反应详情

温度

60 °C

A solution of 1 N aqueous sodium hydroxide solution (1 mL) was added to trans-methyl 2-({4′-[(5-fluoro-1,3-benzothiazol-2-yl)amino]-1,1′-biphenyl-4-yl}carbonyl)cyclopentane-carboxylate (55 mg, 0.12 mmol) in THF (2 mL). Methanol was added until the mixture became homogeneous, and the resulting solution was heated at 60° C. for 1 h. The reaction was concentrated under reduced pressure to remove excess solvents, and the residue was partitioned between water and chloroform/isopropanol (4:1). The aqueous layer was adjusted to pH 2 by addition of aqueous phosphoric acid solution, with stirring. The organic layer was then separated, dried (Na2SO4), and concentrated under reduced pressure. The residue was suspended in acetone, and the resulting solid was collected by filtration and dried in vacuo to provide the title compound (45 mg, 84%). 1H NMR (300 MHz, acetone-d6) δ 10.40–10.10 (br s, 1 H), 8.15 (d, 2 H), 8.01 (d, 2 H), 7.87–7.82 (m, 5 H), 7.41 (dd, 1 H), 7.05–6.95 (m, 1 H), 4.26–4.17 (m, 1 H), 3.43–3.34 (m, 1 H), 2.31–2.23 (m, 1 H), 1.98–1.70 (m, 5 H); LC-MS m/z 461.3 (MH+), retention time 3.56 minutes.

1. concentrationThe reaction was concentrated under reduced pressure
2. customto remove excess solvents
3. customthe residue was partitioned between water and chloroform/isopropanol (4:1)
4. additionThe aqueous layer was adjusted to pH 2 by addition of aqueous phosphoric acid solution
5. customThe organic layer was then separated
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated under reduced pressure
8. filtrationthe resulting solid was collected by filtration
9. customdried in vacuo