Diethyl chlorophosphate → 2-Tert-butyl-4-methylphenyl diethyl phosphate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a suspension of NaH (60% in mineral oil, 8.4 g, 0.21 mol) in THF (200 mL) was added dropwise a solution of 2-tert-butyl-4-methylphenol (33 g, 0.20 mol) in THF (100 mL) at 0° C. The mixture was stirred at 0° C. for 15 min and then phosphorochloridic acid diethyl ester (37 g, 0.21 mol) was added dropwise at 0° C. After addition, the mixture was stirred at ambient temperature for 30 min. The reaction was quenched with sat. NH4Cl (300 mL) and then extracted with Et2O (350 mL×2). The combined organic layers were washed with brine, dried over anhydrous Na2SO4, and then evaporated under vacuum to give 2-tert-butyl-4-methylphenyl diethyl phosphate (contaminated with mineral oil) as a colorless oil (60 g, ˜100%), which was used directly in the next step.

Herkunft & Nachweise