反应详情

To a solution of 2-chloro-5-nitrophenol (3.39 g, 19.52 mmol), tetrahydrofurfuryl alcohol (1.99 g, 19.52 mmol), and Ph3P (5.12 g, 19.52 mmol) in 34 ml THF, cooled to −15° C., was added dropwise, over 90 min, a solution of DIAD (4.15 g, 20.5 mmol). The reaction was warmed to RT and stirred for 18 h. The reaction was concentrated to dryness. The crude residue was treated with a small mix of Et2O and hexanes and sonicated so as to triturate out bulk of impurities, which were filtered off. The filtrate was concentrated to dryness. The resulting residue was purified by silica gel column chromatography using EtOAc in hexanes to elute the title compound.

1. additionwas added dropwise, over 90 min
2. concentrationThe reaction was concentrated to dryness
3. additionThe crude residue was treated with
4. additiona small mix of Et2O and hexanes
5. customsonicated so as
6. customto triturate out bulk of impurities, which
7. filtrationwere filtered off
8. concentrationThe filtrate was concentrated to dryness
9. customThe resulting residue was purified by silica gel column chromatography
10. washto elute the title compound