反应详情

(R)-4-(5-Bromo-6-hydroxy-naphthalen-2-yl)-4-methyl-oxazolidin-2-one (2.16 g, 6.70 mmol) was dissolved in tetrahydrofuran (22.50 mL, 277.4 mmol) in a capped 250 mL round-bottom flask equipped with a magnetic stir bar. trans-4-tert-Butyl-cyclohexanol (2.095 g, 13.41 mmol) and triphenylphosphine (3.517 g, 13.41 mmol) were added and the mixture was stirred for 5 minutes. Diisopropyl azodicarboxylate (2.640 mL, 13.41 mmol) was then slowly added and the reaction mixture was stirred at room temperature overnight. The mixture was concentrated in vacuo, diluted in methylene chloride and adsorbed onto silica gel under reduced pressure, then purified by flash chromatography (0-55% EtOAC in hexanes) to give 1.37 g of the title compound (45% yield).

1. customequipped with a magnetic stir bar
2. stirringthe reaction mixture was stirred at room temperature overnight
3. concentrationThe mixture was concentrated in vacuo
4. additiondiluted in methylene chloride
5. custompurified by flash chromatography (0-55% EtOAC in hexanes)