反应详情

To a colorless solution of 3-methyl-salicylic acid (1 g, 6.57 mmol) in Et2O (50 mL) under argon and cooled down to 0° C. was added dropwise methyllithium 1.6M in Et2O (12.32 mL, 19.72 mmol) over 20 min. The resulting mixture was stirred at this temperature for 30 min then allowed to warm up and stir overnight at RT. The reaction mixture was slowly poured into a stirred mixture of 100 g of ice and HCl 4N (50 mL) and extracted twice with EtOAc. The combined organic layers were washed with 10% NaHCO3 solution and brine, dried over MgSO4, filtered and concentrated under reduced pressure to afford the title product (920 mg, 5.94 mmol, 90% yield) as a pale yellow oil. tR: 0.91 min (LC-MS 2); ESI-MS: 481/483 [M+H]+, ESI-MS: 479/501 [M−H]− (LC-MS 2); Rf=0.55 (hexane/EtOAc 3:1).

1. temperatureto warm up
2. stirringstir overnight at RT
3. extractionextracted twice with EtOAc
4. washThe combined organic layers were washed with 10% NaHCO3 solution and brine
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure