反应详情

To a solution of N-[(1E)-phenylmethylidene]-1H-imidazol-2-amine (1.00 g, 5.84 mmol) in DMF (20 mL) was added KOt-Bu (0.80 g, 7.13 mmol) and 1-iodopropane (0.63 mL, 6.46 mmol). After 3.5 h, the reaction was diluted with water (50 mL) and extracted with EtOAc (3×50 mL). The combined organic layers were washed with brine, dried over Na2SO4, decanted, and concentrated. The crude product was purified by column chromatography (Biotage, 40M) with heptanes/EtOAc (2:1) to give 1.12 g (90%) of yellow liquid: 1H NMR (400 MHz, CDCl3) δ 9.23, 7.94, 7.47, 7.02, 6.94, 4.14, 1.83, 0.95; IR (liq.) 2966, 2935, 2876, 1612, 1576, 1509, 1477, 1450, 1313, 1282, 1150, 761, 738, 716, 690 cm−1; HRMS (FAB) calcd for C13H15N3+H 214.1344, found 214.1336.

1. extractionextracted with EtOAc (3×50 mL)
2. washThe combined organic layers were washed with brine
3. dry with materialdried over Na2SO4
4. customdecanted
5. concentrationconcentrated
6. customThe crude product was purified by column chromatography (Biotage, 40M) with heptanes/EtOAc (2:1)