3-diethoxyphosphorylprop-1-enylbenzene

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Lithium bis(trimethylsilyl)amide (1M sol. in THF, 2.63 mL, 2.63 mmol) was added at −60° C. under nitrogen atmosphere to a solution of diethyl cinnamylphosphonate (0.629 mL, 2.64 mmol). After 15 min. under stirring at the same temperature, N-Boc-4-piperidone (500 mg, 2.51 mmol) dissolved in THF (5 ml) was added. Stirring and cooling was maintained for 30 min and, after 2 h, the reaction mixture was quenched with water and with EtOAc. The combined extracts were washed, dried over Na2SO4 and evaporated to dryness affording the title product (752 mg), that was used in the next step without further purification. was added cooling was maintained for 30 min and, after 2 h the reaction mixture was quenched with water and with EtOAc The combined extracts were washed dried over Na2SO4 evaporated to dryness