反应详情

温度

-10 °C

A 100 mL round bottomed flask was charged with 3-[4-(tert-butyldiphenylsilanyloxy)-2-hydroxymethylphenyl]propionic acid tert-butyl ester (1.52 g, 3.10 mmol), anhydrous DMF (15 mL), and then benzyl bromide (1.84 mL, 15.5 mmol) under a nitrogen atmosphere. The solution was cooled to −10° C., and NaH (0.124 g, 3.10 mmol, 60% oil dispersion) was added. The mixture was stirred for 5 h, and was poured into EtOAc (150 mL). The organic layer was washed with brine (2×), dried (Na2SO4), and concentrated to a brown oil. The crude oil was purified using radial chromatography (EtOAc:hexanes 2:98 to 5:95) to give a pale yellow oil (1.04 g, 58%). MS (ES) m/e 598 (M+NH4).

1. washThe organic layer was washed with brine (2×)
2. dry with materialdried (Na2SO4)
3. concentrationconcentrated to a brown oil
4. customThe crude oil was purified