反应详情

A solution of 2,4-dihydroxy-benzaldehyde (2 g, 14.5 mmol) in 20 ml THF was cooled to 0° C. To this solution were added triphenylphosphine (9.7 g, 37 mmol), 2-(2-phenyl-5-methyl-oxazol-4-yl)-ethanol (2.84 g, 14 mmol) and finally during 0.75 hours a solution of di-tert-butyl azodicarboxylate (8.52 g, 37 mmol) in 20 ml THF. The reaction mixture was stirred overnight at room temperature, evaporated to dryness, purified by chromatography (SiO2; AcOEt/heptane) and the product was crystallized from AcOEt/ether/heptane to yield 2.2 g (46%) as a colorless solid.

1. customevaporated to dryness
2. custompurified by chromatography (SiO2; AcOEt/heptane)
3. customthe product was crystallized from AcOEt/ether/heptane
4. customto yield 2.2 g (46%) as a colorless solid