2-氨基-5-溴-4-甲基吡啶 → 6-氨基-4-甲基-3-氰基吡啶

参与物

反应条件

反应步骤

A mixture of 5-bromo-4-methyl-2-pyridinamine (0.50 g, 2.7 mmol) and copper (I) cyanide (0.263 g, 2.9 mmol) in DMF (12 mL) was heated at 200° C. for a total of 1.75 h in a microwave reactor. The reaction mixture was diluted with EtOAc and water. The resulting thick dark precipitate was filtered off. The filtrate was extracted with EtOAc (×3) and the combined extracts were dried and concentrated to give a dark yellow solid (0.115 g). The filter cake was and washed with 1:1 DCM/MeOH (1 L) which was concentrated to give a second batch of dark yellow solid (0.047 g). The filter cake was washed with 2M NH3 in MeOH (200 mL) which was concentrated to give a dark green solid (0.533 g). These 3 batches of solids were purified by column chromatography using 0-100% EtOAc/hexane as the eluent to give the title compound as a white solid (total yield: 0.213 g). δH (CDCl3, 400 MHz) 8.28 (1H, s), 6.36 (1H, s), 4.87 (2H, br.s), 2.40 (3H, s). MS (ES): MH+ 134.1.

来源与证据