反应详情

A solution of 2-phenylacetic acid (12 g, 88 mmol) in tBuOAc (250 mL) in a 1 L round-bottomed flask was treated with perchloric acid, 70% redistilled (0.212 mL, 3.53 mmol) stirred at room temperature for 20 hours. The solution was transferred very slowly to stirred mixture of saturated aqueous NaHCO3 and Et2O. Extensive bubbling was observed. The resulting layers were separated and the organic layer washed with saturated aqueous NaHCO3, dried over MgSO4, filtered, and concentrated to give tert-butyl 2-phenylacetate, Intermediate S5A (11.6 g, 68% yield). 1H NMR (500 MHz, chloroform-d) δ 7.34-7.29 (m, 2H), 7.28-7.22 (m, 3H), 3.52 (s, 2H), 1.44 (s, 9H).

1. distillationredistilled (0.212 mL, 3.53 mmol)
2. stirringto stirred
3. additionmixture of saturated aqueous NaHCO3 and Et2O
4. customExtensive bubbling
5. customThe resulting layers were separated
6. washthe organic layer washed with saturated aqueous NaHCO3
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated