反应详情

To 0.5 g (3.9 mmol) of 6-chloro-pyridin-3-ylamine in 6 mL of 12M HCl at −20° C. were added a solution of 0.36 g (5.2 mmol, 1.3 eq) of sodium nitrite dissolved in 2 mL of H20. The reaction mixture was stirred for 15 min, and 4.4 g (19.5 mmol, 5 eq) of tin chloride dihydrate dissolved in 2 mL of 12M HCl were added. The reaction mixture was allowed to reach 0° C. within 40 min, and the white precipitate was recovered by filtration and washed with Et2O to yield 0.35 g (62%) of (6-chloro-pyridin-3-yl)-hydrazine hydrochloride as a white solid, MS: 144 (MH+).

1. dissolutiondissolved in 2 mL of H20
2. additionwere added
3. waitto reach 0° C. within 40 min
4. filtrationthe white precipitate was recovered by filtration
5. washwashed with Et2O