反应详情

3,5-Dimethylbenzyl 2-amino-3-(3-indolyl)propionate hydrochloride (1.0 g) was suspended in tetrahydrofuran (10 ml). Triethylamine (0.38 ml) was added and the solution was stirred at room temperature for 15 minutes. Methyl isocyanate (0.19 ml) was added and the solution was stirred for 1 hour. The tetrahydrofuran was removed in vacuo and the residue was taken up in ethyl acetate. The organic phase was washed with dilute hydrochloric acid, water and sodium bicarbonate solution. The organic extract was dried (Na2SO4) and evaporated. The residual solid was recrystallised from ethyl acetate/petroleum ether to yield the title compound, (1.17 g), m.p. 66°-68° C. 1H NMR (360 MHz, CDCl3) δ7.99 (1H, s), 7.52 (1H, d, J=8 Hz), 7.30 (1H, d, J=8 Hz), 7.16 (1H, t, J=8 Hz), 7.08 (1H, t, J=8 Hz), 6.96 (1H, s), 6.88 (2H, s), 6.76 (1H, s), 5.01 (2H, s), 4.83 (1H, m), 3.26 (2H, d, J=5 Hz), 2.65 (3H, s), 2.30 (6H, s). Found: C, 68.64; H, 6.36; N, 10.86. C22H25O3N3. 0.3(H2O) requires C, 68.57; H, 6.66; N, 10.90.

1. stirringthe solution was stirred for 1 hour
2. customThe tetrahydrofuran was removed in vacuo
3. washThe organic phase was washed with dilute hydrochloric acid, water and sodium bicarbonate solution
4. extractionThe organic extract
5. dry with materialwas dried (Na2SO4)
6. customevaporated
7. customThe residual solid was recrystallised from ethyl acetate/petroleum ether