Triethylamine → 2-[Di(benzyloxy)phosphoryloxy]ethyl 4-nitrophenyl carbonate

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Reaction Steps

4-Nitrophenyl chloroformate (1.01 g; 5.04 mmol) was added at 0° C. under argon atmosphere to a solution of 2-[di(benzyloxy)phosphoryloxy]ethanol (1.62 g; 5.09 mmol) and triethylamine (0.7 ml; 5 mmol) in dichloromethane (20 ml). The mixture was stirred at ambient temperature for 30 minutes, evaporated and purified by flash chromatography, eluting with petroleum ether/ethyl acetate (40/60) to give 2-[di(benzyloxy)phosphoryloxy]ethyl 4-nitrophenyl carbonate.

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