反应详情

A solution of 2-chloro-1,3-difluoro-4-nitrobenzene (80 g, 415 mmol) and benzyl alcohol (47 g, 435 mmol) in DMF (500 mL) was treated with K2CO3 (120 g, 870 mmol) and stirred at RT overnight. The mixture was poured into water, extracted with EtOAc (3×) and the combined organics were washed with brine, dried over Na2SO4, concentrated to dryness and purified via silica gel chromatography to afford 1-(benzyloxy)-2-chloro-3-fluoro-4-nitrobenzene (45 g, 39%). 1H NMR (400 MHz, DMSO-d6): δ 8.21 (t, J=9.2 Hz, 1 H), 7.49-730 (m, 6 H), 5.40 (s, 2H).

1. extractionextracted with EtOAc (3×)
2. washthe combined organics were washed with brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated to dryness
5. custompurified via silica gel chromatography