反应详情

A solution of 27 (547 mg, 2.35 mmol) and carbonyl diimidazole (837 mg, 5.16 mmol) in 4.7 mL of dry THF under a N2 atmosphere was refluxed for 5 minutes. Once the reaction cooled down to room temperature 4-fluorobenzyl amine (0.295 mL, 2.58 mmol) was added and the mixture was heated to reflux overnight. The reaction mixture was then concentrated and re-dissolved in EtOAc. The organic layer was washed with an aqueous 0.5 N HCl solution and the solvent was removed in vacuo. The product was purified by column chromatography eluting with CH2Cl2 to provide clean product 28 as a clear oil. 1H NMR (300 MHz, CDCl3) δ 1.47 (s, 9H), 4.39 (s, 4H), 4.92 (s, 2H), 6.99 (t, 2H, J=9 Hz), 7.40 (dd, 2H, J=5, 9 Hz); 13C NMR (75 MHz, CDCl3) δ 28.1, 42.0, 47.1, 82.3, 115.2, 115.5, 131.1, 131.2, 132.0, 153.0, 162.7 (d, J=245 Hz), 168.0; 19F NMR (282.6 MHz, CDCl3) δ 62.5; EI MS (m/z) 340.5 [M+Na].

1. additionwas added
2. temperaturethe mixture was heated
3. temperatureto reflux overnight
4. concentrationThe reaction mixture was then concentrated
5. dissolutionre-dissolved in EtOAc
6. washThe organic layer was washed with an aqueous 0.5 N HCl solution
7. customthe solvent was removed in vacuo
8. customThe product was purified by column chromatography
9. washeluting with CH2Cl2