Reaktion #45929

Reaktionsgleichung

4-hydroxybenzaldehyde

Cs2CO3

mesylate

3-diethylamino-1-propanol

methanesulfonyl chloride

→

4-(3-diethylaminopropoxy)benzaldehyde

Lösungsmittel

DMSO

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwas added to the reaction mixture
2. 2
   TemperaturAfter cooling to rt
3. 3
   Sonstigethe reaction was quenched by cold H2O (100 mL)
4. 4
   Extraktionthe resulting mixture was extracted with EtOAc (3×100 mL)
5. 5
   WaschenThe combined EtOAc extracts were washed with brine (3×50 mL)
6. 6
   Trocknendried (anhydrous Na2SO4)
7. 7
   SonstigeThe solvent was removed in vacuo
8. 8
   Sonstigethe crude product was purified by silica gel column chromatography (eluting with 10% MeOH in DCM+0.5% Et3N)

Vorschrift

To a stirred solution of 4-hydroxybenzaldehyde (20 mmol) in DMSO (80 mL) at rt, solid Cs2CO3 (50 mmol) was added. The mesylate prepared from 3-diethylamino-1-propanol and methanesulfonyl chloride, General Procedure P2 (30 mmol) was added to the reaction mixture and heated to 90° C. until the reaction was complete. After cooling to rt, the reaction was quenched by cold H2O (100 mL), and the resulting mixture was extracted with EtOAc (3×100 mL). The combined EtOAc extracts were washed with brine (3×50 mL) and dried (anhydrous Na2SO4). The solvent was removed in vacuo, and the crude product was purified by silica gel column chromatography (eluting with 10% MeOH in DCM+0.5% Et3N) to afford 4-(3-diethylaminopropoxy)benzaldehyde.

Quelle