反应详情

To a solution of intermediate 33, 1-(3-{[tert-butyl(dimethyl)silyl]oxy}-2-fluorobenzyl)pyrrolidine (19 g, 60 mmol) in MeOH (200 mL) was added KF (7.1 g, 120 mmol), and the mixture was stirred at RT for 1 h. The reaction mixture evaporated in vacuo. Water (100 mL) and concentrated HCl were added to attain pH˜6. The organic layer was separated. The aqueous one was extracted with CH2Cl2 (2×100 mL). The organic layers were discarded. The aqueous fraction was alkalized with K2CO3 to pH˜10, the aqueous one was extracted with CHCl3. The organic layer was washed with brine, dried over Na2SO4 and evaporated in vacuo, recrystallized from Et2O/hexane mixture (1:1) to give the title compound (9.3 g, 78%, 48 mmol) as a yellow crystals. LCMS data: 197.1 and 196.1 (M+H)+ (calculated for C11H14FNO 195.24). 1H NMR data (DMSO-d6): 9.63 (s, 1H, OH), 6.87-6.96 (m, 1H, H—Ar), 6.71-6.85 (m, 2H, H—Ar), 3.58 (s, 2H, Ar—CH2); 2.36-2.46 (m, 4H), 1.61-1.72 (m, 4H).

1. customThe reaction mixture evaporated in vacuo
2. additionWater (100 mL) and concentrated HCl were added
3. customThe organic layer was separated
4. extractionThe aqueous one was extracted with CH2Cl2 (2×100 mL)
5. extractionthe aqueous one was extracted with CHCl3
6. washThe organic layer was washed with brine
7. dry with materialdried over Na2SO4
8. customevaporated in vacuo
9. customrecrystallized from Et2O/hexane mixture (1:1)