Reaktion #62077

Reaktionsgleichung

2-(4-Hydroxy-thianthren-1-yl)-6-morpholin-4-yl-pyran-4-one

2-(4-Hydroxy-thianthren-1-yl) -6-morpholin-4-yl-pyran-4-one

potassium carbonate

methylbromoacetate

water

→

title compound

[4-(6-Morpholin-4-yl-4-oxo-4H-pyran-2-yl)-thianthren-1-yloxy]-acetic acid methyl ester

Lösungsmittel

dimethylformamide

Reaktionsbedingungen

Aufarbeitung

1. 1
   ExtraktionThe mixture was then extracted
2. 2
   TrocknenThe combined organics were dried (MgSO4)
3. 3
   Filtrationfiltered
4. 4
   Einengenconcentrated in vacuo

Vorschrift

To a solution of 2-(4-Hydroxy-thianthren-1-yl)-6-morpholin-4-yl-pyran-4-one (130) (1.20 g, 2.91 mmol) in dimethylformamide (10 ml), under and inert atmosphere, was added powdered potassium carbonate (1.21 g, 8.75 mmol) and methylbromoacetate (0.55 ml, 5.82 mmol). The temperature of the reaction was raised to 60° C. for 48 hours and then cooled to room temperature before the addition of water (20 mL). The mixture was then extracted using ethyl acetate (3×30 ml). The combined organics were dried (MgSO4), filtered and concentrated in vacuo to give the title compound as an off white solid (1.40 g, 99%) that was suitably clan and required no further purification. m/z (LC-MS, ESP): RT=4.48 min, (M++1)=484

Quelle