Reaktion #797990

Reaktionsgleichung

8-Chloro-2-methyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

potassium hydroxide

2-(2-Bromo-ethyl)pyridine

→

desired compound

Ausbeute 7.1%

8-Chloro-2-methyl-5-(2-pyrrol-1-yl-ethyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

Ausbeute 7.1%

Lösungsmittel

N-methyl 2-pyrolidone

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturheated at 100 deg C
2. 2
   SonstigeReaction mixture
3. 3
   Extraktionextracted with ethyl acetate (3×50 mL), Organic layer
4. 4
   Trocknenwas dried over anhydrous sodium sulfate
5. 5
   Einengenconcentrated under reduced pressure
6. 6
   Sonstigeevaporator
7. 7
   SonstigeThe crude was purified through column chromatography (4% MeOH:DCM in silica 100-200 mesh, Diameter of column—2.5 cm, Height of silica—approx. 5 inch)

Vorschrift

8-Chloro-2-methyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (0.1 g, 0.45 mmol) was dissolved in N-methyl 2-pyrolidone (3.0 mL). Powdered potassium hydroxide (0.224 g, 4 mmol) was added and heated at 100 deg C. for 3 h. 2-(2-Bromo-ethyl)pyridine (0.09 g, 0.51 mol) was added at the same temperature and stir for 3 h at RT Reaction mixture was diluted with water (30 mL) and extracted with ethyl acetate (3×50 mL), Organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure using rotary evaporator. The crude was purified through column chromatography (4% MeOH:DCM in silica 100-200 mesh, Diameter of column—2.5 cm, Height of silica—approx. 5 inch) to provide the desired compound as light yellow oil (0.01 g, 7% yield). 8-Chloro-2-methyl-5-(2-pyrrol-1-yl-ethyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (0.010 g, 0.0319 mmol) was dissolved in THF (0.5 mL), A solution of oxalic acid dihydrate (0.004 g, 0.0319 mol) in THF (0.5 mL) was added and stirred for 30 min at RT. The precipitate was filtered and dried to give oxalate salt as white solid (0.01 g, 78% yield).

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