反应详情

To a stirred solution of 4-bromophenyl acetic acid 34 (2.000 g, 9.300 mmol) and 2-benzo[1,3]dioxol-5-yl-ethylamine hydrochloride salt 33 (2.063 g, 10.230 mmol) in anhydrous DMF (25 mL) was added triethyl amine (2.823 g, 27.900 mmol) followed by diethyl cyanophosphonate (1.669 g, 10.230 mmol) at 00 C and the reaction mixture was stirred at room temperature overnight, poured into ice-water. The precipitated was filtered, washed with water and air-dried. The crude product was recrystallized using CHCl3-Hexane to get compound 35 as a white sold (3.133 g, 93%). 1H NMR (300 MHz, DMSO-d6) δ 8.06 (t, J=5.1 Hz, 1H, —NH), 7.47 (d, J=8.4 Hz, 2H, ArH), 7.16 (d, J=8.1 Hz, 2H, ArH), 6.79 (d, J=7.8 Hz, 1H, ArH), 6.74 (s, 1H, ArH), 6.60 (d, J=7.8 Hz, 1H, ArH), 5.96 (s, 2H, —CH2), 3.35 (s, 2H, —CH2), 3.32 (q, J=6.9 Hz, 2H, —CH2), 2.60 (t, J=7.2 Hz, 2H, —CH2). MS (ES+) m/z 384 (M+Na)+.

1. filtrationThe precipitated was filtered
2. washwashed with water
3. customair-dried
4. customThe crude product was recrystallized