.ADDITIONAfter the addition
3. 3
   Filtrationthe reaction solution was filtered through celite
4. 4
   workup.ADDITIONdiluted with ethyl acetate
5. 5
   Waschenthe organic layer was washed with saturated aqueous sodium chloride solution
6. 6
   Trocknendried over anhydrous magnesium sulfate
7. 7
   Einengenconcentrated

Vorschrift

To a mixture of 8.6 g of iron powder, 27 ml of acetic acid and 2.7 ml of water was added dropwise a solution of 8.6 g of 2-(2-benzyloxyphenoxy)-5-fluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]nitrobenzene in 23 ml of acetic acid while keeping the temperature of the reaction solution at or below 35° C. After the addition was finished, the stirring was continued for 2 hours and then the reaction solution was filtered through celite and diluted with ethyl acetate. The mixture was neutralized with saturated aqueous sodium hydrogen carbonate solution and the organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate and concentrated. The obtained residue was subjected to silica-gel column chromatography to give 6.46 g of 2-(2-benzyloxyphenoxy)-5-fluoro-4-[3-methyl-2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyrimidin-1-yl]aniline.

Quelle