反应详情

温度

40 °C

To 4-aminomethyl-benzoic acid (10.6 g, 70.1 mmol) in dioxane (130 mL) was added 9% aqueous Na2CO3 (150 mL) followed by 9-fluorenylmethyloxycarbonyl-N-hydroxysuccinimide (26 g, 77 mmol). The solution was heated to 40° C. for 12 h and then cooled to room temperature. The reaction was acidified with 1 M HCl (500 mL), and extracted with ether (300 mL) to obtain acid S23 as a fluffy white solid (25.9 g, 69.4 mmol, 99%). 1H NMR (500 MHz, d6-DMSO): δ 12.85 (broad s, 1H), 7.90 (m, 4H), 7.70 (m, 2H), 7.39 (m, 2H), 7.31 (m, 4H), 4.37 (d, 2H, J=6.8 Hz), 4.24 (d, 2H, J=5.8 Hz), 4.23 (t, 1H, J=6.8 Hz). APCI/MS: 372 (M+H+).

1. temperaturecooled to room temperature
2. extractionextracted with ether (300 mL)