反应详情

5-Bromo-6-chloropicolinic acid (200 mg, 846 μmol; CAN 959958-25-9) and powdered potassium hydroxide (190 mg, 3.38 mmol) were combined with DMSO (1.93 mL) to give a colorless solution which was stirred for 15 min at ambient temperature before tetrahydro-2-furanmethanol (130 mg, 123 μl, 1.27 mmol, CAN 97-99-4) was added, and stirring continued for 1 day at ambient temperature. The reaction mixture was poured into a mixture of ice-water and 1 M NaOH, and extracted with t-butylmethyl ether (2×25 mL) and washed with ice-water/brine. The water phases were combined acidified with ice/1 N HCl and extracted with isopropyl acetate (2×30 mL). The organic layers were washed with ice-water/brine (2×30 mL), dried with Na2SO4 and concentrated in vacuo to give the title compound (254 mg, 99%) as light brown oil; MS (ESI): 301.8 [M−H]−.

1. customto give a colorless solution which
2. additionwas added
3. extractionextracted with t-butylmethyl ether (2×25 mL)
4. washwashed with ice-water/brine
5. extractionextracted with isopropyl acetate (2×30 mL)
6. washThe organic layers were washed with ice-water/brine (2×30 mL)
7. dry with materialdried with Na2SO4
8. concentrationconcentrated in vacuo