反应详情

To THF solution of 0.409 g (2.4 mmol) methyl 3-hydroxyphenylacetate, 0.50 g (20.5 mmol) N-Boc-piperidin-4-yl-propanol and 0.645 g (24.6 mmol) triphenylphosphine was added diisopropyl azodicarboxylate at 0° C. slowly, then the ice bath was removed and the reaction mixture was stirred at room temperature overnight. The solvent was removed by rotary evaporation, the residue was dissolved in 2 mL methylene chloride and was loaded on a silica gel column and, the product eluted with 80% hexane and 20% ethyl acetate. Methyl 3-(3-(N-Boc-piperidin-4-yl)-propoxy)-phenylacetate (0.5 g, 62%) was obtained. 1H NMR (500 MHz, CDCl3) δ 1.1 (m, 2H), 1.4 (m, 2H), 1.46 (s, 9H), 1.66 (d, 2H), 1.78(m, 2H), 2.67 (t, 2H), 3.58 (s, 2H), 3.68 (s, 3H), 4.05 (m, 2H), 6.75 (m, 3H), 7.18 (dd, 1H).

1. customthe ice bath was removed
2. customThe solvent was removed by rotary evaporation
3. dissolutionthe residue was dissolved in 2 mL methylene chloride
4. washthe product eluted with 80% hexane and 20% ethyl acetate