反应详情

A solution of 13 (214 mg, 0.74 mmol) in MeOH (6.20 mL) was treated dropwise with 3 M HCl (0.22 mL, 5.92 mmol), then heated to reflux for 1 hour. Water (10 mL) was added and the solution was extracted with EtOAc (3×15 mL). Combined organic fractions were washed with saturated aqueous NaCl, dried (Na2SO4), and concentrated to afford 14 as a red amorphous solid (149 mg, 99%). 1H NMR (CDCl3, 400 MHz) 7.31 (d, J=6.6 Hz, 4H), 7.25-7.19 (m, 1H), 7.01 (t, J=8.1 Hz, 1H), 6.44 (d, J=8.1 Hz, 2H), 4.82 (s, 2H), 4.09 (s, 2H).

1. temperatureheated
2. temperatureto reflux for 1 hour
3. extractionthe solution was extracted with EtOAc (3×15 mL)
4. washCombined organic fractions were washed with saturated aqueous NaCl
5. dry with materialdried (Na2SO4)
6. concentrationconcentrated