Reaktion #80446

Reaktionsgleichung

NaHCO3

3-picolyl chloride hydrochloride

triethylphosphite

→

diethyl 3-pyridylmethylphosphonate

Ausbeute 26.2%

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionthe mixture was extracted with CH2Cl2
2. 2
   TrocknenThe organic phase was dried (MgSO4)
3. 3
   Einengenconcentrated in vacuo
4. 4
   TemperaturThe mixture was cooled
5. 5
   Sonstigepurified by flash column chromotography on silica gel eluting with 5% MeOH

Vorschrift

To a stirred solution of saturated NaHCO3 was added 3-picolyl chloride hydrochloride (8.2 g, 50 mmol). After gas evolution ended, the mixture was extracted with CH2Cl2. The organic phase was dried (MgSO4) and concentrated in vacuo. To the resulting residue was added triethylphosphite (8.3 g, 50 mmol) and the neat mixture was stirred and heated at 85° C. overnight. The mixture was cooled and purified by flash column chromotography on silica gel eluting with 5% MeOH--CH2Cl2 to afford 3.0 g of diethyl 3-pyridylmethylphosphonate as a yellow oil.

Quelle