Hydrazine hydrate (1:1) → 4-Chloro-6-hydrazinylpyrimidine

Participants

Reaction Steps

A mixture of 4,6-dichloro-pyrimidine (18.68 g, 125 mmol), hydrazine monohydrate (18.28 mL, 376 mmol), and 2-propanol (300 mL) was stirred at room temperature for 3 hours. The reaction mixture was concentrated, triturated with water, and filtered. The solid was washed with water, air-dried to give (6-chloro-pyrimidin-4-yl)-hydrazine (16.97 g, Yield 94%): 1H NMR 400 MHz (d6-DMSO) δ 8.83 (s, 1H), 8.17 (s, 1H), 6.76 (s, 1H), 4.50 (s, 2H); MS m/z 145.02 (M+1).

Provenance & Evidence