反应详情

In a 250 mL round bottom flask, 5.00 g (25.5 mmol) dihexylketone, 19.7 g (255 mmol) ammonium acetate, and 1.10 g (17.8 mmol) sodium cyanoborohydride (NaBH3CN) were dissolved in 75 mL absolute MeOH and stirred at room temperature for 48 hours, until no significant amount of the starting material could be detected by NMR. The mixture was quenched by adding concentrated hydrochloric acid (HCl) dropwise (˜3 mL), then concentrated in vacuo. The resulting white solid was taken up in 500 mL water, basified to pH 10 with solid potassium hydroxide (KOH), and extracted with chloroform (CHCl3) twice (200 mL each). The CHCl3 fractions were combined and concentrated to give 4.12 g (81%) of 1-hexylheptylamine 1 as a pale yellow oil. 1H NMR (D2O, 500 MHz): δ 0.73 (t, 6H), 1.15-1.23 (m, 16H), 1.55 (m, 4H), 3.13 (m, 1H).

1. customThe mixture was quenched
2. additionby adding concentrated hydrochloric acid (HCl) dropwise (˜3 mL)
3. concentrationconcentrated in vacuo
4. extractionextracted with chloroform (CHCl3) twice (200 mL each)
5. concentrationconcentrated