反应详情

in 40 ml of tetrahydrofuran were dissolved 1.38 g of 2,4-dihydroxybenzaldehyde, 1.87 g of (3R)-1-tert-butoxycarbonyl-3-hydroxypyrrolidine and 2.88 g of triphenylphosphone. The thus prepared solution was mixed with 1.91 g of diethyl azodicarboxylate and stirred at room temperature for 1 hour. After distilling off the solvent, the resulting residue was purified by subjecting it to silica gel column chromatography, thereby obtaining 1.2 g of 4-[((3S)-1-tert-butoxycarbonyl-3-pyrrolidinyl)oxy]-2-hydroxybenzaldehyde in a viscous and oily form.

1. distillationAfter distilling off the solvent
2. customthe resulting residue was purified