2-(3-methyl-3-nitrobutyl)-1,3-dioxolane

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

Procedure: A suspension of 2,4-difluorobenzaldehyde (290.6 mg, 2.04 mmol), 2-(3-methyl-3-nitrobutyl)-1,3-dioxolane (776.8 mg, 4.11 mmol) and zinc (402.7 mg, 6.16 mmol) in ethanol (5 ml) was cooled to 0° C. in ice-water bath. Acetic acid (0.69 ml, 12.0 mmol) was added dropwise to the mixture. The mixture was gradually warmed to room temperature and stirred for 10 hours and let stand overnight. The mixture was filtered through Celite® bed and the filtrate was concentrated and purified by silica gel chromatography (hexane/ethyl acetate=4/1-1/1) to give the title compound (419.4 mg; 69%). let stand overnight The mixture was filtered through Celite® bed the filtrate was concentrated purified by silica gel chromatography (hexane/ethyl acetate=4/1-1/1)

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

Procedure: A suspension of 2,4-difluorobenzaldehyde (290.6 mg, 2.04 mmol), 2-(3-methyl-3-nitrobutyl)-1,3-dioxolane (776.8 mg, 4.11 mmol) and zinc (402.7 mg, 6.16 mmol) in ethanol (5 ml) was cooled to 0° C. in ice-water bath. Acetic acid (0.69 ml, 12.0 mmol) was added dropwise to the mixture. The mixture was gradually warmed to room temperature and stirred for 10 hours and let stand overnight. The mixture was filtered through Celite® bed and the filtrate was concentrated and purified by silica gel chromatography (hexane/ethyl acetate=4/1-1/1) to give the title compound (419.4 mg; 69%). let stand overnight The mixture was filtered through Celite® bed the filtrate was concentrated purified by silica gel chromatography (hexane/ethyl acetate=4/1-1/1)