反应详情

In a round-bottomed flask was added sodium hydride (3.24 mmol, 78 mg) in Et2O (5 mL). A mixture of p-toluenesulfonylmethyl isocyanide (3.24 mmol, 634 mg) and (E)-methyl 4,4,4-trifluorobut-2-enoate (3.24 mmol, 500 mg) were added in a 2:1 mixture of Et2O/DMSO (22.5 mL). The reaction mixture was stirred for a further 30 min then quenched with H2O (10 mL) and extracted with Et2O (×3). The Et2O layers were combined and washed with brine, dried over MgSO4, filtered and the solvent removed to give a yellow/orange solid. Purification by flash chromatography (1:4 EtOAc:Hept) the desired product (154 mg, 0.80 mmol, 24.6%). 1H NMR (400 MHz, CD3OD) δ 3.79 (s, 3H) 7.20 (s, 1H) 7.50 (s, 1H).

1. customthen quenched with H2O (10 mL)
2. extractionextracted with Et2O (×3)
3. washwashed with brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. customthe solvent removed
7. customto give a yellow/orange solid