Dimethyl Sulfoxide → N-butyl-2-((4R,6S)-6-formyl-2,2-dimethyl-1,3-dioxan-4-yl)acetamide

Participants

Reaction Steps

N-butyl-2-((4R,6S)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetamide (2 grams) in methylene chloride (10 ml) was added a mixture of oxalyl chloride (1.46 grams), dimethyl sulfoxide (1.36 ml) and methylene chloride (12 ml) at −65 to −60° C. under nitrogen atmosphere and stirred for 45 minutes. Triethylamine (5 ml) was added to the reaction mixture at −65 to −60° C., stirred for 60 minutes and then added to ice-water. The reaction mixture was acidified with acetic acid solution and stirred. Both organic and aqueous layers were separated and organic layer washed with water followed by sodium chloride solution. The solvent from organic layer was distilled off under reduced pressure to get the title compound.

Provenance & Evidence