Stannous chloride dihydrate → 1-(4-Hydrazinobenzyl)-4-methylpiperazine

Beteiligte Stoffe

Reaktionsschritte

To a stirred solution of 4-[(4-methylpiperazin-1-yl)methyl]aniline (3.2 g, 15.57 mmol) in acetic acid: concentrated HCl (32:32 mL) at 10° C. was added NaNO2 (1.30 g, 18.78 mmol) in water (16 mL) and stirred for 10 min. Freshly prepared SnCl2.2H2O (11.75 g, 51.97 mmol) in concentrated HCl (32 mL) was added at 10° C. The temperature of the reaction mixture was allowed to rise to room temperature and maintained there for 4 hr. After filtering the reaction mixture, the precipitate was washed with water and the solid obtained was dried under reduced pressure to obtain 1-(4-hydrazinobenzyl)-4-methylpiperazine (3.4 g). 1H NMR (CD3OD, 200 MHz) δ: 7.66 (2H, d, J=8.4 Hz), 7.13 (2H, d, J=8.4 Hz), 4.46 (2H, s), 3.72 (8H, bm), 3.11 (3H, s);

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