Reaktion #53790

Reaktionsgleichung

diethyl 4-aminobenzylphosphonate

sodium bicarbonate

water

Thiophosgene

→

isothiocyanate

Diethyl 4-isothiocyanatobenzylphosphonate

Lösungsmittel

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe organic and aqueous layers were separated
2. 2
   Trocknenthe organic layer dried over magnesium sulfate
3. 3
   Filtrationfiltered
4. 4
   Einengenconcentrated

Vorschrift

Thiophosgene (4.1 mL, 54 mmol) was added al at once to a mixture of diethyl 4-aminobenzylphosphonate (12.04 g, 50 mmol), sodium bicarbonate (8.33 g, 99 mmol), water (100 mL), and dichloromethane (250 mL), and the mixture was stirred at room temperature for about 2 hours. The organic and aqueous layers were separated, the organic layer dried over magnesium sulfate, filtered, and concentrated to give the product isothiocyanate as a brown oil. This was used directly in the next step.

Quelle