反应详情

To a stirred −78° C. solution of 4-chloro-2-methylbenzonitrile (5.00 g, 32.98 mmol) in Et2O (190 mL) was added 1 M DIBAL in THF (66.0 mL) over 10 min. After 5 h additional 1M DIBAL in THF (3.30 mL) was added dropwise and the solution was stirred for 1 hour. The reaction was quenched with water followed by concentrated H2SO4 and stirred at ambient temperature for 16 h. The solution was extracted into Et2O, dried (Na2SO4) and reduced in vacuo. 4-Chloro-2-methylbenzaldehyde was isolated as a yellow oil. 1H NMR (CDCl3, 400 MHz) δ 2.59 (s, 3H), 7.19 (s, 1H), 7.26 (d, J=8.2 Hz, 1H), 7.66 (d, J=8.2 Hz, 1H), 10.15 (s, 1H).

1. customThe reaction was quenched with water
2. stirringstirred at ambient temperature for 16 h
3. extractionThe solution was extracted into Et2O
4. dry with materialdried (Na2SO4)