反応 #73455
ord-ccd1a503b4e54b72a9bf1f0908587715
反応方程式
反応物
試薬
反応条件
後処理
- 1洗浄washed with water (2×40 mL)
- 2その他dried
- 3その他Evaporation of organic layer
- 4その他gave a residue
- 5その他The residue was triturated with diisopropyl ether (20 mL)
実験手順
To a solution of compound 10 (3.00 g, 11.6 mmol) in CH2Cl2 at 0° C. (60 mL) was added piperazine-1-ethanol (11) (1.82 g, 14.0 mmol), EDC (3.12 g, 16.3 mmol), HOBt (0.20 g) and DIPEA (5.8 mL, 34.9 mmol). The mixture was allowed to warm to RT over 16 h. TLC (5% MeOH/CH2Cl2) showed no starting material. The reaction mixture was diluted with CH2Cl2 (50 mL), washed with water (2×40 mL) and dried. Evaporation of organic layer gave a residue. The residue was triturated with diisopropyl ether (20 mL) to get 3-[4-(2-hydroxy-ethyl)-piperazine-1-carbonyl]-7-oxa-bicyclo[2.2.1]heptane-2-carboxylic acid benzyl ester (12) as a white solid. Yield: 3.24 g (72%). Mp 72-75 C. 1H NMR (300 MHz, CDCl3) δ 1.42-1.56 (m, 2H); 1.76-1.82 (m, 2H); 2.02 (s, 2H); 2.29-2.51 (m, 4H); 2.90 (d, J=6.4 Hz, 1H); 3.08 (d, J=6.1 Hz, 1H); 3.18-3.24 (m, 2H); 3.41 (bs, 1H); 3.60 (t, J=2.3 Hz, 2H); 3.69 (bs, 1H); 4.90 (dd, J=6.8 Hz, 2.3 Hz, 2H); 5.08 (s, 2H); 7.28-7.40 (m, 5H).