反应详情

3A (0.19 g, 0.52 mmol) was dissolved in dichloromethane (20 mL) and TFA (1.95 mL, 26 mmol) was added. The reaction mixture was stirred at room temperature for two hours. K2CO3 (5 g) was added in portions and the mixture was stirred for 20 min. A saturated solution of K2CO3 (aq) was added and the mixture was transferred to a separatory funnel. The layers were separated and the aqueous layer was further extracted several times with dichloromethane. The combined organic solutions were dried (phase separator) and evaporated. There was obtained 128 mg (94%) of 3B as an oil. 1H NMR (500 MHz, CDCl3): δ 3.34 (s, 4H), 3.45 (s, 2H), 3.80 (m, 2H), 3.92 (m, 2H), 4.72 (s, 4H), 4.98 (m, 1H), 6.69 (d, 2H), 7.13 (d, 2H), MS (APCI+) m/z 261 [M+H]+.

1. stirringthe mixture was stirred for 20 min
2. customthe mixture was transferred to a separatory funnel
3. customThe layers were separated
4. customThe combined organic solutions were dried (phase separator)
5. customevaporated