反应详情

A solution of tert-butyl (2R,5S)-2-[(R)-{[tert-butyl(dimethyl)silyl]oxy}(pyridin-3-yl)methyl]-5-[4-(methoxycarbonyl)benzyl]pyrrolidine-1-carboxylate (11.0 g, 20.3 mmol) in 100 mL of 2 M tetrabutylammonium fluoride tetrahydrofuran solution was stirred at RT overnight. The mixture was then diluted with water and extracted with ethyl acetate (50 mL×3). The combined organic layers were washed with water, brine, dried over Na2SO4, and concentrated to afford 8.51 g (98%) of the title compound. 1H NMR (400 MHz, CDCl3): δ 8.55 (s, 2H), 7.93 (d, J=8.0 Hz, 2H), 7.76 (d, J=8.0 Hz, 1H), 7.34-7.28 (m, 3H), 6.36 (s, 1H), 4.54 (d, J=8.5 Hz, 1H), 4.18-4.09 (m, 2H), 3.92 (s, 3H), 3.23 (s, 1H), 3.13-3.10 (m, 1H), 2.61-2.52 (m, 1H), 1.78-1.60 (m, 2H), 1.49 (s, 9H). MS: m/z (ESI) 427 (M+1).

1. extractionextracted with ethyl acetate (50 mL×3)
2. washThe combined organic layers were washed with water, brine
3. dry with materialdried over Na2SO4
4. concentrationconcentrated